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 "a survey on mimo transmission with discrete input signals technical challenges advances and future trends"):
  Abstract: Multiple antennas have been exploited for spatial multiplexing and diversity transmission in a wide range of communication applications. However, most of the advances in the design of high speed wireless multiple-input multiple output (MIMO) systems are based on information-theoretic principles that demonstrate how to efficiently transmit signals conforming to Gaussian distribution. Although the Gaussian signal is capacity-achieving, signals conforming to discrete constellations are transmitted in practical communication systems. As a result, this paper is motivated to provide a comprehensive overview on MIMO transmission design with discrete input signals. We first summarize the existing fundamental results for MIMO systems with discrete input signals. Then, focusing on the basic point-to-point MIMO systems, we examine transmission schemes based on three most important criteria for communication systems: the mutual information driven designs, the mean square error driven designs, and the diversity driven designs. Particularly, a unified framework which designs low complexity transmission schemes applicable to massive MIMO systems in upcoming 5G wireless networks is provided in the first time. Moreover, adaptive transmission designs which switch among these criteria based on the channel conditions to formulate the best transmission strategy are discussed. Then, we provide a survey of the transmission designs with discrete input signals for multiuser MIMO scenarios, including MIMO uplink transmission, MIMO downlink transmission, MIMO interference channel, and MIMO wiretap channel. Additionally, we discuss the transmission designs with discrete input signals for other systems using MIMO technology. Finally, technical challenges which remain unresolved at the time of writing are summarized and the future trends of transmission designs with discrete input signals are addressed.

Includes members:
  Member "asymptotic performance analysis of a k hop amplify and forward relay mimo channel":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "asymptotic analysis of su mimo channels with transmitter noise and mismatched joint decoding")
  Member "iterative distributed minimum total mse approach for secure communications in mimo interference channels":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "robust beamforming and jamming for enhancing the physical layer security of full duplex radios")
  Member "asymptotic analysis of su mimo channels with transmitter noise and mismatched joint decoding":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "mixed adc massive mimo uplink in frequency selective channels")
  Member "secure massive mimo transmission with an active eavesdropper":
    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 "interference aligned space time transmission with diversity for the 2 times 2 x network":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "on off switched interference alignment for diversity multiplexing tradeoff improvement in the 2 user x network with two antennas")
  Member "space time encoded miso broadcast channel with outdated csit an error rate and diversity performance analysis":
    also connected through other hyperedges:
      - Hyperedge HE-6 (induced by source paper "throughput region of spatially correlated interference packet networks")
  Member "high snr asymptotics of mutual information for discrete constellations with applications to bicm":
    also connected through other hyperedges:
      - Hyperedge HE-7 (induced by source paper "introducing enumerative sphere shaping for optical communication systems with short blocklengths")
  Member "differential distributed space time coding with imperfect synchronization in frequency selective channels":
    also connected through other hyperedges:
      - Hyperedge HE-8 (induced by source paper "an analysis of two user uplink asynchronous non orthogonal multiple access systems")

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)