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 of massive mimo with optimal m mmse processing"):
  Abstract: We consider the uplink of a Massive MIMO network with $L$ cells, each comprising a BS with $M$ antennas and $K$ single-antenna user equipments. Recently, \cite{BHS18A} studied the asymptotic spectral efficiency of such networks with optimal multicell minimum mean-squared error (M-MMSE) processing when $M\to \infty$ and $K$ is kept fixed. Remarkably, \cite{BHS18A} proved that, for practical channels with spatial correlation, the spectral efficiency grows unboundedly, even with pilot contamination. In this paper, we extend the analysis from \cite{BHS18A} to the alternative regime in which $M,K\to \infty$ with a given ratio. Tools from random matrix theory are used to compute low-complexity approximations which are proved to be asymptotically tight, but accurate for realistic system dimensions, as shown by simulations.

Includes members:
  Member "covariance matrix estimation for massive mimo":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "scalable cell free massive mimo systems")
  Member "fundamental asymptotic behavior of two user distributed massive mimo":
    also connected through other hyperedges:
      (none)
  Member "a bilinear equalizer for massive mimo systems":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "large scale fading precoding for maximizing the product of sinrs")
  Member "covariance matrix estimation in massive mimo":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "scalable cell free massive mimo systems")
  Member "massive mimo has unlimited capacity":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "joint power control and lsfd for wireless powered cell free massive mimo")
  Member "large system analysis of power normalization techniques in massive mimo":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "joint unicast and multi group multicast transmission in massive mimo systems")
  Member "massive mimo with imperfect channel covariance information":
    also connected through other hyperedges:
      - Hyperedge HE-6 (induced by source paper "scalable cell free massive mimo systems")
  Member "massive mimo with multi cell mmse processing exploiting all pilots for interference suppression":
    also connected through other hyperedges:
      - Hyperedge HE-7 (induced by source paper "power control in cellular massive mimo with varying user activity a deep learning solution")

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)