Source: http://www.profratnarajah.org/publications.html
Timestamp: 2019-04-19 10:41:46+00:00

Document:
BOOK: "Spectrum Sharing: The Next Frontier in Wireless Networks"
TUTORIAL: "Transceiver Design for Full-Duplex Radios under Spectrum Sharing Environments," 13th EAI International Conference on Cognitive Radio Oriented Wireless Networks (CROWNCOM 2018), September 18-20, 2018, Ghent, Belgium.
N. GARG, M. Sellathurai and T. Ratnarajah, "Content Placement Learning for Success Probability Maximization in Wireless Edge Caching Networks," In Proc. the IEEE 44th International Conference on Acoustics, Speech and Signal Processing, Brighton, UK, 12-17. May 2019.
N. GARG, G. Sharma and T, Ratnarajah, "MSE Based Precoding Schemes for Partially Correlated Transmissions in Interference Channels," In Proc. the IEEE 44th International Conference on Acoustics, Speech and Signal Processing, Brighton, UK, 12-17. May 2019.
K. Singh, S. Biswas, O. Taghizadeh and T. Ratnarajah, "Beamforming Design for Coexistence of Full-Duplex Multi-Cell MU-MIMO Cellular Network and MIMO Radar," In Proc. the IEEE 44th International Conference on Acoustics, Speech and Signal Processing, Brighton, UK, 12-17. May 2019.
D. Basnayaka and T. Ratnarajah, "Multi-user Communication in Difficult Interference," In Proc. the IEEE 44th International Conference on Acoustics, Speech and Signal Processing, Brighton, UK, 12-17. May 2019.
Vahid Tarokh, T. Ratnarajah, and W. Tong, ''Efficient OFDM Communications with Interference Immunity,'' US Patent # 7061854, Jun. 13, 2006 [cited by 42].
T. Ratnarajah, "'Receiver System for Multiple-Transmit, Multiple-Receive (MTMR) Wireless Communications Systems," US Patent #6980600, Dec. 27, 2005 [cited by 21].
T. Ratnarajah et al., "Minimum Mean-Squared Error Block Decision-Feedback Sequence Estimation in Digital Communications Systems," US Patent #6757339, Jun. 29, 2004 [cited by 9].
T. Ratnarajah, "Space-Time Receiver Structure for Digital Communications Systems," US Patent #6650716, Nov. 18, 2003 [cited by 34].
A. Papazafeiropoulos and T. Ratnarajah, "Nuts and Bolts of a Realistic Stochastic Geometric Analysis of mmWave HetNets: Hardware Impairments and Channel Aging," IEEE Trans on Vehicular Technology,​ in press.
S Biswas, T Zhang, K Singh, S Vuppala, and T Ratnarajah, “An Analysis on Caching Placement for Millimeter/Micro Wave Hybrid Networks,” IEEE Trans. on Communications, Vol. 67, No. 2, pp., pp. 1645-1662, Feb. 2019.
S. Biswas, K. Singh, O. Taghizadeh and T. Ratnarajah, "Coexistence of MIMO Radar and FD MIMO Cellular Systems with QoS Considerations," IEEE Trans on Wireless Communications, Vol. 17, No. 11, pp. 7281-7294, Nov. 2018.
A. Papazafeiropoulos and T. Ratnarajah, "Modeling and Performance of Uplink Cache-Enabled Massive MIMO Heterogeneous Networks," IEEE Trans on Wireless Communications, Vol. 17, No. 12, pp. 8136-8149, Dec. 2018.
A. Papazafeiropoulos and T. Ratnarajah, "Rate-Splitting Robustness in Multi-Pair Massive MIMO Relay Systems,” IEEE Trans on Wireless Communications, Vol. 17, No. 8 pp. 5623-5636, Aug. 2018.
A. C. Cirik, S. Biswas, and T. Ratnarajah, "Robust Transceiver Design in Full-Duplex MIMO Cognitive Radios" IEEE Trans. on Vehicular Technology, Vol. 67, Issue 2, pp. 1313-1330, Feb. 2018.
F. Liu, C. Masouros and A. Li, T. Ratnarajah and J. Zhou, "MIMO Radar and Cellular Coexistence: A Power-Efficient Approach Enabled by Interference Exploitation," IEEE Trans. on Signal Processing, Vol. 66, No. 14, pp. 3681-3695, July 2018.
K. Singh, S. Biswas, T. Ratnarajah and F. H. Khan, "Transceiver Design and Power Allocation for Full-Duplex MIMO Communication Systems with Spectrum Sharing Radar," IEEE Trans. on Cognitive Communications and Networking, Vol. 4, No. 3, pp. 556-566, Sep. 2018.
J. Xue, S. Biswas, A. C. Cirik, H. Du, Y. Yang, T. Ratnarajah, and M. Sellathurai, "Transceiver Design of Optimum Wirelessly Powered Full-Duplex MIMO IoT Devices," IEEE Trans on Communications, Vol 66, pp. 1955-1969, May 2018.
K. Singh, M-L. Ku, T. Ratnarajah, "Toward Optimal Power Control and Transfer for Energy Harvesting Amplify-and-Forward Relay Networks," IEEE Trans on Wireless Communications, Vol. 17, No. 8, pp. 4971-4986, Aug. 2018.
A. Papazafeiropoulos, S. Sharma, S. Chatzinotas, and T. Ratnarajah, “Impact of Residual Additive Transceiver Hardware Impairments on Rayleigh-Product MIMO Channels with Linear Receivers: Exact and Asymptotic Analyses,” IEEE Trans. on Communications, Vol. 66, Issue 1, pp. 105-118, Jan. 2018.
K. Singh, A. Gupta, T. Ratnarajah, and M-L Ku, "A General Approach Toward Green Resource Allocation in Relay-Assisted Multiuser Communication Networks," IEEE Trans on Wireless Communications, Vol. 17, Issue 2, pp. 848-862, Feb, 2018.
Y. He, J. Xue, T. Ratnarajah, M. Sellathurai, and F. Khan, "On the Performance of Cooperative Spectrum Sensing in Random Cognitive Radio Networks," IEEE SYSTEMS JOURNAL, Vol. 12, No. 1, pp. 881-892, March 2018.
O. Y. Kolawole, S.Vuppala and T. Ratnarajah, "Multi-User Millimeter Wave Cloud Radio Access Networks with Hybrid Precoding," IEEE Systems Journals, Vol 12, Issue 4, pp. 3661-3672, Dec. 2018.
Y. Luo, T. Ratnarajah, J. Xue, and F. A. Khan, "Interference Alignment in Two-Tier Randomly Distributed Heterogeneous Wireless Networks Using Stochastic Geometry Approach," IEEE Systems Journal, Vol. 12, No. 1, pp. 881-892, March 2018.
P. Aquilina and T. Ratnarajah, "Linear Interference Alignment in Full-Duplex MIMO Networks with Imperfect CSI," IEEE Trans. on Communications, Vol. 65, Issue 12, pp. 5226-5243, Dec. 2017.
P. Aquilina, A. C. Cirik, and T. Ratnarajah, "Weighted Sum Rate Maximization in Full-Duplex Multi-User Multi-Cell MIMO Networks," IEEE Trans. on Communications, Vol. 65, Issue 4, pp. 1590-1608, April 2017.
A. Papazafeiropoulos, B. Clerckx, and T. Ratnarajah, "Rate-Splitting to Mitigate Residual Transceiver Hardware Impairments in Massive MIMO Systems," IEEE Trans on Vehicular Technology, Vol. 66, Issue 9, pp.8196-8211, Sep. 2017.
O. Y. Kolawole, S. Vuppala, M. Sellathurai, and T. Ratnarajah, "On the Performance of Cognitive Satellite-Terrestrial Networks," IEEE Trans. on Cognitive Communications and Networking, Vol. 3, Issue 4, pp. 668-683, Dec. 2017.
L. Zhou, F. H. Khan, T. Ratnarajah and C. B. Papadias, "Single-RF Multi-antenna Transmission with Peak Power Constraint," IEEE Trans on Communications, Vol. 65, Issue 12, pp. 5197-5208, Dec. 2017.
A. Papazafeiropoulos and T. Ratnarajah, "Towards a Realistic Assessment of Multiple Antenna HCNs: Residual Additive Transceiver Hardware Impairments and Channel Ageing," IEEE Trans on Vehicular Technology, Vol 66, Issue 10, pp. 9061-9073, Oct. 2017.
S.Vuppala, S. Biswas and T. Ratnarajah, "Secrecy Outage Analysis of k-th Best Link in Random Wireless Networks," IEEE Trans. on Communications, Vol. 65, Issue 10, pp. 4478-4491, Oct. 2017.
F. Liu, C. Masouros, A. Li, T. Ratnarajah, "Robust MIMO Beamforming for Cellular and Radar Coexistence," IEEE Wireless Communications Letters, Vol. 6, Issue 3, pp.374-377, April 2017.
K. Singh, A. Gupta and T.Ratnarajah, "QoS-Driven Resource Allocation and EE-Balancing for Multiuser Two-Way Amplify-and-Forward Relay Networks," IEEE Trans on Wireless Communications, Vol. 16, Issue 5, pp. 3189-3204, March 2017.
K. Singh, A. Gupta and T.Ratnarajah, "Energy Efficient Resource Allocation for Multiuser Relay Networks," IEEE Trans on Wireless Communications, Vol. 16, Issue 2, pp. 1218-1235, Feb. 2017.
K. Singh, A. Gupta and T.Ratnarajah "QoS-Driven Energy-Efficient Resource Allocation in Multiuser Amplify-and-Forward Relay Networks," IEEE Trans. on Signal and Information Processing over Networks, Vol. 3, Issue 4, pp. 771-786, Dec. 2017.
A. Papazafeiropoulos, H. Ngo and T. Ratnarajah, "Performance of Massive MIMO Uplink with Zero-Forcing receivers under Delayed Channels," IEEE Trans. on Vehicular Technology, Vol. 66, No. 4, pp. 3158-3169, April 2017.
A. C. Cirik, S. Biswas, S. Vuppala, and T. Ratnarajah, "Beamforming Design for Full-Duplex MIMO Interference Channels-QoS and Energy-Efficiency Considerations," IEEE Trans. on Communications, Vol 64, No 11, pp. 4635-4651, Nov. 2016.
S. Biswas, S.Vuppala, and T. Ratnarajah, "On the Performance of mmWave Networks aided by Wirelessly Powered Relays," IEEE Journal of Selected Topics in Signal Processing (Special Issue on Exploiting Interference towards Energy Efficient and Secure Wireless Communications), Vol. 10, No 8, pp 1522-1537, Dec. 2016.
M. Artuso, ..., F. Khan,...., T. Ratnarajah,...,L. Zhou, "Enhancing LTE with Cloud-RAN and Load-Controlled Parasitic Antenna Arrays," IEEE Communications Magazine, pp183-191, Dec. 2016.
W. Liu, M. Z. I. Sarkar, T. Ratnarajah and H. Du, "Securing Cognitive Radio with a Combined Approach of Beamforming and Cooperative Jamming," IET Communications, Sep. 2016.
S.Vuppala, S. Biswas and T. Ratnarajah, "An Analysis on Secure Communication in Millimeter/Micro-Wave Hybrid Networks," IEEE Trans. on Communications, Vol. 64, No. 8, pp. 3507-3519, Aug. 2016.
A. Papazafeiropoulos and T. Ratnarajah, "Downlink MIMO HCNs with Residual Transceiver Hardware Impairments," IEEE Communications Letters, Vol 20, No. 10, pp. 2023-2026, Oct 2016.
