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: "passive self interference suppression for full duplex infrastructure nodes"
  Abstract: Recent research results have demonstrated the feasibility of full-duplex wireless communication for short-range links. Although the focus of the previous works has been active cancellation of the self-interference signal, a majority of the overall self-interference suppression is often due to passive suppression, i.e., isolation of the transmit and receive antennas. We present a measurement-based study of the capabilities and limitations of three key mechanisms for passive self-interference suppression: directional isolation, absorptive shielding, and cross-polarization. The study demonstrates that more than 70 dB of passive suppression can be achieved in certain environments, but also establishes two results on the limitations of passive suppression: (1) environmental reflections limit the amount of passive suppression that can be achieved, and (2) passive suppression, in general, increases the frequency selectivity of the residual self-interference signal. These results suggest two design implications: (1) deployments of full-duplex infrastructure nodes should minimize near-antenna reflectors, and (2) active cancellation in concatenation with passive suppression should employ higher-order filters or per-subcarrier cancellation.

Connected through hyperedge HE-1 (induced by source paper "multi objective antenna selection in a full duplex base station"):
  with members:
    - "effective capacity of receive antenna selection mimo ostbc systems in co channel interference"
    - "simultaneous bidirectional link selection in full duplex mimo systems"
    - "what will 5g be"
    - "characterization of effective capacity in antenna selection mimo systems"
    - "in band full duplex wireless challenges and opportunities"

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"
    - "widely linear digital self interference cancellation in direct conversion full duplex transceiver"
    - "design and characterization of a full duplex multiantenna system for wifi networks"

Connected through hyperedge HE-3 (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"
    - "in band full duplex wireless challenges and opportunities"
    - "experiment driven characterization of full duplex wireless systems"

Connected through hyperedge HE-4 (induced by source paper "capacity limits of full duplex cellular network"):
  with members:
    - "resource allocation and rate gains in practical full duplex systems"
    - "fundamental limits of spectrum sharing full duplex multicell networks"
    - "opportunistic scheduling for full duplex uplink downlink networks"
    - "in band full duplex wireless challenges and opportunities"
    - "feedback capacity of the gaussian interference channel to within 2 bits"
    - "bilayer low density parity check codes for decode and forward in relay channels"
    - "gaussian interference channel capacity to within one bit"
    - "rate regions for relay broadcast channels"

Connected through hyperedge HE-5 (induced by source paper "robust transceiver design for full duplex decode and forward relay assisted mimo systems"):
  with members:
    - "state space adaptive nonlinear self interference cancellation for full duplex communication"
    - "all digital self interference cancellation technique for full duplex systems"
    - "capacity of the gaussian two hop full duplex relay channel with residual self interference"
    - "multipair full duplex relaying with massive arrays and linear processing"
    - "low complexity end to end performance optimization in mimo full duplex relay systems"
    - "design and characterization of a full duplex multiantenna system for wifi networks"
    - "understanding the impact of phase noise on active cancellation in wireless full duplex"

Connected through hyperedge HE-6 (induced by source paper "robust transceiver design for mimo decode and forward full duplex relay"):
  with members:
    - "state space adaptive nonlinear self interference cancellation for full duplex communication"
    - "all digital self interference cancellation technique for full duplex systems"
    - "multipair full duplex relaying with massive arrays and linear processing"
    - "low complexity end to end performance optimization in mimo full duplex relay systems"
    - "design and characterization of a full duplex multiantenna system for wifi networks"
    - "understanding the impact of phase noise on active cancellation in wireless full duplex"

Connected through hyperedge HE-7 (induced by source paper "scalable group secret key generation over wireless channels"):
  with members:
    - "in band full duplex wireless challenges and opportunities"

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)