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 "large system analysis for amplify forward simo multiple access channel with ill conditioned second hop"):
  Abstract: Relaying has been extensively studied during the last decades and has found numerous applications in wireless communications. The simplest relaying method, namely amplify and forward, has shown potential in MIMO multiple access systems, when Gaussian fading channels are assumed for both hops. However, in some cases ill conditioned channels may appear on the second hop. For example, this impairment could affect cooperative BS systems with microwave link backhauling, which involve strong line of sight channels with insufficient scattering. In this paper, we consider a large system analysis of such as model focusing on both optimal joint decoding and joint MMSE filtering receivers. Analytical methods based on free probability are presented for calculating the ergodic throughput, the MMSE error and the average SINR. Furthermore, the performance degradation of the system throughput is evaluated considering second hop impairments such as ill-conditioning and rank deficiency, while high- and low-SNR limits are calculated for the considered performance metrics. Finally, the cooperative BS system is compared to a conventional channel resource division strategy and suitable operating points are proposed.

Includes members:
  Member "mmse performance analysis of generalized multibeam satellite channels":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "frame based precoding in satellite communications a multicast approach")
  Member "interference mitigation techniques for clustered multicell joint decoding systems":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "free probability based capacity calculation of multiantenna gaussian fading channels with cochannel interference")
  Member "free probability based capacity calculation of multiantenna gaussian fading channels with cochannel interference":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "interference mitigation techniques for clustered multicell joint decoding systems")
  Member "ergodic capacity analysis of amplify and forward mimo dual hop systems":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "dft based hybrid beamforming multiuser systems rate analysis and beam selection")
  Member "uplink comp under a constrained backhaul and imperfect channel knowledge":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "making cell free massive mimo competitive with mmse processing and centralized implementation")
  Member "crystallization in large wireless networks":
    also connected through other hyperedges:
      - Hyperedge HE-6 (induced by source paper "apply artificial noise to secure fading relay networks a ser based approach")

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)