human: Given a node-centered hypergraph: <hypergraph>, where nodes represent papers and hyperedges represent sets of papers co-cited by a source paper.

Details of the hypergraph:
Center node: "asymptotic capacity and optimal precoding in mimo multi hop relay networks"
  Abstract: A multihop relaying system is analyzed where data sent by a multi-antenna source is relayed by successive multi-antenna relays until it reaches a multi-antenna destination. Assuming correlated fading at each hop, each relay receives a faded version of the signal from the previous level, performs linear precoding and retransmits it to the next level. Using free probability theory and assuming that the noise power at relays- but not at destination- is negligible, the closed-form expression of the asymptotic instantaneous end-to-end mutual information is derived as the number of antennas at all levels grows large. The so-obtained deterministic expression is independent from the channel realizations while depending only on channel statistics. This expression is also shown to be equal to the asymptotic average end-to-end mutual information. The singular vectors of the optimal precoding matrices, maximizing the average mutual information with finite number of antennas at all levels, are also obtained. It turns out that these vectors are aligned to the eigenvectors of the channel correlation matrices. Thus, they can be determined using only the channel statistics. As the structure of the singular vectors of the optimal precoders is independent from the system size, it is also optimal in the asymptotic regime.

Connected through hyperedge HE-1 (induced by source paper "average sep optimal precoding for correlated massive mimo with zf detection an asymptotic analysis"):
  with members:
    - "large scale fading decoding in cellular massive mimo systems with spatially correlated channels"
    - "massive mimo has unlimited capacity"
    - "performance analysis for massive mimo downlink with low complexity approximate zero forcing precoding"
    - "joint pilot design and uplink power allocation in multi cell massive mimo systems"
    - "the world s first real time testbed for massive mimo design implementation and validation"
    - "power scaling of uplink massive mimo systems with arbitrary rank channel means"
    - "pilot beam pattern design for channel estimation in massive mimo systems"
    - "massive mimo systems with non ideal hardware energy efficiency estimation and capacity limits"

Connected through hyperedge HE-2 (induced by source paper "supervised learning for multi hop mu mimo communications with one bit transceivers"):
  with members:
    - "one bit ofdm receivers via deep learning"
    - "ofdm autoencoder for end to end learning of communications systems"
    - "multipair massive mimo relaying systems with one bit adc s and dac s"
    - "one bit sphere decoding for uplink massive mimo systems with one bit adcs"
    - "an introduction to deep learning for the physical layer"
    - "channel estimation and performance analysis of one bit massive mimo systems"
    - "detection algorithms for communication systems using deep learning"
    - "channel estimation in broadband millimeter wave mimo systems with few bit adcs"

Connected through hyperedge HE-3 (induced by source paper "asymptotic performance analysis of a k hop amplify and forward relay mimo channel"):
  with members:
    - "asymptotic analysis of su mimo channels with transmitter noise and mismatched joint decoding"
    - "large system analysis of correlated mimo multiple access channels with arbitrary signaling in the presence of interference"
    - "ergodic capacity analysis of amplify and forward mimo dual hop systems"
    - "a typical reconstruction limit of compressed sensing based on lp norm minimization"
    - "tight bounds on the capacity of binary input random cdma systems"
    - "asymptotic analysis of general multiuser detectors in mimo ds cdma channels"
    - "vector precoding for wireless mimo systems and its replica analysis"
    - "asymptotic mutual information statistics of separately correlated rician fading mimo channels"

Connected through hyperedge HE-4 (induced by source paper "capacity and power scaling laws for finite antenna mimo amplify and forward relay networks"):
  with members:
    - "asymptotic performance analysis of a k hop amplify and forward relay mimo channel"
    - "capacity approximations for gaussian relay networks"
    - "ergodic capacity analysis of amplify and forward mimo dual hop systems"
    - "on information rates of the fading wyner cellular model via the thouless formula for the strip"
    - "diversity of mimo multihop relay channels"
    - "crystallization in large wireless networks"
    - "hierarchical cooperation achieves optimal capacity scaling in ad hoc networks"

Connected through hyperedge HE-5 (induced by source paper "outage capacity of rayleigh product channels a free probability approach"):
  with members:
    - "from multi keyholes to measure of correlation and power imbalance in mimo channels outage capacity analysis"
    - "living at the edge a large deviations approach to the outage mimo capacity"
    - "asymptotic analysis of double scattering channels"
    - "finite snr diversity multiplexing tradeoff via asymptotic analysis of large mimo systems"
    - "diversity multiplexing tradeoff of double scattering mimo channels"
    - "capacity and character expansions moment generating function and other exact results for mimo correlated channels"
    - "approximately universal codes over slow fading channels"

Connected through hyperedge HE-6 (induced by source paper "on the capacity of block multiantenna channels"):
  with members:
    - "massive mimo for next generation wireless systems"
    - "a deterministic equivalent for the analysis of correlated mimo multiple access channels"

Connected through hyperedge HE-7 (induced by source paper "on the outage capacity of orthogonal space time block codes over multi cluster scattering mimo channels"):
  with members:
    - "from multi keyholes to measure of correlation and power imbalance in mimo channels outage capacity analysis"

Connected through hyperedge HE-8 (induced by source paper "a tutorial on the optimization of amplify and forward mimo relay systems"):
  with members:
    - "power allocation in two hop amplify and forward mimo relay systems with qos requirements"
    - "transceiver design for dual hop nonregenerative mimo ofdm relay systems under channel uncertainties"
    - "achievable rate regions for bi directional relaying"
    - "diversity of mimo multihop relay channels"
    - "optimal space time codes for the mimo amplify and forward cooperative channel"

Question: Please tell me which class the center node belongs to. The 40 classes are: cs.NA(Numerical Analysis), cs.MM(Multimedia), cs.LO(Logic in Computer Science), cs.CY(Computers and Society), cs.CR(Cryptography and Security), cs.DC(Distributed, Parallel, and Cluster Computing), cs.HC(Human-Computer Interaction), cs.CE(Computational Engineering, Finance, and Science), cs.NI(Networking and Internet Architecture), cs.CC(Computational Complexity), cs.AI(Artificial Intelligence), cs.MA(Multiagent Systems), cs.GL(General Literature), cs.NE(Neural and Evolutionary Computing), cs.SC(Symbolic Computation), cs.AR(Hardware Architecture), cs.CV(Computer Vision and Pattern Recognition), cs.GR(Graphics), cs.ET(Emerging Technologies), cs.SY(Systems and Control), cs.CG(Computational Geometry), cs.OH(Other Computer Science), cs.PL(Programming Languages), cs.SE(Software Engineering), cs.LG(Machine Learning), cs.SD(Sound), cs.SI(Social and Information Networks), cs.RO(Robotics), cs.IT(Information Theory), cs.PF(Performance), cs.CL(Computation and Language), cs.IR(Information Retrieval), cs.MS(Mathematical Software), cs.FL(Formal Languages and Automata Theory), cs.DS(Data Structures and Algorithms), cs.OS(Operating Systems), cs.GT(Computer Science and Game Theory), cs.DB(Databases), cs.DL(Digital Libraries), cs.DM(Discrete Mathematics). Directly output the class name.

gpt: cs.IT(Information Theory)