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: "experiment driven characterization of full duplex wireless systems"
  Abstract: We present an experiment-based characterization of passive suppression and active self-interference cancellation mechanisms in full-duplex wireless communication systems. In particular, we consider passive suppression due to antenna separation at the same node, and active cancellation in analog and/or digital domain. First, we show that the average amount of cancellation increases for active cancellation techniques as the received self-interference power increases. Our characterization of the average cancellation as a function of the self-interference power allows us to show that for a constant signal-to-interference ratio at the receiver antenna (before any active cancellation is applied), the rate of a full-duplex link increases as the self-interference power increases. Second, we show that applying digital cancellation after analog cancellation can sometimes increase the self-interference, and thus digital cancellation is more effective when applied selectively based on measured suppression values. Third, we complete our study of the impact of self-interference cancellation mechanisms by characterizing the probability distribution of the self-interference channel before and after cancellation.

Connected through hyperedge HE-1 (induced by source paper "simultaneous downlink data transmission and uplink channel estimation with reduced complexity full duplex mimo radios"):
  with members:
    - "joint design of multi tap analog cancellation and digital beamforming for reduced complexity full duplex mimo systems"
    - "sequential beamforming for multiuser mimo with full duplex training"
    - "in band full duplex wireless challenges and opportunities"
    - "mimo broadcast channels with finite rate feedback"

Connected through hyperedge HE-2 (induced by source paper "state space adaptive nonlinear self interference cancellation for full duplex communication"):
  with members:
    - "simultaneous transmit and receive operation in next generation ieee 802 11 wlans a mac protocol design approach"
    - "multi tap digital canceller for full duplex applications"
    - "accumulate and jam towards secure communication via a wireless powered full duplex jammer"
    - "full duplex relaying in mimo ofdm frequency selective channels with optimal adaptive filtering"
    - "wideband self adaptive rf cancellation circuit for full duplex radio operating principle and measurements"
    - "all digital self interference cancellation technique for full duplex systems"
    - "passive self interference suppression for full duplex infrastructure nodes"
    - "widely linear digital self interference cancellation in direct conversion full duplex transceiver"

Connected through hyperedge HE-3 (induced by source paper "energy efficient optimization of wireless powered 5g full duplex cellular networks a mean field game approach"):
  with members:
    - "tradeoff between delay and physical layer security in wireless networks"
    - "distributed user association in energy harvesting small cell networks a probabilistic bandit model"
    - "ultra dense small cell networks turning density into energy efficiency"
    - "toward a tractable delay analysis in ultra dense networks"
    - "fronthauling for 5g lte u ultra dense cloud small cell networks"
    - "heterogeneous cellular networks with spatio temporal traffic delay analysis and scheduling"
    - "5g ultra dense cellular networks"
    - "energy harvesting small cell networks feasibility deployment and operation"

Connected through hyperedge HE-4 (induced by source paper "energy efficiency maximization via joint sub carrier assignment and power control for ofdma full duplex networks"):
  with members:
    - "energy efficient power control a look at 5g wireless technologies"
    - "optimal joint power and subcarrier allocation for full duplex multicarrier non orthogonal multiple access systems"
    - "energy efficient heterogeneous cellular networks with spectrum underlay and overlay access"
    - "power efficient resource allocation for full duplex radio distributed antenna networks"
    - "throughput analysis for full duplex wireless networks with imperfect self interference cancellation"
    - "power efficient and secure full duplex wireless communication systems"
    - "energy efficient scheduling and power allocation in downlink ofdma networks with base station coordination"
    - "full duplex mobile device pushing the limits"

Connected through hyperedge HE-5 (induced by source paper "rate splitting for massive mimo multi carrier system using full duplex decode and forward relay with hardware impairments"):
  with members:
    - "rate splitting robustness in multi pair massive mimo relay systems"
    - "hardware impairments aware transceiver design for bidirectional full duplex mimo ofdm systems"
    - "optimal joint power and subcarrier allocation for full duplex multicarrier non orthogonal multiple access systems"
    - "massive mimo enabled full duplex cellular networks"
    - "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"
    - "passive self interference suppression for full duplex infrastructure nodes"
    - "in band full duplex wireless challenges and opportunities"

Connected through hyperedge HE-6 (induced by source paper "performance analysis and enhancements for in band full duplex wireless local area networks"):
  with members:
    - "rcfd a novel channel access scheme for full duplex wireless networks based on contention in time and frequency domains"
    - "performance analysis of csma ca based medium access in full duplex wireless communications"
    - "all digital self interference cancellation technique for full duplex systems"
    - "full duplex mac protocol design and analysis"
    - "design and characterization of a full duplex multiantenna system for wifi networks"
    - "self interference cancellation with nonlinear distortion suppression for full duplex systems"
    - "in band full duplex wireless challenges and opportunities"

Connected through hyperedge HE-7 (induced by source paper "non orthogonal multiple access for 5g and beyond"):
  with members:
    - "downlink non orthogonal multiple access with limited feedback"
    - "optimal user scheduling and power allocation for millimeter wave noma systems"
    - "coordinated multi point comp transmission in downlink multi cell noma systems models and spectral efficiency performance"
    - "low complexity receiver for multi level polar coded modulation in non orthogonal multiple access"
    - "massive non orthogonal multiple access for cellular iot potentials and limitations"
    - "power domain non orthogonal multiple access noma in 5g systems potentials and challenges"
    - "modulation and multiple access for 5g networks"
    - "robust beamforming techniques for non orthogonal multiple access systems with bounded channel uncertainties"

Connected through hyperedge HE-8 (induced by source paper "covert wireless communications with channel inversion power control in rayleigh fading"):
  with members:
    - "gaussian signalling for covert communications"
    - "achieving covert wireless communications using a full duplex receiver"
    - "adaptive full duplex jamming receiver for secure d2d links in random networks"
    - "covert communication in wireless relay networks"
    - "covert communication achieved by a greedy relay in wireless networks"
    - "covert wireless communication with a poisson field of interferers"
    - "covert communication in fading channels under channel uncertainty"
    - "covert communications with a full duplex receiver over wireless fading channels"

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)