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 "robustness of low complexity massive mimo architectures against passive eavesdropping"):
  Abstract: Invoking large transmit antenna arrays, massive MIMO wiretap settings are capable of suppressing passive eavesdroppers via narrow beamforming towards legitimate terminals. This implies that secrecy is obtained almost for free in these settings. We show that this property holds not only for fully digital MIMO architectures, but also in massive MIMO settings whose transmitters employ architectures with reduced complexity. The investigations consider two dominant approaches for complexity reduction, namely antenna selection and hybrid analog-digital precoding. We show that using either approach, the information leakage normalized by the achievable sum-rate vanishes as the transmit array size grows large. For both approaches, the decaying speed is determined. The results demonstrate that, as the transmit array size grows large, the normalized leakages obtained by antenna selection and hybrid analog-digital precoding converge to zero double-logarithmically and logarithmically, respectively. These analytic derivations are confirmed for various benchmark architectures through numerical investigations.

Includes members:
  Member "papr limited precoding in massive mimo systems with reflect and transmit array antennas":
    also connected through other hyperedges:
      (none)
  Member "on robustness of massive mimo systems against passive eavesdropping under antenna selection":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "secure regularized zero forcing for multiuser mimome channels")
  Member "glse precoders for massive mimo systems analysis and applications":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "secure regularized zero forcing for multiuser mimome channels")
  Member "stepwise transmit antenna selection in downlink massive multiuser mimo":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "millimeter wave massive mimo systems relying on generalized sub array connected hybrid precoding")
  Member "scalable and energy efficient millimeter massive mimo architectures reflect array and transmit array antennas":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "a single rf architecture for multiuser massive mimo via reflecting surfaces")
  Member "optimal transmit antenna selection for massive mimo wiretap channels":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "vulnerabilities of massive mimo systems to pilot contamination attacks")
  Member "asymptotics of nonlinear lse precoders with applications to transmit antenna selection":
    also connected through other hyperedges:
      - Hyperedge HE-6 (induced by source paper "secure regularized zero forcing for multiuser mimome channels")
  Member "asymptotics of transmit antenna selection impact of multiple receive antennas":
    also connected through other hyperedges:
      - Hyperedge HE-7 (induced by source paper "glse precoders for massive mimo systems analysis and applications")

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)