A. Cirik, M. C. Filippou, and T. Ratnarajah, "Transceiver Design in Full-Duplex MIMO Cognitive Radios under Channel Uncertainties," IEEE Trans. on Cognitive Communications and Networks, Vol. 2, No. 1, pp. 1-14, March 2016.
A. Cirik, L. Zhou, and T. Ratnarajah, "Linear Transceiver Design With Per-Antenna Power Constraints in Full-Duplex Multi-user MIMO Systems," IEEE Wireless Communications Letters, pp. 412-415, Vol 5, No. 4, Aug. 2016.
H.He, J. Xue, T. Ratnarajah, F. A. Khan and C. B. Constantinos, “Modeling and Analysis of Cloud Radio Access Networks Using Mat\'ern Hard-core Point Processes,” IEEE Trans on Wireless Communications, Vol. 15, No. 6, pp. 4074-4087, June 2016.
M. C. Filippou, G. A. Ropokis, D. Gesbert, and T. Ratnarajah, "Joint Sensing and Reception Design of SIMO Hybrid Cognitive Radio Systems," IEEE Trans on Wireless Communications, Vol. 15, No. 9, pp 6321-6341, Sep. 2016..
S. Biswas, C. Masouros and T. Ratnarajah, "Performance Analysis of Large Multi-User MIMO Systems with Space-Constrained 2D Antenna Arrays," IEEE Trans. on Wireless Communications, Vol 15, No. 5, pp. 3492-3505, May 2016.
A. C. Cirik, S. Biswas, S. Vuppala, and T. Ratnarajah, "Robust Transceiver Design for Full Duplex Multi-user MIMO Systems," IEEE Wireless Communications Letters, Vol. 5, No. 3, pp. 260-263, June 2016.
A. C. Cirik, O. Taghizadeh, R. Mathar, T. Ratnarajah, "QoS Considerations for Full Duplex Multi-user MIMO Systems," IEEE Wireless Communications Letters, Vol. 5, No. 1, pp. 36-39, Feb. 2016.
S. M. Raxavi and T. Ratnarajah, "Channel Inversion and Regularization Revisited," Signal Processing, vol. 121, pp 70–80, April 2016.
M. C. Filippou, P. d. Kerret, D. Gesbert, T. Ratnarajah, A. Pastore. G. A. Ropokis, "Coordinated Shared Spectrum Precoding with Distributed CSIT," IEEE Trans on Wireless Communications, Vol. 15, No. 8, pp. 5182-5192, Aug. 2016.
S. Biswas, S.Vuppala, J. Xue and T. Ratnarajah, "On the Performance of Relay Aided Millimeter Wave Networks," IEEE Journal of Selected Topics in Signal Processing (Special Issue on Signal Processing for Millimeter Wave Wireless Communications), Vol. 10, No. 3, pp. 576-588, April 2016.
W. Liu, Z. Ding, T. Ratnarajah, and J. Xue, "On Ergodic Secrecy Capacity of Random Wireless Networks with Protected Zones," IEEE Trans. on Vehicular Technology, Vol. 65, No. 8, pp.6146-6158, Aug. 2016.
S. M. Razavi and T. Ratnarajah, "Adaptive LS and MMSE based Beamformer Design for Multiuser MIMO Interference Channels," IEEE Trans. on Vehicular Technology, Vol. 65, No. 1, pp. 132-144, Jan. 2016.
M-F Hanif, Z. Ding, T. Ratnarajah and G. K. Karagiannidis, "A Minorization-Maximization Method for Optimizing Sum Rate in Non-Orthogonal Multiple Access Systems," IEEE Trans. on Signal Processing, IEEE Trans. on Signal Processing, Vol. 64, No. 1, pp.76-88, Jan. 2016.
E. H. G. Yousif, T.Ratnarajah and M. Sellathurai, "A Frequency Domain Approach to Eigenvalue-Based Detection with Diversity Reception and Spectrum Estimation," IEEE Trans. on Signal Processing, IEEE Trans. on Signal Processing, Vol. 64, No. 1, pp.35-47, Jan. 2016.
J.Xue, T.Ratnarajah, M. Sellathurai and Z. Ding, "Performance Analysis for Multi-Way Relaying in Rician Fading Channels," IEEE Trans on Communications, Vol. 63, No. 11, pp. 4050-4062, Nov. 2015.
L. Zhou, F. H. Khan, T. Ratnarajah and C. B. Papadias, "Achieving Arbitrary Signals Transmission Using a Single Radio Frequency Chain," IEEE Trans on Communications, Vol. 63, No. 12, pp. 4865-4878, Dec. 2015.
E. H. G. Yousif, T.Ratnarajah and M. Sellathurai, "Modeling and Performance Analysis of Multitaper Detection Using Phase-Type Distributions over MIMO Fading Channels," IEEE Trans. on Signal Processing, Vol. 63, No. 22, pp.5882-5896, Nov. 2015.
Y. He, T. Ratnarajah, E H.G. Yousif, J. Xue, M. Sellathurai, "Performance Analysis of Multi-antenna GLRT-Based Spectrum Sensing for Cognitive Radio," Signal Processing, in press, Available online 24 October 2015.
F. A. Khan, H. He, J. Xue and T. Ratnarajah, "Performance Analysis of Cloud Radio Access Networks with Distributed Multiple Antenna Remote Radio Heads" IEEE Trans. on Signal Processing, Vo. 63, No. 18, pp. 4784-4799, Sep. 2015.
A. Papazafeiropoulos and T. Ratnarajah, "Deterministic Equivalent Performance Analysis of Time-Varying Massive MIMO Systems," IEEE Trans. on Wireless Communications, Vol. 14, No. 10, pp. 5795-5809, Oct. 2015.
P. Aquilina and T. Ratnarajah, "Performance analysis of IA techniques in the MIMO IBC with imperfect CSI," IEEE Trans. Communications, Vol 63, No. 4, pp. 1259-1270, April 2015.
Y. Luo and T. Ratnarajah, "Robust Stochastic Optimization For MISO Broadcasting Channel With Delayed CSIT and Limited Transmitting Antenna," IEEE Trans. on Vehicular Technology, Vol. 64, No. 8, pp. 3547-3559-Aug. 2015.
S. M. Razavi and T. Ratnarajah, "Adaptively Regularized Phase Alignment Precoding for Multiuser Multiantenna Downlink," IEEE Trans. on Vehicular Technology, Vol. 64, No. 10, pp. 4863-4869, Oct. 2015.
J. Xue, T. Ratnarajah and C. Zhong, "Error Exponents for Multi-keyhole MIMO Channels," Problems of Information Transmission, Vol. 51, No. 1, pp. 3-22, 2015.
Y. Zhang, J. Xue and T.Ratnarajah, "Error Exponents Analysis of Dual-hop \eta-\mu and \kappa-\mu Fading Channel with Amplify-and-Forward Relaying," IET Communications, Vol. 9, Iss. 11, pp.1367-1379, 2015.
C. Masouros, M. Sellathurai and T. Rantarajah, "Vector Perturbation Based on Symbol Scaling for Limited Feedback MISO Downlinks," IEEE Trans. on Signal Processing, Vol. 63, Issue 3, pp. 562-571, Feb.1, 2014.
L. Li, F. A. Khan, M. Pesavento, T. Ratnarajah, "Sequential Search Based Power Allocation and Beamforming Design in Overlay Cognitive Radio Networks," Signal Processing, Vol. 97, pp. 221-231, April 2014.
C. Zhong, T. Ratnarajah, Z. Zhang, K-K Wong and M. Sellathurai, "Performance of Rayleigh Product MIMO Channels with Linear Receivers," IEEE Trans. on Wireless Communications, pp. 2270-2281, Vol. 13, No. 4, April 2014.
S. M. Razavi and T. Ratnarajah, "Performance Analysis of Interference Alignment Under CSI Mismatch," IEEE Trans on Vehicular Technology, pp. 4740-4748, Vol. 63, Iss. 9, Nov. 2014.
S. M. Razavi, T. Ratnarajah and C. Masouros, "Transmit-Power Efficient Linear Precoding Utilizing Known Interference for the Multiantenna Downlink," IEEE Transac on Vehicular Technology, pp. 4383-4394, Vol. 63, Iss. 9, Nov. 2014.
A. Kortun, T. Ratnarajah, M. Sellathurai, Y-C Liang and Y. Zeng, "On the Eigenvalue Based Spectrum Sensing and Secondary User Throughput," IEEE Trans. on Vehicular Technology, Vol. 60, Issue 3, pp. 1480-1486, March 2014.
C. Masouros, M. Sellathurai and T. Rantarajah, "Maximizing Energy-Efficiency in the Vector Precoded MU-MISO Downlink by Selective Perturbation," IEEE Trans. on Wireless Communications, pp. 4974-4984, Vol. 13, No. 9, Sep. 2014.
J. Xue, T. Ratnarajah, C. Zhong and Chao-Kai Wen, "Reliability Analysis for Large MIMO Systems," IEEE Wireless Communications Letters, Vol. 3, No. 6, pp. 553-556, Dec. 2014.
S. M. Razavi and T. Ratnarajah, "Interference Alignment in K-User MIMO Interference Channels with Partially Coordinated Receivers," IEE Proc. Communications, Vol. 8, Issue 1, pp. 50-57, Jan. 2014.
J. Xue, M. Z. I. Sarkar, and T. Ratnarajah, "Error Exponents for Nakagami-m Fading Channels," Problems of Information Transmission, Vol. 50, No. 2, pp. 144-170, 2014.
H. Du, T. Ratnarajah, M. Sellathurai, and C. B. Papadias, "Reweighted Nuclear Norm Approach for Interference Alignment," IEEE Trans. on Communications, Vol. 61, Issue 9, pp. 3754-3765, Sep. 2013.
C. Masouros, M. Sellathurai and T. Rantarajah, "Large-scale MIMO transmitters in fixed physical spaces: the effect of transmit correlation and mutual coupling," IEEE Trans. on Communications, Vol. 61, No. 7, pp. 2794-2804, July 2013.
S. Ma, H. Du, T. Ratnarajah, and L Dong, "Robust Joint Signal and Interference Alignment in Cognitive Radio Networks with Ellipsoidal CSI Uncertainties," IEE Proc. on Communications, Vol. 7, Issue 13, pp. 1360-1366, Sep. 2013.
C. Masouros, T. Rantarajah, M. Sellathurai, C. B. Papadias and A. Shukla, "Known Interference in the Cellular Downlink: A Performance Limiting Factor or a Source of Green Signal Power?", IEEE Communications Magazine, Vol. 51, Issue 10, pp. 162-171, Oct. 2013.
T. Ratnarajah, C. Masouros, F. Khan, and M. Sellathurai, "Analytical Derivation of Multiuser Diversity Gains with Opportunistic Spectrum Sharing in CR Systems," IEEE Trans. on Communications, Vol. 61, No. 7, pp. 2664-2667, July 2013.
Y. Luo, H. Du, J. Xue, T. Ratnarajah, and D. Wilcox, "On the Performance of Asynchronous Ad-hoc Networks Using Interference Alignment with Renewal Process," IEE Proc. on Communications, Vol. 7, Issue 15, pp. 1628-1637, 2013.
C. Masouros, M. Sellathurai and T. Rantarajah, "Computationally Efficient Vector Perturbation Precoding Using Thresholded Optimization," IEEE Trans. on Communications, Vol. 61, No. 5, pp. 1880-1890, May 2013.
H. Du and T. Ratnarajah, "Robust Utility Maximization and Admission Control for MIMO Cognitive Radio Network," IEEE Trans. on Vehicular Technology, Vol. 62, No. 4, pp. 1707-1718, May 2013.
D. Wilcox, E. Tsakalaki, A. Kortun, T. Ratnarajah, C. B. Papadias and M. Sellathurai, "On Spatial Domain Cognitive Radio Using Single-Radio Parasitic Antenna Arrays," IEEE Journal on Selected Areas in Communications, Vol. 31, No. 3, pp. 571-580, March 2013.
