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: "exploiting full duplex receivers for achieving secret communications in multiuser miso networks"
  Abstract: We consider a broadcast channel in which a multi-antenna transmitter (Alice) sends    $K$    confidential information signals to    $K$    legitimate users (Bobs) in the presence of    $L$    eavesdroppers (Eves). Alice uses multiple-input multiple-output (MIMO) precoding to generate the information signals along with her own (Tx-based) friendly jamming (FJ). Interference at each Bob is removed by MIMO zero-forcing. This, however, leaves a “vulnerability region” around each Bob, which can be exploited by a nearby Eve. We address this problem by augmenting Tx-based FJ (TxFJ) with Rx-based FJ (RxFJ), generated by each Bob. Specifically, each Bob uses self-interference suppression to transmit a friendly jamming signal, while simultaneously receiving an information signal over the same channel. We minimize the powers allocated to the information, TxFJ, and RxFJ signals under given guarantees on the individual secrecy rate for each Bob. The problem is solved for the cases when the eavesdropper’s channel state information is known/unknown. Simulations show the effectiveness of the proposed solution. Furthermore, we discuss how to schedule transmissions when the rate requirements need to be satisfied on average rather than instantaneously. Under special cases, a scheduling algorithm that serves only the strongest receivers is shown to outperform the one that schedules all receivers.

Connected through hyperedge HE-1 (induced by source paper "vulnerabilities of massive mimo systems to pilot contamination attacks"):
  with members:
    - "optimal transmit antenna selection for massive mimo wiretap channels"
    - "massive mimo has unlimited capacity"
    - "frequency synchronization for uplink massive mimo systems"
    - "linear precoding of data and artificial noise in secure massive mimo systems"
    - "massive mimo ten myths and one critical question"
    - "individual secrecy for broadcast channels with receiver side information"
    - "5g cellular key enabling technologies and research challenges"
    - "physical layer security in massive mimo"

Connected through hyperedge HE-2 (induced by source paper "a survey of physical layer security techniques for 5g wireless networks and challenges ahead"):
  with members:
    - "secure massive mimo systems with limited rf chains"
    - "secure transmission with large numbers of antennas and finite alphabet inputs"
    - "probabilistically robust swipt for secrecy misome systems"
    - "full duplex bidirectional secure communications under perfect and distributionally ambiguous eavesdropper s csi"
    - "safeguarding decentralized wireless networks using full duplex jamming receivers"
    - "physical layer security aware routing and performance tradeoffs in ad hoc networks"
    - "hybrid procoder and combiner design for secure transmission in mmwave mimo systems"
    - "transceiver design to maximize the weighted sum secrecy rate in full duplex swipt systems"

Connected through hyperedge HE-3 (induced by source paper "a new design paradigm for secure full duplex multiuser systems"):
  with members:
    - "secure transmission with large numbers of antennas and finite alphabet inputs"
    - "joint fractional time allocation and beamforming for downlink multiuser miso systems"
    - "secure massive mimo transmission with an active eavesdropper"
    - "a general mimo framework for noma downlink and uplink transmission based on signal alignment"
    - "multi objective optimization for robust power efficient and secure full duplex wireless communication systems"
    - "robust beamforming for secure communication in systems with wireless information and power transfer"
    - "on the spectral efficiency of full duplex small cell wireless systems"
    - "secrecy wireless information and power transfer with miso beamforming"

Connected through hyperedge HE-4 (induced by source paper "adaptive full duplex jamming receiver for secure d2d links in random networks"):
  with members:
    - "secrecy outage analysis for downlink transmissions in the presence of randomly located eavesdroppers"
    - "modeling and analysis of cellular networks using stochastic geometry a tutorial"
    - "safeguarding decentralized wireless networks using full duplex jamming receivers"
    - "physical layer security in heterogeneous networks with jammer selection and full duplex users"
    - "physical layer security in heterogeneous cellular networks"
    - "a survey on device to device communication in cellular networks"
    - "passive self interference suppression for full duplex infrastructure nodes"
    - "improving physical layer secrecy using full duplex jamming receivers"

Connected through hyperedge HE-5 (induced by source paper "secrecy energy efficiency of mimome wiretap channels with full duplex jamming"):
  with members:
    - "multi tenant c ran with spectrum pooling downlink optimization under privacy constraints"
    - "softnull many antenna full duplex wireless via digital beamforming"
    - "a survey of energy efficient techniques for 5g networks and challenges ahead"
    - "hardware impairments aware transceiver for full duplex massive mimo relaying"
    - "multi objective optimization for robust power efficient and secure full duplex wireless communication systems"
    - "joint design of optimal cooperative jamming and power allocation for linear precoding"
    - "robust beamforming for secure communication in systems with wireless information and power transfer"
    - "passive self interference suppression for full duplex infrastructure nodes"

Connected through hyperedge HE-6 (induced by source paper "physical layer security in heterogeneous networks with jammer selection and full duplex users"):
  with members:
    - "power allocation for secure swipt systems with wireless powered cooperative jamming"
    - "hybrid duplex switching in heterogeneous networks"
    - "opportunistic jamming for enhancing security stochastic geometry modeling and analysis"
    - "physical layer security in millimeter wave cellular networks"
    - "a survey on wireless security technical challenges recent advances and future trends"
    - "physical layer security in heterogeneous cellular networks"
    - "secure communication in uplink transmissions user selection and multiuser secrecy gain"
    - "secure routing in multihop wireless ad hoc networks with decode and forward relaying"

Connected through hyperedge HE-7 (induced by source paper "secure communications for the two user broadcast channel with random traffic"):
  with members:
    - "wiretap channels nonasymptotic fundamental limits"
    - "on secrecy metrics for physical layer security over quasi static fading channels"
    - "probabilistic cooperation of a full duplex relay in random access networks"
    - "finite blocklength bounds for wiretap channels"
    - "stable throughput region of the two user broadcast channel"
    - "the stability region of the two user broadcast channel"
    - "throughput analysis for full duplex wireless networks with imperfect self interference cancellation"
    - "fundamental limits of caching with secure delivery"

Connected through hyperedge HE-8 (induced by source paper "fundamental properties of full duplex radio for secure wireless communications"):
  with members:
    - "safeguarding decentralized wireless networks using full duplex jamming receivers"
    - "principles of physical layer security in multiuser wireless networks a survey"
    - "improving physical layer secrecy using full duplex jamming receivers"

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)