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: "full duplex cooperative cognitive radio with transmit imperfections"
  Abstract: This paper studies the cooperation between a primary system and a cognitive system in a cellular network where the cognitive base station (CBS) relays the primary signal using amplify-and-forward or decode-and-forward protocols, and in return it can transmit its own cognitive signal. While the commonly used half-duplex (HD) assumption may render the cooperation less efficient due to the two orthogonal channel phases employed, we propose that the CBS can work in a full-duplex (FD) mode to improve the system rate region. The problem of interest is to find the achievable primary-cognitive rate region by studying the cognitive rate maximization problem. For both modes, we explicitly consider the CBS transmit imperfections, which lead to the residual self-interference associated with the FD operation mode. We propose closed-form solutions or efficient algorithms to solve the problem when the related residual interference power is non-scalable or scalable with the transmit power. Furthermore, we propose a simple hybrid scheme to select the HD or FD mode based on zero-forcing criterion, and provide insights on the impact of system parameters. Numerical results illustrate significant performance improvement by using the FD mode and the hybrid scheme.

Connected through hyperedge HE-1 (induced by source paper "resource allocation for irs assisted full duplex cognitive radio systems"):
  with members:
    - "resource allocation for intelligent reflecting surface assisted cognitive radio networks"
    - "miso wireless communication systems via intelligent reflecting surfaces"
    - "capacity characterization for intelligent reflecting surface aided mimo communication"
    - "resource allocation for secure irs assisted multiuser miso systems"
    - "enabling secure wireless communications via intelligent reflecting surfaces"
    - "channel estimation for intelligent reflecting surface assisted multiuser communications"
    - "multiple antenna technologies for beyond 5g"
    - "towards smart and reconfigurable environment intelligent reflecting surface aided wireless network"

Connected through hyperedge HE-2 (induced by source paper "rate splitting robustness in multi pair massive mimo relay systems"):
  with members:
    - "mitigation of phase noise in massive mimo systems a rate splitting approach"
    - "rate splitting to mitigate residual transceiver hardware impairments in massive mimo systems"
    - "sum rate maximization for linearly precoded downlink multiuser miso systems with partial csit a rate splitting approach"
    - "rate splitting for mimo wireless networks a promising phy layer strategy for lte evolution"
    - "a rate splitting strategy for massive mimo with imperfect csit"
    - "hardware impairments aware transceiver for full duplex massive mimo relaying"
    - "rate analysis of two receiver miso broadcast channel with finite rate feedback a rate splitting approach"
    - "massive mimo with non ideal arbitrary arrays hardware scaling laws and circuit aware design"

Connected through hyperedge HE-3 (induced by source paper "all cognitive mimo a new multiuser detection approach with different priorities"):
  with members:
    - "distributed spatial multiplexing systems with hardware impairments and imperfect channel estimation under rank 1 rician fading channels"
    - "simultaneous spectrum sensing and data reception for cognitive spatial multiplexing distributed systems"
    - "massive mimo ten myths and one critical question"
    - "massive mimo for next generation wireless systems"
    - "cooperative cognitive networks optimal distributed and low complexity algorithms"
    - "effects of channel aging in massive mimo systems"
    - "energy and spectral efficiency of very large multiuser mimo systems"
    - "mimo diversity in the presence of double scattering"

Connected through hyperedge HE-4 (induced by source paper "full duplex cooperative cognitive radio networks with wireless energy harvesting"):
  with members:
    - "cooperative strategies for wireless powered communications"
    - "a discrete time switching protocol for wireless powered communications with energy accumulation"
    - "ergodic capacity comparison of different relay precoding schemes in dual hop af systems with co channel interference"
    - "wireless information and power transfer architecture design and rate energy tradeoff"

Connected through hyperedge HE-5 (induced by source paper "full duplex relay selection in cognitive underlay networks"):
  with members:
    - "all digital self interference cancellation technique for full duplex systems"
    - "rate gain region and design tradeoffs for full duplex wireless communications"
    - "experiment driven characterization of full duplex wireless systems"
    - "a simple cooperative diversity method based on network path selection"

Connected through hyperedge HE-6 (induced by source paper "cooperation in 5g hetnets advanced spectrum access and d2d assisted communications"):
  with members:
    - "underlay spectrum sharing techniques with in band full duplex systems using improper gaussian signaling"

Connected through hyperedge HE-7 (induced by source paper "optimizing df cognitive radio networks with full duplex enabled energy access points"):
  with members:
    - "robust resource allocation for mimo wireless powered communication networks based on a non linear eh model"
    - "wireless powered communication networks an overview"
    - "practical non linear energy harvesting model and resource allocation for swipt systems"
    - "cognitive wireless powered network spectrum sharing models and throughput maximization"
    - "wireless powered cooperative jamming for secrecy multi af relaying networks"
    - "comp meets smart grid a new communication and energy cooperation paradigm"
    - "energy efficient resource allocation for wireless powered communication networks"
    - "joint resource optimization for multicell networks with wireless energy harvesting relays"

Connected through hyperedge HE-8 (induced by source paper "transceiver design to maximize the weighted sum secrecy rate in full duplex swipt systems"):
  with members:
    - "on the spectral efficiency of full duplex small cell wireless systems"
    - "full duplex wireless powered relay with self energy recycling"
    - "secrecy wireless information and power transfer with miso beamforming"
    - "improving physical layer secrecy using full duplex jamming receivers"
    - "resource allocation for secure communication in systems with wireless information and power transfer"
    - "coordinated beamforming for multiuser miso interference channel under rate outage constraints"
    - "self interference cancellation with phase noise induced ici suppression for full duplex systems"
    - "multi objective beamforming for secure communication in systems with wireless information and power transfer"

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)