M. Matthaiou, C. Zhong, M. R. McKay and T. Ratnarajah, "Sum Rate Analysis of ZF Receivers in Distributed MIMO Systems," IEEE Journal on Selected Areas in Communications, Vol. 31, No. 2, pp. 180-191, Feb. 2013.
A. Kortun, M. Sellathurai, T. Ratnarajah, and C. Zhong, "Distribution of the Ratio of the Largest Eigenvalue to the Trace of Complex Wishart Matrices," IEEE Trans. on Signal Processing, Vol. 60, No 10, pp. 5527-5532, Oct. 2012.
C. Masouros, M. Sellathurai and T. Rantarajah, "Interference Optimized Tomlinson-Harashima Precoding for Transmit Power Reduction", IEEE Trans. on Signal Processing, Vol. 60, pp. 2470-2481, May 2012.
C. Zhong, T. Ratnarajah, S. Jin, and K-K Wong, "Performance Analysis of Optimal Beamforming in MIMO Dual-Hop AF Systems", IEEE Journal on Selected Areas in Communications, Vol. 30, No. 8, pp. 1415-1427, Sep. 2012.
C. Zhong and T. Ratnarajah, "Performance of User Selection in Cognitive Broadcast Channels", IEEE Trans. on Communications, Vol. 60, No. 12, pp. 3529-3534, Dec 2012.
C. Zhong, T. Ratnarajah, K-K Wong, M-S Alouini, "Effective Capacity of Multiple Antenna Channels: Correlation and Keyhole", IEE Proc. on Communications, Vol. 6, No. 12, pp. 1757-1768, Dec 2012.
F. Khan, C. Masouros and T. Ratnarajah, "Interference Driven Linear Precoding in Multiuser MISO Downlink Cognitive Radio Network," IEEE Trans. On Vehicular Technology, Vol. 61, pp. 2531-2543, June 2012.
M. Z. I. Sarkar and T. Ratnarajah, "Enhancing Security in Correlated Channel with Maximal Ratio Combining Diversity," IEEE Trans. on Signal Processing, Vol. 60, No. 12, pp. 6745-6751, Dec. 2012.
H. Du, T. Ratnarajah, M. Pesavento, C. B. Papadias, "Joint Transceiver Beamforming in MIMO Cognitive Radio Network via Second-Order Cone Programming," IEEE Trans. on Signal Processing, Vol. 60, pp. 781-792, Feb. 2012.
C. Masouros and T. Rantarajah, "Interference as a Source of Green Signal Power in Cognitive Relay Assisted Co-Existing MIMO Wireless Transmissions," IEEE Trans. Communications, Vol. 60, pp. 525-536, Feb. 2012.
J. Xue, C. Zhong and T.Ratnarajah, "Performance Analysis of Orthogonal STBC in Generalized-K Fading MIMO Channels," IEEE Trans on Vehicular Technology, Vol. 61, No. 3, pp. 1473-1479, March 2012.
J. Wu, P. Xiao, M. Sellathurai, S. Blostein and T. Ratnarajah, "Joint Complex Diversity Coding and Channel Coding Over Space, Time and Frequency," IEE Proc. on Signal Processing, Vol. 5, Issue 7, pp. 643-651, 2011.
F. AL-Qahtani, C. Zhong, K. A. Qaraqe, H. Alnuweiri and T. Ratnarajah, "Performance Analysis of Fixed-Gain AF Dual-Hop Relaying Systems over Nakagami-m Fading Channels in the Presence of Interference," EURASIP Journal on Wireless Communications and Networking, pp. 1-10, 2011.
C. Zhong, M Matthaiou, G. K. Karagiannidis and T. Ratnarajah, "Generic Ergodic Capacity Bounds for Fixied-Gain AF Dual-Hop Relaying Systems," IEEE Trans on Vehicular Technology, Vol. 60, No. 8, pp. 3814-3824, Oct. 2011.
M. Matthaiou, C. Zhong and T. Ratnarajah, "Novel Generic Bounds on the Sum Rate of MIMO ZF Receivers," IEEE Trans. on Signal Processing, Vol. 59, Issue 9, pp. 4341-4353, Sep 2011.
C. Zhong, M. R. McKay, T. Ratnarajah and K. K Wong, "Distribution of the Demmel Condition Number of Wishart Matrices," IEEE Trans on Communications, Vol. 59, Issue 5, pp. 1309-1320, May 2011.
C. Zhong, T. Ratnarajah, and K-K Wong, "Outage Analysis of Decode-and-Forward Dual-Hop Systems with Interference Constraint in Nakagami-m Fading Channels," IEEE Trans on Vehicular Technology, Vol. 60, No. 6, pp. 2875-2879, July 2011.
A. Kortun, T. Ratnarajah, M. Sellathurai, C. Zhong and C. Papadias, "On the Performance of Eigenvalue-based Cooperative Spectrum Sensing for Cognitive Radio," IEEE Journal of Selected Topics in Signal Processing, Vol. 5, No. 1, pp. 49-55, Feb. 2011.
C. Zhong, S. Jin, K-K Wong, M-S Alouini, and T. Ratnarajah, "Low SNR Capacity for MIMO Rician and Rayleigh-Product Fading Channels with Single Co-channel Interferer and Noise," IEEE Trans. on Communications, Vol. 58, pp. 2549-2560, Sep. 2010.
C. Zhong, S. Jin, T. Ratnarajah, and K-K Wong, "On the Capacity of Non-uniform Phase MIMO Nakagami-m Fading Channels," IEEE Communications Letters, Vol. 14, No. 6, pp. 536-538, Jun. 2010.
S. Puthusserypady, R. Jue and T.Ratnarajah, "Robust Estimation of HDR in fMRI using H? Filters," IEEE Trans. on Biomedical Engineering, Vol. 57, No. 5, pp. 1133-1142, May 2010.
Y. Gong, Z. Ding, T. Ratnarajah and C. F. N. Cowan, "Turbo Channel Estimation and Equalization for a Superposition-based Cooperative System," IEE Proc. on Communications, Vol. 3, Issue 11, pp. 1790-1799, Nov. 2010.
Z. Ding, T. Ratnarajah and C. Cowan, ''Spectrally Efficient Cooperative Diversity Protocol for Uplink Wireless Transmission,'' IEE Proc. on Signal processing, Vol. 3, Issue 5, pp. 368-380, 2009.
P. Xiao, J. Wu, M. Sellathurai, T. Ratnarajah, and E. G. Strom, "Iterative Multi-User Detection and Decoding for DS-CDMA System with Space-Time Linear Dispersion," IEEE Trans. on Vehicular Technology, Vol. 58, Issue 5, pp. 2343-2353, Jun. 2009.
S. Ahmed, T. Ratnarajah, M. Sellathurai, C.F.N. Cowan, "Iterative Receiver for MIMO-OFDM and their Convergence Behavior," IEEE Trans. on Vehicular Technology, Vol. 58, Issue 1, pp. 461-468, Jan. 2009.
L. G. Barbero, T. Ratnarajah and C. F. N. Cowan, "On the Complexity of the Sphere Decoder for Frequency-Selective MIMO Channels," IEEE Trans. on Signal Processing, Vol. 56, Issue 12, pp. 6031-6043, Dec. 2008.
P. Xiao, L. G. Barbero, M. Sellathurai, and T. Ratnarajah, "On the Uncoded BER Performance Bound of the IEEE 802.16d Channel," IEEE Signal Processing Letter, Vol. 15, pp. 561-564, Dec. 2008.
Z. Ding, T. Ratnarajah and K. K. Leung, "On the Study of Network Coded AF Transmission Protocol for Wireless Multiple Access Channels," IEEE Trans. on Wireless Communications, Vol. 7, Part 2, Issue 11, pp. 4568-4574, Nov. 2008 [cited by 6].
Z. Ding, Y. Gong, T. Ratnarajah and C.F.N. Cowan, "On the performance of opportunistic cooperative wireless networks," IEEE Trans. on Communications, Vol. 56, No. 8, pp. 1236-1240, Aug. 2008 [cited by 27].
Z. Ding, T. Ratnarajah, and C. F. N. Cowan, "HOS-Based Semi-Blind Spatial Equalization for MIMO Rayleigh Fading Channels," IEEE Trans. on Signal Processing, Vol. 56, No. 1, pp. 248-255, Jan. 2008 [cited by 13].
S. Ahmed, T. Ratnarajah, M. Sellathurai and C. Cowan, "Reduced Complexity Iterative Equalization for Severe Time Dispersive MIMO Channels," IEEE Trans. on Vehicular Technology, Vol. 57, No. 1, pp. 594-600, Jan. 2008.
Z. Ding, T. Ratnarajah, C. Cowan, ''On the Diversity-Multiplexing Tradeoff for Wireless Cooperative Multiple Access Systems,'' IEEE Trans. on Signal Processing, Vol. 55, No. 9, pp. 4627-4638, Sep. 2007 [Cited by 54].
T. Ratnarajah, "Limits of Multi-User MIMO Systems Using Scheduling and Rate Feedback," Signal Processing, Vol. 87, Issue 9, pp. 2165-2176, Sep. 2007 [Cited by 4].
S. Puthusserypady and T. Ratnarajah, ''Robust Adaptive Minimization of EOG Artefacts from EEG Signals,'' Signal Processing, Vol. 86, Issue 9, pp. 2351-2363, Sep. 2006 [Cited by 10].
T. Ratnarajah, ''Spatially Correlated Multiple-Antenna Channel Capacity Distributions,'' IEE Proc. on Communications, Vol. 153, No. 2, pp. 263-271, Apr. 2006 [Cited by 8].
S. Puthusserypady and T. Ratnarajah, ''An H-infinity Adaptive Filters for Eye Blink Artefact Minimization from Electroencephalogram,'' IEEE Signal Processing Letter, Vol. 12, No. 12, pp. 816-819, Dec. 2005. [Cited by 18].
T. Ratnarajah and R. Vaillancourt, "Quadratic Forms on Complex Random Matrices and Multiple-Antenna Systems," IEEE Trans. on Information Theory, Vol. 51, No. 8, pp. 2979-2984, Aug. 2005. [Cited by 36].
T. Ratnarajah and R. Vaillancourt, "Complex Singular Wishart Matrices and Applications," Computers & Mathematics with Applications, Vol. 50, Issues 3-4, pp. 399-411, Aug. 2005. [Cited by 28].
T. Ratnarajah, R. Vaillancourt and M. Alvo, "Eigenvalues and Condition Numbers of Complex Random Matrices," SIAM Journal on Matrix Analysis and Applications, Vol. 26, No. 2, pp. 441-456, Jan. 2005 [Cited by 50].
T. Ratnarajah, R. Vaillancourt and M. Alvo, "Complex Random Matrices and Rician Channel Capacity," Problems of Information Transmission, Vol. 41, No. 1, pp. 1-22, Jan. 2005 [Cited by 26].
T. Ratnarajah, R. Vaillancourt and M. Alvo, "Jacobians and Hypergeometric Functions in Complex Multivariate Analysis," Canadian Applied Mathematics Quarterly, Vol. 12, No. 2, pp. 213-239, Summer 2004 [Cited by 10].
T. Ratnarajah, R. Vaillancourt and M. Alvo, "Complex Random Matrices and Applications," Mathematical Reports of the Academy of Science of the Royal Society of Canada, Vol. 25, No. 4, pp. 114-120, Dec. 2003 [cited by 12].
T. Ratnarajah, R. Vaillancourt and M. Alvo, "Complex Random Matrices and Rayleigh Channel Capacity," Communications in Information & Systems, Vol. 3, No. 2, pp. 119-138, Oct 2003 [Cited by 56].
