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 "low complexity mimo precoding with discrete signals and statistical csi"):
  Abstract: In this paper, we investigate the design of multiple-input multiple-output single-user precoders for finite-alphabet signals under the premise of statistical channel-state information at the transmitter. Based on an asymptotic expression for the mutual information of channels exhibiting antenna correlations, we propose a low-complexity iterative algorithm that radically reduces the computational load of existing approaches by orders of magnitude with only minimal losses in performance. The savings increase with the number of transmit antennas and with the cardinality of the signal alphabet, making it possible to supports values thereof that were unwieldy in existing solutions.

Includes members:
  Member "linear precoding for mimo channels with qam constellations and reduced complexity":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "low complexity mimo precoding for finite alphabet signals")
  Member "secure massive mimo transmission with an active eavesdropper":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "downlink secrecy rate of one bit massive mimo system with active eavesdropping")
  Member "linear precoding for the mimo multiple access channel with finite alphabet inputs and statistical csi":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "millimeter wave massive mimo downlink per group communications with hybrid linear precoding")
  Member "secure massive mimo transmission in the presence of an active eavesdropper":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "vulnerabilities of massive mimo systems to pilot contamination attacks")
  Member "transmit designs for the mimo broadcast channel with statistical csi":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "data aided secure massive mimo transmission under the pilot contamination attack")
  Member "linear precoder design for mimo interference channels with finite alphabet signaling":
    also connected through other hyperedges:
      - Hyperedge HE-6 (induced by source paper "data aided secure massive mimo transmission under the pilot contamination attack")
  Member "on capacity of large scale mimo multiple access channels with distributed sets of correlated antennas":
    also connected through other hyperedges:
      - Hyperedge HE-7 (induced by source paper "non bayesian activity detection large scale fading coefficient estimation and unsourced random access with a massive mimo receiver")
  Member "precoding by pairing subchannels to increase mimo capacity with discrete input alphabets":
    also connected through other hyperedges:
      - Hyperedge HE-8 (induced by source paper "a survey on mimo transmission with discrete input signals technical challenges advances and future trends")

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)