human: Given a hyperedge-centered hypergraph: <hypergraph>, where the center hyperedge is induced by one source paper and its member nodes are the cited papers.

Details of the hypergraph:
Center hyperedge (induced by source paper "artificial noise aided secure transmission with directional modulation based on random frequency diverse arrays"):
  Abstract: In this paper, we propose a novel directional modulation (DM) scheme based on random frequency diverse arrays with artificial noise (RFDA-DM-AN) to enhance physical layer security of wireless communications. Specifically, we first design the RFDA-DM-AN scheme by randomly allocating frequencies to transmit antennas, thereby achieving two-dimensionally (i.e., angle and range) secure transmissions, and outperforming the state-of-the-art one-dimensional (i.e., angle) phase array (PA) based DM scheme. Then we develop the closed-form expression of a lower bound on the ergodic secrecy capacity (ESC) of our RFDA-DM-AN scheme. Based on the theoretical lower bound derived, we further optimize the transmission power allocation between the useful signal and artificial noise (AN) in order to enhance the ESC. Simulation results show that 1) our RFDA-DM-AN scheme achieves a higher secrecy capacity than that of the PA based DM scheme, 2) the lower bound derived is shown to approach the ESC as the number of transmit antennas N increases and precisely matches the ESC when N is sufficiently large, and 3) the proposed optimum power allocation achieves the highest ESC compared with other power allocations in the RFDA-DM-AN.

Includes members:
  Member "the random frequency diverse array a new antenna structure for uncoupled direction range indication in active sensing":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "secure precise wireless transmission with random subcarrier selection based directional modulation transmit antenna array")
  Member "on secrecy metrics for physical layer security over quasi static fading channels":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "on secure transmission design an information leakage perspective")
  Member "location based beamforming for enhancing secrecy in rician wiretap channels":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "secrecy outage and diversity analysis of multiple cooperative source destination pairs")
  Member "secrecy wireless information and power transfer challenges and opportunities":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "downlink secrecy rate of one bit massive mimo system with active eavesdropping")
  Member "improving physical layer security in wireless communications using diversity techniques":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "jamming assisted eavesdropping over parallel fading channels")
  Member "optimization of code rates in sisome wiretap channels":
    also connected through other hyperedges:
      - Hyperedge HE-6 (induced by source paper "covert wireless communications with channel inversion power control in rayleigh fading")
  Member "wireless physical layer security with imperfect channel state information a survey":
    also connected through other hyperedges:
      - Hyperedge HE-7 (induced by source paper "blind channel separation in massive mimo system under pilot spoofing and jamming attack")

Question: Please tell me which class the source paper 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)