T. Ratnarajah and A. Manikas, "An H Approach to Mitigate the Effects of Array Uncertainties on the MUSIC Algorithm," IEEE Signal Processing Letter, Vol. 5, No. 7, pp. 185-188, Jul. 1998 [Cited by 7].
D. Basnayaka, H. Haas and T. Ratnarajah, "Doppler Effect Assisted Interference Mitigation for Wireless Communication," In Proc. IEEE Global Communications Conference, Abu Dhabi, UAE, 9-13 Dec. 2018.
S. Biswas, K. Singh, O. Taghizadeh and T. Ratnarajah, "QoS-Based Robust Transceiver Design for Coexistence of MIMO Radar and FD MU-MIMO Cellular System," In Proc. IEEE Global Communications Conference, Abu Dhabi, UAE, 9-13 Dec. 2018.
O. Y. Kolawole, A. Papazafeiropoulos and T. Ratnarajah, "A Rate-Splitting Strategy for MU-MIMO Millimeter-Wave Systems with Limited Feedback," In Proc IEEE 19th International Workshop on Signal Processing Advances in Wireless Communications, Kalamata, Greece, June 25-28, 2018.
S. Biswas, K. Singh, and T. Ratnarajah, "Transceiver Design for Spectrum Sharing between FD Cellular System and MIMO Radar," In Proc IEEE 19th International Workshop on Signal Processing Advances in Wireless Communications, Kalamata, Greece, June 25-28, 2018.
A. Gupta, K. Singh, S. Biswas, T. Ratnarajah and M. Sellathurai, "An Energy-Efficient Approach Towards Power Allocation in Non-Orthogonal Multiple Access Full-Duplex AF Relay Systems," In Proc IEEE 19th International Workshop on Signal Processing Advances in Wireless Communications, Kalamata, Greece, June 25-28, 2018.
S. Biswas, K. Singh, O. Taghizadeh, T. Ratnarajah and M. Sellathurai, "Beamforming Design for Full-Duplex Cellular and MIMO Radar Coexistence: A Rate Maximization Approach," In Proc. the IEEE 43rd International Conference on Acoustics, Speech and Signal Processing, Calgary, Alberta, Canada, 15–20 April 2018.
O. Y. Kolawole, A. Papazafeiropoulos and T. Ratnarajah, "Impact of Hardware Impairments on mmW MIMO Systems with Hybrid Precoding," In Proc. the IEEE Wireless Communications and Networking Conference, Barcelona, Spain, 15-18 April 2018.
P. Swami, V. Bhatia, S. Vuppala, T. Ratnarajah "Joint Optimization of Power Allocation and Channel Ratio for offloading in NOMA-HetNets" In Proc. IEEE Global Communications Conference, Abu Dhabi, UAE, 9-13 Dec. 2018 (Workshop - Non-Orthogonal Multiple Access Techniques for 5G).
P. Swami, V. Bhatia, S. Vuppala, T. Ratnarajah "Performance Analysis of Offloading in NOMA-HetNets using Imperfect CSI," In Prof. IEEE International Conference on Advanced Networks and Telecommunications Systems (ANTS), Dec 2018, Indore, India.
A. Papazafeiropoulos and T. Ratnarajah, "Impact of Rate-Splitting Robustness in Multi-Pair Massive MIMO Relay Systems," In Proc. IEEE Global Communications Conference, Singapore, 4-8 Dec. 2017..
F. Liu, C. Masouros, A. Li and T. Ratnarajah, "Radar and Communication Coexistence Enabled by Interference Exploitation," In Proc. IEEE Global Communications Conference, Singapore, 4-8 Dec. 2017..
S. Biswas, S. Vuppala and T. Ratnarajah, "Massive 3D Antenna Array mmWave Systems," In Proc. IEEE Global Communications Conference, Singapore, 4-8 Dec. 2017.
K. Singh, A. Gupta, S. Biswas and T. Ratnarajah, "A Unified Approach Towards Green Resource Allocation in Relay-Assisted Multiuser Networks," In Proc. IEEE Global Communications Conference, Singapore, 4-8 Dec. 2017.
P. Swami, V. Bhatia, S. Vuppala, T. Ratnarajah "User Fairness and Performance Enhancement for Cell Edge User in NOMA-HCN with Offloading," in Proc. IEEE 85th Vehicular Technology Conference (VTC Spring), Portugal, 2017.
P. Swami, V. Bhatia, S. Vuppala, T. Ratnarajah, "Outage Analysis of NOMA-HCN Using Repulsive Point Process," In Proc. IEEE Global Communications Conference, Singapore, 4-8 Dec. 2017 (Workshop - Non-Orthogonal Multiple Access Techniques for 5G).
L. Zhou, F. H. Khan, T. Ratnarajah and C. B. Papadias, "Multi-Antenna Transmission Using ESPAR with Peak Power Constraints," In Proc. 25th European Signal Processing Conference, Kos island, Greece, Aug. 28-Sep. 2, 2017.
A. C. Cirik, S. Biswas, S. Vuppala and T. Ratnarajah, "Energy Efficient Beamforming Design for Full-Duplex MIMO Interference Channels," In Proc. the IEEE International Conference on Communications, Paris, France, May 21-25, 2017.
K. Singh, A. Gupta and T.Ratnarajah, "Efficient Joint Subcarrier and Power Allocation for Achieving Green Multiuser Full-Duplex Decode-and-Forward Relay Networks," In Proc. the IEEE International Conference on Communications, Paris, France, May 21-25, 2017.
K. Singh, A. Gupta and T.Ratnarajah, "Green Resource Allocation and EE-Balancing in Multiuser Two-Way Amplify-and-Forward Relay Networks," In Proc. the IEEE International Conference on Communications, Paris, France, May 21-25, 2017.
P. Aquilina and T. Ratnarajah, "Beamformer Design for Interference Alignment in Full-Duplex Cellular Networks with Imperfect CSI," In Proc. the IEEE International Conference on Communications, Paris, France, May 21-25, 2017.
A. Papazafeiropoulos, B. Clerckx, and T. Ratnarajah, "Mitigation of Phase Noise in Massive MIMO Systems: A Rate-Splitting Approach," In Proc. the IEEE International Conference on Communications, Paris, France, May 21-25, 2017.
S. K. Sharma, A. Papazafeiropoulos, S. Chatzinotas, X. Wang, T. Ratnarajah, "Impact of Residual Transceiver Impairments on MMSE Filtering Performance of Rayleigh-Product MIMO Channels", In Proc IEEE 18th International Workshop on Signal Processing Advances in Wireless Communications, Japan, July 3-6, 2017.
M. Sellathurai, S. Vuppala, T. Ratnarajah, "User selection for multi-beam satellite channels: A stochastic geometry perspective," In the Proc. of 50th Asilomar Conference on Signals, Systems and Computers, Pacific Grove, California, Nov. 4-7, 2016.
H. He, J. Xue, T. Ratnarjah and M. Sellathurai, "Performance Analysis of Millimeter Wave Cloud Radio Access Networks," In Proc. IEEE Global Communications Conference, Washington DC, USA, 4-8 Dec. 2016.
K. Singh, A. Gupta, M-L KU and T. Ratnarjah, "Joint Subcarrier Pairing and Power Allocation for Two-Way Energy-Efficient Relay Networks," In Proc. IEEE Global Communications Conference, Washington DC, USA, 4-8 Dec. 2016.
A. C. Cirik, O Taghizadeh, L. Lampe, and T. Ratnarajah, "A Different Approach in Transceiver Design for Full-Duplex MIMO Systems," In Proc. the IEEE Vehicular Technology Conference, Montréal, Canada, Sep 18-21, 2016.
A. Papazafeiropoulos, S. K. Sharma, S. Chatzinotas, T. Ratnarjah, and B. Ottersten, "Impact of Transceiver Hardware Impairments on the Ergodic Channel Capacity for Rayleigh-Product MIMO Channels," In Proc IEEE 17th International Workshop on Signal Processing Advances in Wireless Communications, Edinburgh, UK, July 3-6, 2016.
E. H. G. Yousif, F. A. Khan, T. Ratnarajah and M. Sellathurai, "On the Spectral Coexistence of Colocated MIMO Radars and Wireless Communications Systems," In Proc IEEE 17th International Workshop on Signal Processing Advances in Wireless Communications, Edinburgh, UK, July 3-6, 2016.
A. C. Cirik, J. Xue, S. Biswas, T. Ratnarjah, and M. Sellathurai, "Transceiver design of Optimum wirelessly powered Full-Duplex MIMO Interference Channel," In Proc IEEE 17th International Workshop on Signal Processing Advances in Wireless Communications, Edinburgh, UK, July 3-6, 2016.
Y. He, J. Xue, T. Ratnarajah, and M. Sellathurai, "Full-Duplex Spectrum Sensing for Multi-Antenna Non-Time-Slotted Cognitive Radio Networks," In Proc IEEE 17th International Workshop on Signal Processing Advances in Wireless Communications, Edinburgh, UK, July 3-6, 2016.
P. Aquilina and T. Ratnarajah, "Degrees of Freedom of Time Correlated MISO Interference Broadcast Channels with Delayed CSIT," In Proc IEEE 17th International Workshop on Signal Processing Advances in Wireless Communications, Edinburgh, UK, July 3-6, 2016.
S. Biswas, C. Masouros and T. Ratnarajah, "On the Energy Efficiency of Massive MIMO with Space-Constrained 2D Antenna Arrays", In Proc. the IEEE International Conference on Communications, Kuala Lumpur, Malaysia, May 23-27, 2016.
E. H. G. Yousif, M. C. Filippou, F. A. Khan, T. Ratnarajah and M. Sellathurai, "New LSA-based Approach for Spectral Coexistence of MIMO Radars and Wireless Communications Systems," In Proc. the IEEE International Conference on Communications, Kuala Lumpur, Malaysia, May 23-27, 2016.
A.C. Cirik, S. Biswas, O. Taghizadeh, A. Liu, and T. Ratnarajah, "Robust Transceiver Design in Full-Duplex MIMO Cognitive Radios," In Proc. the IEEE International Conference on Communications, Kuala Lumpur, Malaysia, May 23-27, 2016.
S. Biswas, S. Vuppala, J. Xue, and T. Ratnarajah, "An Analysis on Relay Assisted Millimeter Wave Networks," In Proc. the IEEE International Conference on Communications, Kuala Lumpur, Malaysia, May 23-27, 2016.
L. Zhou, T. Ratnarajah, J. Xue, and F. A. Khan, "Energy Efficient Cloud Radio Access Network with a Single RF Antenna," In Proc. the IEEE International Conference on Communications, Kuala Lumpur, Malaysia, May 23-27, 2016.
S. Vuppala, S. Biswas, and T. Ratnarajah, "On the Security Region of Best Source Indices in Random Wireless Networks," In Proc. the IEEE International Conference on Communications, Kuala Lumpur, Malaysia, May 23-27, 2016.
S. Vuppala, S. Biswas, T. Ratnarajah, M. Sellathurai, "ANALYSIS OF SECURE COMMUNICATION IN MILLIMETER WAVE NETWORKS: ARE BLOCKAGES BENEFICIAL?," In Proc. the IEEE 41th International Conference on Acoustics, Speech and Signal Processing, Shanghai, China, March 20-25, 2016.
H. He, J. Xue, T. Ratnarajah, F. Khan, C. B. Papadias, "ON THE PERFORMANCE OF CLOUD RADIO ACCESS NETWORKS USING MATERN HARD-CORE POINT PROCESSES'" In Proc. the IEEE 41th International Conference on Acoustics, Speech and Signal Processing, Shanghai, China, March 20-25, 2016.
