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: "on secrecy rate of the generalized artificial noise assisted secure beamforming for wiretap channels"
  Abstract: In this paper we consider the secure transmission in fast Rayleigh fading channels with full knowledge of the main channel and only the statistics of the eavesdropper's channel state information at the transmitter. For the multiple-input, single-output, single-antenna eavesdropper systems, we generalize Goel and Negi's celebrated artificial-noise (AN) assisted beamforming, which just selects the directions to transmit AN heuristically. Our scheme may inject AN to the direction of the message, which outperforms Goel and Negi's scheme where AN is only injected in the directions orthogonal to the main channel. The ergodic secrecy rate of the proposed AN scheme can be represented by a highly simplified power allocation problem. To attain it, we prove that the optimal transmission scheme for the message bearing signal is a beamformer, which is aligned to the direction of the legitimate channel. After characterizing the optimal eigenvectors of the covariance matrices of signal and AN, we also provide the necessary condition for transmitting AN in the main channel to be optimal. Since the resulting secrecy rate is a non-convex power allocation problem, we develop an algorithm to efficiently solve it. Simulation results show that our generalized AN scheme outperforms Goel and Negi's, especially when the quality of legitimate channel is much worse than that of eavesdropper's. In particular, the regime with non-zero secrecy rate is enlarged, which can significantly improve the connectivity of the secure network when the proposed AN assisted beamforming is applied.

Connected through hyperedge HE-1 (induced by source paper "physical layer security in the finite blocklength regime over fading channels"):
  with members:
    - "secure and energy efficient transmissions in cache enabled heterogeneous cellular networks performance analysis and optimization"
    - "a survey of physical layer security techniques for 5g wireless networks and challenges ahead"
    - "safeguarding decentralized wireless networks using full duplex jamming receivers"
    - "artificial noise aided secure transmission in large scale spectrum sharing networks"
    - "on the spectral efficiency and security enhancements of noma assisted multicast unicast streaming"
    - "finite blocklength bounds for wiretap channels"
    - "a survey on wireless security technical challenges recent advances and future trends"
    - "enhancing the physical layer security of non orthogonal multiple access in large scale networks"

Connected through hyperedge HE-2 (induced by source paper "secure hybrid digital and analog precoder for mmwave systems with low resolution dacs and finite quantized phase shifters"):
  with members:
    - "energy efficiency of mmwave massive mimo precoding with low resolution dacs"
    - "secure hybrid analog and digital receive beamforming schemes for efficient interference reduction"
    - "hybrid analog and digital beamforming for mmwave ofdm large scale antenna arrays"
    - "alternating minimization algorithms for hybrid precoding in millimeter wave mimo systems"
    - "an overview of signal processing techniques for millimeter wave mimo systems"
    - "an overview of sustainable green 5g networks"
    - "millimeter wave receiver efficiency a comprehensive comparison of beamforming schemes with low resolution adcs"
    - "dynamic subarrays for hybrid precoding in wideband mmwave mimo systems"

Connected through hyperedge HE-3 (induced by source paper "uav swarm enabled aerial comp a physical layer security perspective"):
  with members:
    - "maritime coverage enhancement using uavs coordinated with hybrid satellite terrestrial networks"
    - "uav communications for 5g and beyond recent advances and future trends"
    - "robust trajectory and transmit power design for secure uav communications"
    - "energy efficient uav communication with trajectory optimization"
    - "linear precoding of data and artificial noise in secure massive mimo systems"
    - "wireless communications with unmanned aerial vehicles opportunities and challenges"
    - "on the security of the automatic dependent surveillance broadcast protocol"
    - "joint transmit beamforming and receive power splitting for miso swipt systems"

Connected through hyperedge HE-4 (induced by source paper "channel correlation enabled transmit optimization for miso wiretap channels"):
  with members:
    - "deep learning for iot big data and streaming analytics a survey"
    - "improving physical layer secrecy using full duplex jamming receivers"
    - "outage constrained robust secure transmission for miso wiretap channels"

Connected through hyperedge HE-5 (induced by source paper "an overview of physical layer security with finite alphabet signaling"):
  with members:
    - "a survey of physical layer security techniques for 5g wireless networks and challenges ahead"
    - "physical layer cryptography through massive mimo"
    - "linear precoding of data and artificial noise in secure massive mimo systems"
    - "sum secrecy rate maximization for full duplex two way relay networks using alamouti based rank two beamforming"
    - "performance of lattice coset codes on universal software radio peripherals"
    - "secure m psk communication via directional modulation"
    - "finite blocklength bounds for wiretap channels"
    - "physical layer security in millimeter wave cellular networks"

Connected through hyperedge HE-6 (induced by source paper "beam domain secure transmission for massive mimo communications"):
  with members:
    - "free deterministic equivalents for the analysis of mimo multiple access channel"
    - "linear precoding of data and artificial noise in secure massive mimo systems"
    - "massive mimo ten myths and one critical question"
    - "secure communications in millimeter wave ad hoc networks"
    - "pilot reuse for massive mimo transmission over spatially correlated rayleigh fading channels"
    - "massive mimo for next generation wireless systems"
    - "downlink training techniques for fdd massive mimo systems open loop and closed loop training with memory"
    - "principles of physical layer security in multiuser wireless networks a survey"

Connected through hyperedge HE-7 (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"
    - "exploiting full duplex receivers for achieving secret communications in multiuser miso networks"
    - "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"

Connected through hyperedge HE-8 (induced by source paper "secrecy rate of distributed cooperative mimo in the presence of multi antenna eavesdropper"):
  with members:
    - "cooperative secure transmission by exploiting social ties in random networks"
    - "on secrecy performance of antenna selection aided mimo systems against eavesdropping"
    - "optimal signaling for secure communications over gaussian mimo wiretap channels"
    - "optimization of code rates in sisome wiretap channels"
    - "secure and green swipt in distributed antenna networks with limited backhaul capacity"
    - "power allocation in mimo wiretap channel with statistical csi and finite alphabet input"
    - "on secrecy capacity of fast fading mimome wiretap channels with statistical csit"
    - "full rank solutions for the mimo gaussian wiretap channel with an average power constraint"

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)