human: Given a node-centered hypergraph: <hypergraph>, where nodes represent papers and hyperedges represent sets of papers co-cited by a source paper.

Details of the hypergraph:
Center node: "asymptotic coverage probability and rate in massive mimo networks"
  Abstract: Massive multiple-input multiple-output (MIMO) is a transmission technique for cellular systems that uses many antennas to support not-as-many users. Thus far, the performance of massive MIMO has only been examined in finite cellular networks. In this letter, we analyze its performance in random cellular networks with Poisson distributed base station locations. Specifically, we provide analytical expressions for the asymptotic coverage probability and rate in both downlink and uplink when each base station has a large number of antennas. The results show that, though limited by pilot contamination, massive MIMO can provide significantly higher asymptotic data rate per user than the single-antenna network.

Connected through hyperedge HE-1 (induced by source paper "pilot reuse among d2d users in d2d underlaid massive mimo systems"):
  with members:
    - "energy efficient joint resource allocation and power control for d2d communications"
    - "graph coloring based pilot allocation to mitigate pilot contamination for multi cell massive mimo systems"
    - "energy efficient resource allocation for device to device underlay communication"
    - "an uplink interference analysis for massive mimo systems with mrc and zf receivers"
    - "pilot reuse for massive mimo transmission over spatially correlated rayleigh fading channels"
    - "the interplay between massive mimo and underlaid d2d networking"
    - "a survey on device to device communication in cellular networks"
    - "a coordinated approach to channel estimation in large scale multiple antenna systems"

Connected through hyperedge HE-2 (induced by source paper "cell coverage extension with orthogonal random precoding for massive mimo systems"):
  with members:
    - "performance analysis of massive mimo for cell boundary users"
    - "spatially common sparsity based adaptive channel estimation and feedback for fdd massive mimo"
    - "distributed compressive csit estimation and feedback for fdd multi user massive mimo systems"
    - "downlink training techniques for fdd massive mimo systems open loop and closed loop training with memory"
    - "trellis extended codebooks and successive phase adjustment a path from lte advanced to fdd massive mimo systems"
    - "effect of receive spatial diversity on the degrees of freedom region in multi cell random beamforming"
    - "multi cell random beamforming achievable rate and degrees of freedom region"
    - "energy and spectral efficiency of very large multiuser mimo systems"

Connected through hyperedge HE-3 (induced by source paper "guard region model for pilot reuse analysis in uplink massive mimo systems"):
  with members:
    - "capacity analysis of one bit quantized mimo systems with transmitter channel state information"
    - "deploying dense networks for maximal energy efficiency small cells meet massive mimo"
    - "analyzing uplink sinr and rate in massive mimo systems using stochastic geometry"
    - "statistical modeling and probabilistic analysis of cellular networks with determinantal point processes"
    - "coverage and rate analysis for millimeter wave cellular networks"
    - "what will 5g be"
    - "blind pilot decontamination"
    - "massive mimo for maximal spectral efficiency how many users and pilots should be allocated"

Connected through hyperedge HE-4 (induced by source paper "analyzing uplink sinr and rate in massive mimo systems using stochastic geometry"):
  with members:
    - "deploying dense networks for maximal energy efficiency small cells meet massive mimo"
    - "an uplink interference analysis for massive mimo systems with mrc and zf receivers"
    - "fractional pilot reuse in massive mimo systems"
    - "on stochastic geometry modeling of cellular uplink transmission with truncated channel inversion power control"
    - "aspects of favorable propagation in massive mimo"
    - "joint rate and sinr coverage analysis for decoupled uplink downlink biased cell associations in hetnets"
    - "analysis and optimization of inter tier interference coordination in downlink multi antenna hetnets with offloading"
    - "massive mimo for next generation wireless systems"

Connected through hyperedge HE-5 (induced by source paper "user centric interference nulling in downlink multi antenna heterogeneous networks"):
  with members:
    - "the mean interference to signal ratio and its key role in cellular and amorphous networks"
    - "user centric intercell interference nulling for downlink small cell networks"
    - "a tractable model for noncoherent joint transmission base station cooperation"
    - "analysis and optimization of inter tier interference coordination in downlink multi antenna hetnets with offloading"
    - "massive mimo meets hetnet interference coordination through spatial blanking"
    - "location aware cross tier coordinated multipoint transmission in two tier cellular networks"
    - "a stochastic geometry analysis of inter cell interference coordination and intra cell diversity"
    - "interference coordination random clustering and adaptive limited feedback"

Connected through hyperedge HE-6 (induced by source paper "analysis and optimization of inter tier interference coordination in downlink multi antenna hetnets with offloading"):
  with members:
    - "spectral efficiency of dynamic coordinated beamforming a stochastic geometry approach"
    - "the mean interference to signal ratio and its key role in cellular and amorphous networks"
    - "user centric intercell interference nulling for downlink small cell networks"
    - "an overview of load balancing in hetnets old myths and open problems"
    - "massive mimo meets hetnet interference coordination through spatial blanking"
    - "energy efficiency of cross tier base station cooperation in heterogeneous cellular networks"
    - "location aware cross tier coordinated multipoint transmission in two tier cellular networks"
    - "a stochastic geometry analysis of inter cell interference coordination and intra cell diversity"

Connected through hyperedge HE-7 (induced by source paper "the interplay between massive mimo and underlaid d2d networking"):
  with members:
    - "an uplink interference analysis for massive mimo systems with mrc and zf receivers"
    - "spectrum sharing for device to device communication in cellular networks"
    - "massive mimo for next generation wireless systems"
    - "modeling analysis and optimization of multicast device to device transmissions"
    - "spectrum sharing scheme between cellular users and ad hoc device to device users"
    - "scaling up mimo opportunities and challenges with very large arrays"
    - "fundamental limits of distributed caching in d2d wireless networks"
    - "multi antenna communication in ad hoc networks achieving mimo gains with simo transmission"

Connected through hyperedge HE-8 (induced by source paper "hetnets and massive mimo modeling potential gains and performance analysis"):
  with members:
    - "scaling up mimo opportunities and challenges with very large arrays"
    - "transmission capacity of ad hoc networks with spatial diversity"

Question: Please tell me which class the center node 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)