E. H. G. Yousif, T. Ratnarajah and M. Sellathurai, "Accurate Formulation of the Multitaper-SVD detector over Fading Channels" In Proc. IEEE Global Communications Conference, San Diego, CA, USA, 6-10, Dec. 2015.
A. C. Cirik, K. Rikkinen, Y. Rong and T. Ratnarajah, "A subcarrier and power allocation algorithm for OFDMA full-duplex systems", European Conference on Networks and Communications (EuCNC'2015), Paris, France, June 29-July 2, 2015.
A. Morgado, A. Gomes, V. Frascolla, K. Ntougias, C. B. Papadias, D. Slock, E. Avdic, N. Marchetti, N. Haziza, H. Anouar, Y. Yang, M. Pesavento, F. Khan, T. Ratnarajah, "Dynamic LSA for 5G networks the ADEL perspective", European Conference on Networks and Communications (EuCNC'2015), Paris, France, June 29-July 2, 2015.
P. Aquilina and T. Ratnarajah, "Topological Interference Mangement for Interference Broadcast Channels with Alternating Connectivity," In Proc. the IEEE International Symposium on Information Theory, June 14-19, 2015, Hong Kong.
S. Biswas, J. Xue, F. Khan and T. Ratnarajah, "On the Capacity of Correlated Massive MIMO Systems using Stochastic Geometry," In Proc. the IEEE International Symposium on Information Theory, June 14-19, 2015, Hong Kong.
P. Aquilina and T. Ratnarajah, "Topological Interference Management for Two Cell Interference Broadcast Channels with Alternating Connectivity," In Proc. the IEEE 40th International Conference on Acoustics, Speech and Signal Processing, Brisbane, Australia, April 19-24, 2015.
L. Zhou, F. A. Khan and T. Ratnarajah, "Arbitrary Signal Transmission Using An ESPAR Antenna," In Proc. the IEEE International Conference on Communications, London, UK, June 8-12, 2015.
S. Vuppala, W. Liu, G. Abreu and T. Ratnarajah, "Secrecy Outage of Nakagami-m MISO Channels with Randomly Located Receivers," In Proc. the IEEE International Conference on Communications, London, UK, June 8-12, 2015.
Y. He, J. Xue, T. Ratnarajah and M. Sellathurai, "Cooperative Sensing Technique for Random Secondary Wireless Networks", In Proc. the IEEE International Conference on Communications, London, UK, June 8-12, 2015 (Workshop on Cooperative and Cognitive Networks).
M. C. Filippou, G. A. Ropokis, D. Gesbert, and T. Ratnarajah, "Performance Analysis and Optimization of Hybrid MIMO Cognitive Radio Systems", In Proc. the IEEE International Conference on Communications, London, UK, June 8-12, 2015 (Workshop on MIMO and Cognitive Radio Technologies in Multihop Network).
C. Masouros, M. Sellathurai, and T. Rantarajah, "A Scalable Performance-Complexity Tradeoff for Vector Precoding by Partial Perturbation," in Proc. 16th IEEE International Workshop on Signal Processing Advances in Wireless Communications, Stockholm, Sweden, June 2015.
H. Du, T. Ratnarajah, M. Sellathurai, and J. Chambers, "Mixed Norm Minimization for MIMO Cellular Interference Channel" in Proc. 16th IEEE International Workshop on Signal Processing Advances in Wireless Communications, Stockholm, Sweden, June 2015.
E. H. G. Yousif, T. Ratnarajah and M. Sellathurai, "MIMO-based Multitaper Detection over Nakagami Channels for Dynamic Spectrum Access Devices," in Proc. 16th IEEE International Workshop on Signal Processing Advances in Wireless Communications, Stockholm, Sweden, June 2015.
G. A. Ropokis, C. G. Tsinos, M. C. Filippou, K. Berberidis, D. Gesbert, and T. Ratnarajah, "Joint Power and Sensing Optimization for Hybrid Cognitive Radios with limited CSIT," In Proc. European Wireless, Budapest, Hungary, 20-22 May 2015.
C. Masouros, T. Ratnarajah, M. Sellathurai, "Limited Feedback Vector Perturbation Precoding By MinMax Optimization," In Proc. IEEE Global Communications Conference, Austin, USA, 8-12, Dec. 2014.
C. Masouros, T. Ratnarajah, M. Sellathurai, "Selective Vector Perturbation for Low-Power Small Cell MISO Downlinks," In Proc. IEEE Global Communications Conference, Austin, USA, 8-12, Dec. 2014.
S. M. Razavi and T. Ratnarajah, "Adaptive MMSE-based Beamformer Design for Multiuser MIMO Interference Channels," In Proc. IEEE Global Communications Conference, Austin, USA, 8-12, Dec. 2014.
S. Vuppala, W. Liu, T. Ratnarajah and G. Abreu, "Secrecy Outage Analysis of Cognitive Wireless Sensor Networks," In Proc. Forty-eight Annual Asilomar conference on Signals, Systems, and Computers, Pacific Grove, California, Nov. 2-5, 2014 [Nominated for student paper competition].
Y. Luo and T. Ratnarajah, "Throughput of Two-Tier Heterogeneous Wireless Networks with Interference Coordination," In Proc. IEEE 25 Annual International Symposium on Personal, Indoor and Mobile Radio Communications, Washington D.C., USA, Sep. 02-5, 2014.
S. M. Razavi and T. Ratnarajah, "Adaptive LS-based Beamformer Design for Multiuser MIMO Interference Channels," In Proc. IEEE 25 Annual International Symposium on Personal, Indoor and Mobile Radio Communications, Washington D.C., USA, Sep. 02-5, 2014.
S. M. Razavi and T. Ratnarajah, "Asymptotic Performance Analysis of Channel Inversion under CSI," In Proc. IEEE 25 Annual International Symposium on Personal, Indoor and Mobile Radio Communications, Washington D.C., USA, Sep. 02-5, 2014.
S. M. Razavi and T. Ratnarajah, "Adaptive Channel Regularization for Multiuser Multiantenna Downlink," In Proc. IEEE 25 Annual International Symposium on Personal, Indoor and Mobile Radio Communications, Washington D.C., USA, Sep. 02-5, 2014.
W. Liu, S. Vuppala, G. Abreu and T. Ratnarajah, "Secrecy Outage in Correlated Nakagami-m Fading Channels," In Proc. IEEE 25 Annual International Symposium on Personal, Indoor and Mobile Radio Communications, Washington D.C., USA, Sep. 02-5, 2014.
P. Aquilina, T. Ratnarajah and Dr A. Papazafeiropoulos, "DoF region and sum rate analysis for the K user MIMO IC with limited CSI ," In Proc. IEEE 25 Annual International Symposium on Personal, Indoor and Mobile Radio Communications, Washington D.C., USA, Sep. 02-5, 2014.
S. Biswas, C. Masouros, T. Ratnarajah, "On the effect of Antenna Correlation and Coupling on Energy-Efficiency of Massive MIMO Systems," In Proc. IEEE 25 Annual International Symposium on Personal, Indoor and Mobile Radio Communications, Washington D.C., USA, Sep. 02-5, 2014.
H Du, T. Ratnarajah and M. Sellathurai, "Pareto Optimization for MIMO Interference Channel," In Proc. IEEE 25 Annual International Symposium on Personal, Indoor and Mobile Radio Communications, Washington D.C., USA, Sep. 02-5, 2014.
A. Papazafeiropoulos, H. Q. Ngo, M. Matthaiou and T. Ratnarajah, "Uplink Performance of Conventional and Massive MIMO Cellular Systems with Delayed CSIT," In Proc. IEEE 25 Annual International Symposium on Personal, Indoor and Mobile Radio Communications, Washington D.C., USA, Sep. 02-5, 2014.
L. Zhou, T. Ratnarajah, and J. Xue, "Channel Estimation and Performance Analysis of Beamspace MIMO Systems," European Conference on Networks and Communications (EuCNC'2014), Bologna, Italy, June 23-26, 2014.
W. Liu, M. Z. I. Sarkar and T. Ratnarajah, "On the Security of Cognitive Radio Networks: Cooperative Jamming with Relay Selection," European Conference on Networks and Communications (EuCNC'2014), Bologna, Italy, June 23-26, 2014.
R. Qian, M. Sellathurai and T.Ratnarajah, "Directional Spectrum Sensing for Cognitive Radio Using ESPAR Arrays with a Single RF Chain," European Conference on Networks and Communications (EuCNC'2014), Bologna, Italy, June 23-26, 2014.
E. Yousif and T. Ratnarajah, "FP7 ADEL Project Intermediate Results and Standardization Strategy, " European Conference on Networks and Communications (EuCNC'2014), Bologna, Italy, June 23-26, 2014.
E. H. G. Yousif and T. Ratnarajah, "On the Design and Throughput Analysis of a New MME Detector Using Bartlett's Method" In Proc. the IEEE International Symposium on Information Theory, Honolulu, HI, USA, June 29 - July 4, 2014.
C. Masouros, J. Chen, K. Tong, M. Sellathurai, T. Ratnarjah, "Exploiting Transmit Correlation and Mutual Coupling in MIMO Transmitters," In Proc. of 20th European Wireless Conference, Barcelona, Spain, 14-16 May 2014, Invited Paper.
Y. Luo, H. Du, and T. Ratnarajah, "Robust Beamforming For Two-User MISO Broadcasting Channel with Delayed CSIT", In Proc. on the Eighth IEEE Sensor Array and Multichannel Signal Processing Workshop, June 22-25, A Coruna, Spain [Nominated for student paper competition].
S. M. Razavi and T. Ratnarajah, "Performance Analysis of Max-SINR Algorithm Under CSI Mismatch," In Proc. the IEEE 39th International Conference on Acoustics, Speech and Signal Processing, Florence, Italy, May 4-9, 2014.
A Papazafeiropoulos and T Ratnarajah, "Uplink Performance of Massive MIMO Subject to Delayed CSIT and Anticipated Channel Prediction," In Proc. the IEEE 39th International Conference on Acoustics, Speech and Signal Processing, Florence, Italy, May 4-9, 2014.
Y. He, T. Ratnarajah, J. Xue, E. H. G. Yousif and M. Sellathruai, "Optimal Decision Threshold for Eigenvalue-Based Spectrum Sensing Techniques," In Proc. the IEEE 39th International Conference on Acoustics, Speech and Signal Processing, Florence, Italy, May 4-9, 2014.
C. Masouros, M. Sellathruai and T. Ratnarajah, "Bridging the Gap Between Linear and Non-Linear Precoding in Small- and Large-Scale MIMO Downlinks," In Proc. the IEEE International Conference on Communications, Sydney, Australia, June 10-14, 2014.
S. M. Razavi, T. Ratnarajah and C. Masouros "Regularized Phase Alignment Precoding for the MISO Downlink" In Proc. tenth IEEE International Wireless Communications and Mobile Computing Conference, August 4-8, 2014, Nicosia, Cyprus.
S. M. Razavi and T. Ratnarajah, "Asymptotic Performance Analysis of Interference Alignment Under Imperfect CSI," In Proc. the IEEE Wireless Communications and Networking Conference, Istanbul, Turkey, April 6-9, 2014.
A. Papazafeiropoulos and T. Ratnarajah, "Optimal Degrees of Freedom for the K user MIMO Interference Channel even with Delayed CSIT," In Proc. the IEEE Wireless Communications and Networking Conference, Istanbul, Turkey, April 6-9, 2014.
Y. Luo, A. Papazafeiropoulos and T. Ratnarajah, "Degrees of Freedom Region of MIMO Interference Channel with Imperfect Current and Delayed CSIT," In Proc. the IEEE Wireless Communications and Networking Conference, Istanbul, Turkey, April 6-9, 2014.
