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 "pilot based channel estimation design in covert wireless communication"):
  Abstract: In this work, for the first time, we tackle channel estimation design with pilots in the context of covert wireless communication. Specifically, we consider Rayleigh fading for the communication channel from a transmitter to a receiver and additive white Gaussian noise (AWGN) for the detection channel from the transmitter to a warden. Before transmitting information signals, the transmitter has to send pilots to enable channel estimation at the receiver. Using a lower bound on the detection error probability, we first prove that transmitting pilot and information signals with equal power can minimize the detection performance at the warden, which is confirmed by the minimum detection error probability achieved by the optimal detector based on likelihood ratio test. This motivates us to consider the equal transmit power in the channel estimation and then optimize channel use allocation between pilot and information signals in covert wireless communication. Our analysis shows that the optimal number of the channel uses allocated to pilots increases as the covertness constraint becomes tighter. In addition, our examination shows that the optimal percentage of all the available channel uses allocated to channel estimation decreases as the total number of channel uses increases.

Includes members:
  Member "multi antenna covert communications in random wireless networks":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "power efficient irs assisted noma")
  Member "low probability of detection communication opportunities and challenges":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "covert wireless communication in presence of a multi antenna adversary and delay constraints")
  Member "covert transmission with a self sustained relay":
    also connected through other hyperedges:
      (none)
  Member "gaussian signalling for covert communications":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "covert wireless communication in presence of a multi antenna adversary and delay constraints")
  Member "achieving covert wireless communications using a full duplex receiver":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "multi antenna jamming in covert communication")
  Member "multi hop routing in covert wireless networks":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "covert transmission with a self sustained relay")
  Member "joint optimization of a uav s trajectory and transmit power for covert communications":
    also connected through other hyperedges:
      - Hyperedge HE-6 (induced by source paper "latency minimized design of secure transmissions in uav aided communications")
  Member "covert wireless communications with channel inversion power control in rayleigh fading":
    also connected through other hyperedges:
      - Hyperedge HE-7 (induced by source paper "covert wireless communication in presence of a multi antenna adversary and delay constraints")

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)