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: "location based beamforming for enhancing secrecy in rician wiretap channels"
  Abstract: We propose a new optimal location-based beamforming (LBB) scheme for the wiretap channel, where both the main channel and the eavesdropper’s channel are subject to Rician fading. In our LBB scheme, the two key inputs are the location of the legitimate receiver and the location of the potential eavesdropper. Notably, our scheme does not require any channel state information of the main channel or the eavesdropper’s channel being available at the transmitter. This makes our scheme easy to deploy in a host of application settings in which the location inputs are known. Our beamforming solution assumes a multiple-antenna transmitter and a multiple-antenna eavesdropper, and its aim is to maximize the physical layer security of the channel. To obtain our solution, we first derive the secrecy outage probability of the LBB scheme in an easy-to-evaluate expression that is valid for arbitrary real values of the Rician   $K$  -factors of the main channel and the eavesdropper’s channel. Using this expression, we then determine the location-based beamformer solution that minimizes the secrecy outage probability. To assess the usefulness of our new scheme, and to quantify the value of the location information to physical layer security, we compare our scheme to other schemes, some of which do not utilize any location information. Our new beamformer solution provides optimal physical layer security for a wide range of location-based applications.

Connected through hyperedge HE-1 (induced by source paper "secrecy outage and diversity analysis of multiple cooperative source destination pairs"):
  with members:
    - "modulation and multiple access for 5g networks"
    - "physical layer security in heterogeneous networks with jammer selection and full duplex users"
    - "physical layer security for spectrum sharing systems"
    - "on secrecy performance of antenna selection aided mimo systems against eavesdropping"
    - "artificial noise aided secure transmission in large scale spectrum sharing networks"
    - "physical layer security in heterogeneous cellular networks"
    - "secrecy transmit beamforming for heterogeneous networks"
    - "proactive eavesdropping via cognitive jamming in fading channels"

Connected through hyperedge HE-2 (induced by source paper "physical layer security for ultra reliable and low latency communications"):
  with members:
    - "short packet downlink transmission with non orthogonal multiple access"
    - "ultra reliable and low latency communications in 5g downlink physical layer aspects"
    - "ultra reliable low latency cellular networks use cases challenges and approaches"
    - "analysis of short blocklength codes for secrecy"
    - "ber based physical layer security with finite codelength combining strong converse and error amplification"
    - "on stochastic geometry modeling of cellular uplink transmission with truncated channel inversion power control"
    - "on secrecy above secrecy capacity"

Connected through hyperedge HE-3 (induced by source paper "covert communication achieved by a greedy relay in wireless networks"):
  with members:
    - "covert communication in wireless relay networks"
    - "fundamental limits of covert communication over mimo awgn channel"
    - "covert communication in fading channels under channel uncertainty"
    - "covert communication with finite blocklength in awgn channels"
    - "on covert communication with noise uncertainty"
    - "fundamental limits of communication with low probability of detection"
    - "artificial noise aided secure transmission in large scale spectrum sharing networks"
    - "artificial noise aided secure transmission with directional modulation based on random frequency diverse arrays"

Connected through hyperedge HE-4 (induced by source paper "secure precise wireless transmission with random subcarrier selection based directional modulation transmit antenna array"):
  with members:
    - "covert communication in wireless relay networks"
    - "symbol level and multicast precoding for multiuser multiantenna downlink a survey classification and challenges"
    - "the random frequency diverse array a new antenna structure for uncoupled direction range indication in active sensing"
    - "artificial noise aided secure transmission in wiretap channels with transmitter side correlation"
    - "directional modulation via symbol level precoding a way to enhance security"
    - "improving physical layer security in wireless communications using diversity techniques"
    - "relay selection improves the security reliability trade off in cognitive radio systems"
    - "optimization of code rates in sisome wiretap channels"

Connected through hyperedge HE-5 (induced by source paper "wireless security with beamforming technique"):
  with members:
    - "physical layer cryptography through massive mimo"
    - "jamming aided secure communication in massive mimo rician channels"
    - "on the secrecy outage capacity of physical layer security in large scale mimo relaying systems with imperfect csi"
    - "principles of physical layer security in multiuser wireless networks a survey"
    - "energy and spectral efficiency of very large multiuser mimo systems"
    - "rethinking the secrecy outage formulation a secure transmission design perspective"
    - "cooperative jamming for secure communications in mimo relay networks"
    - "robust beamforming for security in mimo wiretap channels with imperfect csi"

Connected through hyperedge HE-6 (induced by source paper "artificial noise aided secure transmission in wiretap channels with transmitter side correlation"):
  with members:
    - "linear precoding of data and artificial noise in secure massive mimo systems"
    - "artificial noise aided secure multi antenna transmission with limited feedback"
    - "achieving secrecy without knowing the number of eavesdropper antennas"
    - "physical layer security for massive mimo an overview on passive eavesdropping and active attacks"
    - "optimization of code rates in sisome wiretap channels"
    - "improving physical layer secrecy using full duplex jamming receivers"
    - "spatially selective artificial noise aided transmit optimization for miso multi eves secrecy rate maximization"
    - "on the design of artificial noise aided secure multi antenna transmission in slow fading channels"

Connected through hyperedge HE-7 (induced by source paper "mitigating pilot contamination through location aware pilot assignment in massive mimo networks"):
  with members:
    - "user load analysis and pilot sequence design for multi cell massive mimo networks"
    - "multi cell multiuser massive mimo networks user capacity analysis and pilot design"
    - "user capacity analysis and pilot design for multi cell multiuser massive mimo networks"
    - "power scaling of uplink massive mimo systems with arbitrary rank channel means"
    - "blind pilot decontamination"
    - "a coordinated approach to channel estimation in large scale multiple antenna systems"
    - "energy and spectral efficiency of very large multiuser mimo systems"
    - "pilot contamination and precoding in multi cell tdd systems"

Connected through hyperedge HE-8 (induced by source paper "location based beamforming and physical layer security in rician wiretap channels"):
  with members:
    - "artificial noise aided secure transmission in large scale spectrum sharing networks"
    - "achieving secrecy without knowing the number of eavesdropper antennas"
    - "jamming aided secure communication in massive mimo rician channels"
    - "location based beamforming for rician wiretap channels"
    - "on the design of artificial noise aided secure multi antenna transmission in slow fading channels"
    - "secure transmission with multiple antennas ii the mimome wiretap channel"
    - "the secrecy capacity of the mimo wiretap 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)