A. Papazafeiropoulos and T. Ratnarajah, "Precoding for Downlink Massive MIMO with Delayed CSIT and Channel Prediction," In Proc. the IEEE Wireless Communications and Networking Conference, Istanbul, Turkey, April 6-9, 2014.
A. Papazafeiropoulos and T. Ratnarajah, "Ergodic Channel Capacity for Generalized Fading channels," In Proc. the IEEE Wireless Communications and Networking Conference, Istanbul, Turkey, April 6-9, 2014.
J. Xue, Y. Zhang, M. Z. I. Sarkar and T.Ratnarajah, "Error Exponents Analysis for Dual-hop $\eta$-$\mu$ Fading Channel with Amplify-and-Forward Relaying," In Proc. the IEEE Wireless Communications and Networking Conference, Istanbul, Turkey, April 6-9, 2014.
C. Masouros, T. Ratnarajah, M. Sellathurai, "Low Complexity Vector Precoding for Fast Fading MIMO Downlinks," In Proc. IEEE Global Communications Conference, Atlanta, USA, 9-13, Dec. 2013.
S. M. Razavi and T. Ratnarajah, "Interference Alignment in Partially Coordinated Multipoint Receivers," In Proc. IEEE 24 Annual International Symposium on Personal, Indoor and Mobile Radio Communications, London, UK, Sep. 08-11, 2013.
A. Papazafeiropoulos and T. Ratnarajah, "Degrees of Freedom of Multiple-Antenna Interference Channel with General CSIT," In Proc. IEEE 24 Annual International Symposium on Personal, Indoor and Mobile Radio Communications, London, UK, Sep. 08-11, 2013.
H. Du and T. Ratnarajah, "SINR-Interference Tradeoff Beamforming for MISO Cognitive Radio Network," In Proc. ninth IEEE International Wireless Communications and Mobile Computing Conference, Cagliari, Sardinia, Italy, July 1-5, 2013.
J. Xue, C. Zhong and T. Ratnarajah, "Sum Rate Analysis of K Fading MIMO Channels with Linear MMSE Receiver' In Proc. ninth IEEE International Wireless Communications and Mobile Computing Conference," Cagliari, Sardinia, Italy, July 1-5, 2013.
C. Masouros, T. Rantarajah, M. Sellathurai, J. Chen and T. Kenneth, "Towards Massive-MIMO Transmitters: On The Effects of Deploying Increasing Antennas in Fixed Physical Space", Future Network and MobileSummit, Lisbon, Portugal, 3-5 July 2013.
H. Zhou, S. M. Razavi, T. Ratnarajah, and M. Sellathurai, "Interference Alignment with Doubly Layered Signalling for Constant SISO Interference Channels," In Proc. the IEEE 38th International Conference on Acoustics, Speech and Signal Processing, Vancouver, Canada, May 26-31, 2013.
C. Masouros, T. Ratnarajah, M. Sellathurai, "Complexity Reduction for Vector Precoding Using QoS Requirements" In Proc. the IEEE 38th International Conference on Acoustics, Speech and Signal Processing, Vancouver, Canada, May 26-31, 2013.
H. Du, T. Ratnarajah, M. Sellathurai, and C. B. Papadias, "Robust Interference Alignment Technique for the MIMO Interference Channel with Uncertainties," IEEE ICC'13 - Workshop Beyond LTE-A, Budapest, Hungary, June 9-13, 2013.
H. Du and T. Ratnarajah, "Robust Utility Scheme with Admission Control over MIMO Cognitive Radio Network," IEEE ICC'13 - Workshop CoCoNet5, Budapest, Hungary, June 9-13, 2013.
H. Du and T. Ratnarajah, "Joint Frobenius norm and Reweighted Nuclear Norm Minimization for Interference Alignment," In Proc. the IEEE International Conference on Communications, Budapest, Hungary, June 9-13, 2013.
Y. Luo, H. Du, T. Ratnarajah and D. Wilcox, "Performance of Homogeneous and Asynchronous Ad Hoc Network with Interference Alignment," In Proc. the IEEE International Conference on Communications, Budapest, Hungary, June 9-13, 2013.
J. Xue, M. Z. I. Sarkar, and T. Ratnarajah, "Error Exponents for Rayleigh Fading Multi-keyhole MIMO Channels," In Proc. the IEEE International Conference on Communications, Budapest, Hungary, June 9-13, 2013.
C. Masouros, M. Sellathurai, and T. Rantarajah, "A Performance-Complexity Tradeoff for Vector Perturbation Precoding," In Proc. the IEEE International Conference on Communications, Budapest, Hungary, June 9-13, 2013.
M. Z. I. Sarkar and T. Ratnarajah, "Enhancing Security in the Cognitive Relay Assisted Co-existing Radio Systems with Interferences," In Proc. the IEEE International Conference on Communications, Budapest, Hungary, June 9-13, 2013.
M. Z. I. Sarkar and T. Ratnarajah, "Secrecy Capacity Over Log-normal Fading Channel with Diversity Combining Techniques," In Proc. the IEEE Wireless Communications and Networking Conference, April 7-10, 2013, Shanghai, China.
W. Liu, M. Z. I. Sarkar and T. Ratnarajah, "Combined Approach of Zero Forcing Precoding and Cooperative Jamming: A Secrecy Tradeoff," In Proc. the IEEE Wireless Communications and Networking Conference, April 7-10, 2013, Shanghai, China.
J. Xue, M. Z. I. Sarkar, and T. Ratnarajah, "Error Exponents for Rayleigh Fading Product MIMO Channels," in Proc. IEEE International Symposium on Information Theory (ISIT'12), Cambridge, MA, USA, Jul. 2012.
C. Masouros, M. Sellathurai, and T. Rantarajah, "A Transmit-Power Efficient MIMO-THP Design," in Proc. IEEE International Symposium on Information Theory (ISIT'12), Cambridge, MA, USA, Jul. 2012.
C. Zhong and T. Ratnarajah, "On User Selection in Cognitive Broadcast Channels," In Proc. IEEE International Conference on Wireless Communications and Signal Processing (WCSP'12), Huangshan, China, Oct. 25-27, 2012.
M. Z. I. Sarkar and T. Ratnarajah, "Aspect of Security in the Cognitive Relay Assisted Interference Channels," In Proc. IEEE Workshop on Information Theory, Lausanne, Switzerland, Sep. 03-07, 2012.
S. M. Razavi, T. Ratnarajah, C. Masouros, and M. Sellathurai, "Joint Interference and Phase Alignment in Multiuser MIMO Interference Channels," In Proc. Forty-sixth Annual Asilomar conference on Signals, Systems, and Computers, Pacific Grove, California, Nov. 4-7, 2012.
Y. Luo, H. Du, T. Ratnarajah and D. Wilcox, "Performance Analysis of Ad Hoc Networks with Interference Alignment," In Proc. Forty-sixth Annual Asilomar conference on Signals, Systems, and Computers, Pacific Grove, California, Nov. 4-7, 2012.
H. Du and T. Ratnarajah, "On the Nuclear Norm Approach for Interference Alignment," In Proc. Forty-sixth Annual Asilomar conference on Signals, Systems, and Computers, Pacific Grove, California, Nov. 4-7, 2012.
S. M. Razavi and T. Ratnarajah, "Interference Alignment in Coordinated Multi-Point Systems," In Proc. Forty-sixth Annual Asilomar conference on Signals, Systems, and Computers, Pacific Grove, California, Nov. 4-7, 2012.
A. Kortun, T. Ratnarajah, M. Sellathurai, Y-C Liang and Y. Zeng, "Throughput Analysis Using Eigenvalue Based Spectrum Sensing Under Noise Uncertainty," In Proc. Eight IEEE International Wireless Communications and Mobile Computing Conference (IWCMC), Cyprus, Aug. 27-31, 2012.
J. Xue, M. Z. I. Sarkar, and T. Ratnarajah, "Error Exponents for Nakagami-m Fading MIMO Channels," in Proc. 13th IEEE International Workshop on Signal Processing Advances in Wireless Communications, Cesme, Turkey, Jun. 2012.
S. M. Razavi and T. Ratnarajah, "Enhanced linear precoding in coordinated multicell broadcast systems," in Proc. 13th IEEE International Workshop on Signal Processing Advances in Wireless Communications, Cesme, Turkey, Jun. 2012.
S. M. Razavi and T. Ratnarajah, "Subspace Beamforming via Block SVD for MIMO Systems," in Proc. 13th IEEE International Workshop on Signal Processing Advances in Wireless Communications, Cesme, Turkey, Jun. 2012.
F. Khan, C. Masouros, and T. Rantarajah, "Enhanced Outage Performance With Adaptive Linear Precoding in Cognitive Radio Downlink," In Proc. the IEEE International Conference on Communications, Ottawa, Canada, June 10-15, 2012.
M. Matthaiou, C. Zhong, M. R. McKay, and T. Ratnarajah, "Sum rate analysis of ZF receivers in distributed MIMO systems with Rayleigh/Lognormal Fading," In Proc. the IEEE International Conference on Communications, Ottawa, Canada, June 10-15, 2012.
H. Du and T. Ratnarajah, "Joint Admission Control and Beamforming with Adaptive Modulation for Cognitive Radio network," In Proc. the IEEE International Conference on Communications, Ottawa, Canada, June 10-15, 2012.
J. Xue, M. Z. I. Sarkar and T. Ratnarajah, "Error Exponents for Nakagami-m Fading Keyhole MIMO Channels," In Proc. the IEEE International Conference on Communications, Ottawa, Canada, June 10-15, 2012.
M. Z. I. Sarkar and T. Ratnarajah, "Secrecy Capacity Over Correlated Log-normal Fading Channel," In Proc. the IEEE International Conference on Communications, Ottawa, Canada, June 10-15, 2012.
H. Zhou, D. Wilcox, T. Ratnarajah, M. Sellathurai, "Single Antenna Interference Alignment for Finite Relay Networks," In Proc. International conference on systems, signals and image processing (IWSSIP), Vienna, Austria, April 11-13, 2012.
H. Zhou, M. Sellathurai, C. Mosours, and T. Ratnarjah, "On Dimension Scarcity for User Admission in MIMO Interference Aligned Networks," In Proc. the IEEE Wireless Communications and Networking Conference, April 1-4, 2012, Paris.
J. Xue, M. Z. I. Sarkar, C. Zhong and T. Ratnarajah, "Error Exponents for Orthogonal STBC in Generalized-K Fading MIMO Channels," In Proc. the IEEE Wireless Communications and Networking Conference, April 1-4, 2012, Paris.
H. Du and T. Ratnarajah, "Robust Joint Signal and Interference Alignment for MIMO Cognitive Radio Network," In Proc. the IEEE Wireless Communications and Networking Conference, April 1-4, 2012, Paris.
M. Z. I. Sarkar and T. Ratnarajah, "Bounds on the Secrecy Capacity with Diversity Combining Techniques," In Proc. the IEEE Wireless Communications and Networking Conference, April 1-4, 2012, Paris.
M. Matthaiou, C. Zhong and T. Ratnarajah, "Two Novel Upper Bounds on the Sum Rate of MIMO ZF Receivers", In Proc. IEEE Global Communications Conference, Houston, Texas, USA, 5-9, Dec. 2011.
C. Masouros, F. Khan, M. Sellathurai, and T. Rantarajah, "On the Diversity Gains of User Scheduling in the Cognitive Radio Parallel Access Channel", In Proc. IEEE Global Communications Conference, Houston, Texas, USA, 5-9, Dec. 2011.
C. Zhong and T. Ratnarajah, "Sum Rate Analysis of Rayleigh Product MIMO Channels with Linear MMSE Receiver", In Proc. IEEE International Symposium on Information Theory, Saint-Petersburg, Russia, July 31-Aug. 5, 2011.
C. Zhong, T. Ratnarajah, K-K Wong, and M-S Alouini, "Effective capacity of correlated MISO channels," In Proc. the IEEE International Conference on Communications, Kyoto, Japan, June 5-9, 2011.
C. Masouros and T. Ratnarajah, "Utilization of primary-secondary cross-interference via adaptive precoding in cognitive relay assisted MIMO wireless systems," In Proc. the IEEE International Conference on Communications, Kyoto, Japan, June 5-9, 2011.
Md. Z. I. Sarkar and T. Ratnarajah, "Secure communication through Nakagami-m fading MISO channel," In Proc. the IEEE International Conference on Communications, Kyoto, Japan, June 5-9, 2011.
F. AL-Qahtani, C. Zhong, K. A. Qaraqe, H. Alnuweiri and T. Ratnarajah, "Performance analysis of dual-hop relaying system over Nakagami-m fading channels in the presence of interference," In Proc. the IEEE International Conference on Communications, Kyoto, Japan, June 5-9, 2011.
C. Zhong, K-K Wong, S. Jin, M-S Alouini and T. Ratnarajah, "Asymptotic analysis for Nakagami-m fading channels with relay selection," In Proc. the IEEE International Conference on Communications, Kyoto, Japan, June 5-9, 2011.
Md. Z. I. Sarkar and T. Ratnarajah, "Secrecy capacity and secure outage performance for Rayleigh fading SIMO channel," In Proc. the IEEE 36th International Conference on Acoustics, Speech and Signal Processing, Prague, Czech Republic, May 22-27, 2011.
C. Zhong, T. Ratnarajah, S. Jin, M. Sellathurai, C. Cowan, "Performance analysis of optimal beamforming in MIMO dual-hop amplify-and-forward systems," In Proc. the IEEE 36th International Conference on Acoustics, Speech and Signal Processing, Prague, Czech Republic, May 22-27, 2011.
T. Ratnarajah, C. Zhong, A. Kortun and M. Sellathurai, "Complex random matrices and multiple-antenna spectrum sensing," In Proc. the IEEE 36th International Conference on Acoustics, Speech and Signal Processing, Prague, Czech Republic, May 22-27, 2011.
H. Du and T. Ratnarajah, "Transmit beamforming in MIMO cognitive radio network via semidefinite programming," In Proc. the IEEE Vehicular Technology Conference, Budapest, Hungary, May 14-17, 2011.
J. Xue, Md. Z. I. Sarkar and T. Ratnarajah, "Random coding error exponent for OSTBC Nakagami-m fading MIMO channel," In Proc. the IEEE Vehicular Technology Conference, Budapest, Hungary, May 14-17, 2011.
Md. Z. I. Sarkar and T. Ratnarajah, "Performance analysis of multiple-access channel in the presence of multiple interferers," In Proc. the IEEE Vehicular Technology Conference, Budapest, Hungary, May 14-17, 2011.
L. Li, F. A. Khan, M. Pesavento and T. Ratnarajah, "Power allocation and beamforming in overlay cognitive radio systems," In Proc. the IEEE Vehicular Technology Conference, Budapest, Hungary, May 14-17, 2011.
H. Zhou, T. Ratnarajah and Y-C Liang, "On Secondary Network Interference Alignment in Cognitive Radio," In Proc. The IEEE International Dynamic Spectrum Access Networks (DySPAN) symposium, Aachen, Germany, May 3-6, 2011.
C. Masouros, M. Sellathurai, T. Rantarajah, and Y. C. Liang "Complex Interference Optimization for Power Loss Reduction in MIMO-THP Transmission", In Proc. Forty-fifth Annual Asilomar conference on Signals, Systems, and Computers, Pacific Grove, California, Nov. 6-9, 2011, Invited paper.
Md. Z. I. Sarkar and T. Ratnarajah, "Secure Wireless Multicasting Through Nakagami-m Fading MISO Channel", In Proc. Forty-fifth Annual Asilomar conference on Signals, Systems, and Computers, Pacific Grove, California, Nov. 6-9, 2011.
H. Du, T. Ratnarajah and C. B. Papadias, "Robust Joint Transceiver Beamforming for Cognitive Radio Network", In Proc. Forty-fifth Annual Asilomar conference on Signals, Systems, and Computers, Pacific Grove, California, Nov. 6-9, 2011.
H. Du, T. Ratnarajah, H. Zhou, Y. C. Liang, "Interference Alignment for Peer-to-Peer Underlay MIMO Cognitive Radio Network" In Proc. Forty-fifth Annual Asilomar conference on Signals, Systems, and Computers, Pacific Grove, California, Nov. 6-9, 2011.
C. Masouros, M. Sellathurai, and T. Rantarajah, "Improved Tomlinson-Harashima Precoding with Interference Optimization", In the Proc. 17th International Conference on Digital Signal Processing (DSP2011), Island of Corfu, Greece, July 6-8, 2011.
F. A. Khan, C. Masouros and T. Ratnarajah, "Interference Driven Linear Downlink Precoding Scheme for Multiuser MISO Cognitive Radio Network", 4th International Conference on Cognitive Radio and Advanced Spectrum Management, Barcelona, Spain, Oct. 26-29, 2011, Invited paper.
H. Du and T. Ratnarajah, "Robust Transceiver Beamforming in MIMO Cognitive Radio via Second-Order Cone Programming," In Proc. IEEE 2011 International Conference on Wireless Communications & Signal Processing, Nanjing, China, Nov. 9-11, 2011.
M. Z. I. Sarkar and T. Ratnarajah, "Information-Theoretic Security in Wireless Multicasting," In Proc. 6th IEEE International Conference on Electrical and Computer Engineering (ICECE 2010), Dhaka, 18-20 Dec. 2010.
M. Z. I. Sarkar, T. Ratnarajah, M. Sellathurai and C. F. N. Cowan, "Outage Performance of SIMO Multiple Access Cognitive Radio Channel," In Proc. IEEE Second UK-India-IDRC International Workshop on Cognitive Wireless Systems (UKIWCWS 2010), New Delhi, India, 13-14 Dec., 2010.
F. Khan, T. Ratnarajah, and S. Prakriya, "Outage Analysis of Cognitive Z-Interference Channel with Two-path Cognitive Relaying" In Proc. IEEE Second UK-India-IDRC International Workshop on Cognitive Wireless Systems (UKIWCWS 2010), New Delhi, India, 13-14 Dec., 2010.
C. Zhong, M R McKay, T. Ratnarajah, and K-K Wong, "Distribution of the Demmel Condition Number of Complex Wishart Matrices," In Proc. IEEE Global Communications Conference, Miami, Florida, USA, Dec. 6-10, 2010.
M. Z. I. Sarkar and T. Ratnarajah, "On the Secure Outage Performance for Wireless Multicasting through Slow Fading Channels," In Proc. IEEE Workshop on Information Theory, Dublin, Ireland, Aug. 30-Sep. 3, 2010.
A. Kortun, T. Ratnarajah and M. Sellathurai, "Exact Performance Analysis of Blindly Combined Energy Detection for Spectrum Sensing," In Proc. IEEE 21 Annual International Symposium on Personal, Indoor and Mobile Radio Communications, Istanbul, Turkey, Sep. 26-30, 2010.
C. Zhong, T. Ratnarajah, M. R. McKay and K-K Wong, "Distribution of the Demmel Condition Number of Complex Wishart Matrices" In Proc. IEEE Global Communications Conference, Miami, Florida, USA, Dec. 6-10, 2010.
M. Z. I. Sarkar and T. Ratnarajah, "Secure Communications through Rayleigh Fading SIMO Channel in the Presence of Multiple Eavesdroppers," In Proc. the IEEE International Conference on Communications (ICC 2010), Cape Town, South Africa, May 23-27, 2010.
M. Z. I. Sarkar, T. Ratnarajah and M. Sellathurai, "Outage Performance of MIMO Multiple Access Interference Channel with Cognitive Relay," In Proc. the IEEE International Conference on Communications (ICC 2010), Cape Town, South Africa, May 23-27, 2010.
L. Barbero, Pei Xiao, T. Ratnarajah, M. Sellathurai, "A Sphere Decoder with Approximate QR Decomposition for Frequency-Selective Channels," In Proc. the IEEE International Conference on Communications (ICC 2010), Cape Town, South Africa, May 23-27, 2010.
M. Z. I. Sarkar and T. Ratnarajah, "On the Secrecy Mutual Information of Nakagami-m Fading SIMO Channel," In Proc. the IEEE International Conference on Communications (ICC 2010), Cape Town, South Africa, May 23-27, 2010.
M. Z. I. Sarkar and T. Ratnarajah, "Outage Performance Analysis of SIMO Multiple Access Interference Channels with Cognitive Relay," In Proc. The IEEE International Dynamic Spectrum Access Networks (DySPAN) symposium, Singapore, Apr. 6-9, 2010.
A. Kortun, T. Ratnarajah, M. Sellathurai and C. Zhong, "On the Performance of Eigenvalue-based Spectrum Sensing for Cognitive Radio," In Proc. The IEEE International Dynamic Spectrum Access Networks (DySPAN) symposium, Singapore, Apr. 6-9, 2010.
H. Zhou and T. Ratnarajah, "Novel Interference Draining Scheme for Cognitive Radio based on Interference Alignment," In Proc. The IEEE International Dynamic Spectrum Access Networks (DySPAN) symposium, Singapore, Apr. 6-9, 2010.
S. Ganesan, M. Sellathurai, and T. Ratnarajah, "Opportunistic Interference Projection in Cognitive MIMO Radio with Multiuser Diversity," In Proc. The IEEE International Dynamic Spectrum Access Networks (DySPAN) symposium, Singapore, Apr. 6-9, 2010.
F. Khan, T. Ratnarajah and S. Prakriya, "Outage Performance of Causal Cognitive Radio Z-interference Fading Channel with Cognitive Relaying", In Proc. International Conference on Signal Processing and Communications 2010 (SPCOM 2010), Bangalore India, July 18-21 2010.
F. A. Khan, T. Ratnarajah and M. Sellathurai, "Multiuser Diversity Analysis in Spectrum Sharing Cognitive Radio Networks", In Proc. The 5th International Conference on Cognitive Radio Oriented Wireless Networks and Communications, June 9-11, Cannes, France 2010.
M. Z. I. Sarkar, T. Ratnarajah and M. Sellathurai, "Outage Behavior of MIMO Cognitive Radio Fading Channels: A Causal Approach," In Proc. IEEE First UK-India International Workshop on Cognitive Wireless Systems (UKIWCWS 2009), IIT Delhi, India, December 11-12, 2009.
F. Khan, T. Ratnarajah, M. Sellathurai and Shankar Prakriya, "Outage Analysis of Causal Cognitive Radio Channel," In Proc. IEEE First UK-India International Workshop on Cognitive Wireless Systems (UKIWCWS 2009), IIT Delhi, India, December 11-12, 2009.
S. Ganesan; M. Sellathurai; T. Ratnarajah "Opportunistic Interference Alignment in Cognitive MIMO with Finite Rate Feedback," In Proc. IEEE First UK-India International Workshop on Cognitive Wireless Systems (UKIWCWS 2009), IIT Delhi, India, December 11-12, 2009.
M. Z. I. Sarkar, T. Ratnarajah and M. Sellathurai, "Secure Wireless Multicasting Through Rayleigh Fading Channels-A Secrecy Tradeoff," In Proc. IEEE First UK-India International Workshop on Cognitive Wireless Systems (UKIWCWS 2009), IIT Delhi, India, December 11-12, 2009.
M. Z. I. Sarkar, T. Ratnarajah and M. Sellathurai, "On the Mutual Information of Cognitive Relay Assisted Rayleigh Fading MIMO Channel," In Proc. IEEE First UK-India International Workshop on Cognitive Wireless Systems (UKIWCWS 2009), IIT Delhi, India, December 11-12, 2009.
M. Z. I. Sarkar, T. Ratnarajah, and M Sellathurai, "Secrecy Capacity of Nakagami-m Fading Wireless Channels in the Presence of Multiple Eavesdroppers," In Proc. IEEE Forty-three Annual Asilomar conference on Signals, Systems, and Computers, Pacific Grove, California, Nov. 1-4, 2009.
M. Z. I. Sarkar, T. Ratnarajah, and M Sellathurai, "On the Outage Behavior of Cognitive Relay Assisted MIMO Multiple Access Channel," In Proc. IEEE First International Workshop on Cognitive Wireless Cloud Networks (in conjunction with PIMRC'09), Tokyo, Japan, Sep. 13, 2009 (invited paper).
P. Xiao, J. Wu, M. Sellathurai, and T. Ratnarajah, ''On the Performance of Space-Time Coded Multiuser MIMO Systems with Iterative Receivers,'' In Proc. IEEE Vehicular Technology Conference, Barcelona, April 26-29, 2009.
S. Ganesan, Z. Ding, T. Ratnarajah and M. Sellathurai, "Distributed STBC for Single Carrier Relay-Assisted Transmissions Over Frequency-Selective Channels," In Proc. IEEE International Symposium on Information Theory, Toronto, July 6-11, 2008.
Z. Ding, T. Ratnarajah, Y. Gong and C.F.N. Cowan, "On the Design of Opportunistic Cooperative Transmission Strategies with Partial CSI information," In Proc. IEEE Vehicular Technology Conference, Singapore, May 11-14, 2008.
S. Ahmed, T. Ratnarajah, M. Sellathurai and C.F.N Cowan, "Performance of Iterative MAP Receiver for MIMO-OFDM Channels with Anti-Gray Mapping," In Proc. IEEE Vehicular Technology Conference, Singapore, May 11-14, 2008.
D. Wilcox, M. Sellathurai and T. Ratnarajah, "Subspace methods and spatial diversity in radars," In Proc. IEEE Radar Conference, pp. 1-5, May 26-30, 2008.
P. Xiao, M. Sellathurai, and T. Ratnarajah, "A low complexity scheme for transmit diversity over frequency selective channels," In Proc. IEEE Global Communications Conference, Washington, D.C, USA, 26 - 30 Nov. 2007.
D. Wilcox, M. Sellathurai and T. Ratnarajah, "A Comparison of MIMO and phased array radar withthe application of MUSIC," In Proc. IEEE Fortieth Annual Asilomar conference on Signals, Systems, and Computers, Pacific Grove, California, Nov. 4-7, 2007.
M. Amin, S. Ahmed, H.I. Cantu, V. Fusco and T. Ratnarajah, "The effect of spatial axial ratio variations on QPSK modulation encoded using othogonal phase circularly polarized signals," In Proc. European Microwave Conference, Munich, 8-12 Oct. 2007.
T. Ratnarajah, M. Sellathurai and Z. Ding, ''On the Performance of Cooperative Communication via Best Relay Path,'' In Proc. IEEE 18th Annual International Symposium on Personal, Indoor and Mobile Radio Communications, Athens, Sep. 3-7, 2007.
L. G. Barbero, T. Ratnarajah and C. Cowan, "A multistage sphere decoder for Frequency-Selective MIMO Channels," In Proc. IEEE 18th Annual International Symposium on Personal, Indoor and Mobile Radio Communications, Athens, Sep. 3-7, 2007.
Z. Ding, T. Ratnarajah and C. Cowan, "'A multistage sphere decoder for Frequency-Selective MIMO Channels,"' In Proc. IEEE 18th Annual International Symposium on Personal, Indoor and Mobile Radio Communications, Athens, Sep. 3-7, 2007.
Z. Ding, T. Ratnarajah and C. Cowan, ''Diversity-Multiplexing Tradeoff in Cooperative Multiple Access Channels,'' In Proc. IEEE International Conference on Communications, Glasgow, Scotland, Jun. 24-28, 2007.
S. Ahmed, T. Ratnarajah, M. Sellathurai and C. Cowan, ''EXIT Chart Analysis of a Reduced Complexity Iterative MIMO-OFDM Receiver,'' In Proc. IEEE Vehicular Technology Conference, Dublin, Apr 23-25, 2007.
S. Ahmed, M. Amin, V. Fusco, and T. Ratnarajah ''Direct BPSK Demodulation by Polarization Rotation in the Presence of Channel Noise,'' The third Loughborough Antennas & Propagation Conference, Loughborough, UK, 2-3 Apr. 2007.
T. Ratnarajah, M. Sellathurai and Z. Ding, ''Spectrallt Efficient Cooperative Diversity Protocols for Wireless Networks,'' In Proc. IEEE Fortieth Annual Asilomar conference on Signals, Systems, and Computers, Pacific Grove, California, Oct. 29-Nov. 1, 2006.
S. Ahmed, T. Ratnarajah, M. Sellathurai and C. Cowan ''Low Complexity Iterative Equalization For Severe Time Dispersive MIMO Channels,'' In Proc. IEEE Fortieth Annual Asilomar conference on Signals, Systems, and Computers, Pacific Grove, California, Oct. 29-Nov. 1, 2006.
S. Ahmed, Z. Ding, T. Ratnarajah, C. Cowan, ''Cooperative Transmission Protocol With Full Diversity and Low Complexity Iterative Detection,'' In Proc. IEEE Fortieth Annual Asilomar conference on Signals, Systems, and Computers, Pacific Grove, California, Oct. 29-Nov. 1, 2006.
S. Ahmed, T. Ratnarajah and C.Cowan ''Iterative Equalization For Severe Time Dispersive MIMO Channels,'' In Proc. 14th European Signal Processing Conference, Florence, Italy, Sep. 4-8, 2006.
Y. Gong, Z. Ding, T. Ratnarajah and C. Cowan, ''A Novel Channel Estimator for a Superposition-based Cooperative System,'' In Proc. 14th European Signal Processing Conference, Florence, Italy, Sep. 4-8, 2006.
Z. Ding, T. Ratnarajah, Y. Gong and C. Cowan, ''ICA-Based Semi-Blind Spatial Equalization for MIMO Systems,'' In Proc. 14th European Signal Processing Conference, Florence, Italy, Sep. 4-8, 2006.
M. Sellathurai and T. Ratnarajah, ''Design and Anaysis of Multirate Layered Space-Time Architecture,'' In Proc. IEEE International Symposium on Information Theory, Seattle, Washington, July 7-14, 2006.
T. Ratnarajah and M. Sellathurai, ''Iterative Layered Space-Time Transceiver for ISI Wireless Channels,'' In Proc. IEEE International Conference on Acoustics, Speech, and Signal Processing, Toulouse, France, May 14-19, 2006.
Z. Ding, T. Ratnarajah and C. Cowan, ''Adaptive Semi-blind ICA-Based Spatial Equalization for MIMO Rayleigh Channels with Optimal Step Size,'' In Proc. IEEE International Conference on Acoustics, Speech, and Signal Processing, Toulouse, France, May 14-19, 2006.
M. Sellathurai and T. Ratnarajah, ''Achieving MIMO Channel Capacity Using Multirate Layered Space-Time Coding Architectures,'' In Proc. IEEE Information Theory Workshop on Coding and Complexity, pp. 192-196, Rotorua, New Zealand, Aug. 29 - Sep. 1, 2005.
T. Ratnarajah, "Limits of Multi-User Wireless Systems Using Multiple Antennas, Scheduling and Rate Feedback," In Proc. Thirty-Nine Annual Asilomar conference on Signals, Systems, and Computers, Pacific Grove, California, Oct. 30-Nov. 2, 2005.
T. Ratnarajah, ''Analytical Mutual Information Distribution and Delay-Limited Capacity for Spatially Correlated Multiple-Antenna Systems,'' In Proc. Thirty-Nine Annual Asilomar conference on Signals, Systems, and Computers, Pacific Grove, California, Oct. 30-Nov. 2, 2005.
T. Ratnarajah, ''Complex Singular Wishart Matrices and Multiple-Antenna Systems,'' In Proc. IEEE Workshop on Statistical Signal Processing, July 17-20, 2005, Bordeaux, France.
T. Ratnarajah, "Limits of Multi-User MIMO Systems Using Cross-Layer Processing," In Proc. ITG/IEEE Workshop on Smart Antennas, Duisburg, Germany, Apr. 4-5, 2005.
M. Sellathurai and T. Ratnarajah, "Multirate Diagonal Space-Time Interleaved Coded Modulation for Quasi-Static Fading MIMO Channels," In Proc. ITG/IEEE Workshop on Smart Antennas, Duisburg, Germany, Apr. 4-5, 2005.
T. Ratnarajah and M. Sellathurai, "Turbo-MIMO Transceiver for Frequency-Selective Wireless Channels," In Proc. IEEE Vehicular Technology Conference, Stockholm, Sweden, May 30-Jun.1, 2005.
T. Ratnarajah, "Spatially Correlated MIMO Rician Channel Capacity," In Proc. Thirty-Eight Annual Asilomar Conference on Signals, Systems, and Computers, Pacific Grove, California, pp. 1188-1192, Nov. 7-10, 2004.
T. Ratnarajah and R. Vaillancourt, "Quadratic Forms on Complex Random Matrices and Multiple-Antenna Channel Capacity," In Proc. The Twelfth Annual Workshop on Adaptive Sensor Array Processing, MIT Lincoln Laboratory, Massachusetts, Mar. 16-18, 2004.
T. Ratnarajah and R. Vaillancourt, "Correlated MIMO Channel Capacity," In Proc. Thirty-Seventh Annual Asilomar Conference on Signals, Systems, and Computers, Pacific Grove, California, pp. 1100-1104, Nov. 9-12, 2003.
T. Ratnarajah, Zhi-Quan Luo and K. M. Wong, "Semidefinite Programming Solutions to Robust State Estimation Problem with Model Uncertainties," In Proc. 37th IEEE Conference on Decision and Control, Tampa, Florida, Vol. 1, pp. 275-276, Dec. 1998.
T. Ratnarajah, N. H. Dowlut, Z-Q. Luo and K. M. Wong, "Recursive Delay Estimation and Demodulation of Asynchronous DS-CDMA Signals," In Proc. 9th IEEE Signal Processing Workshop on Statistical Signal and Array Processing, Portland, Oregon, pp. 112-115, Sep. 1998.
T. Ratnarajah, "Mitigating the Effects of Array Uncertainties on the Performance of the MUSIC Algorithm," In Proc. 9th IEEE Signal Processing Workshop on Statistical Signal and Array Processing, Portland, Oregon, pp. 236-239, Sep. 14-16, 1998.
T. Ratnarajah and S. Puthusserypady, "An H Approach to Adaptive Minimization of EOG Artefacts from EEG Signals," In Proc. IEEE Digital Signal Processing Workshop, Bryce Canyon National Park, Utah, Aug. 9-12, 1998.
T. Ratnarajah, "An H Approach to Multi-Source Tracking," In Proc. IEEE International Conference on Acoustics, Speech, and Signal Processing, Seattle, Washington, Vol. 5, pp. 2205-2208, May 1998.
T. Ratnarajah and A. Manikas, "A Robust Signal-Copy Beamformer Using H Estimation," In Proc. Thirtieth Annual Asilomar Conference on Signals, Systems, and Computers, Pacific Grove, California, pp. 551-555, Nov. 3-6, 1996.

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