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: "mimo downlink scheduling with non perfect channel state knowledge"
  Abstract: Downlink scheduling schemes are well-known and widely investigated under the assumption that the channel state is perfectly known to the scheduler. In the multiuser MIMO (broadcast) case, downlink scheduling in the presence of non-perfect channel state information (CSI) is only scantly treated. In this paper we provide a general framework that addresses the problem systematically. Also, we illuminate the key role played by the channel state prediction error: our scheme treats in a fundamentally different way users with small channel prediction error ("predictable" users) and users with large channel prediction error ("non-predictable" users), and can be interpreted as a near-optimal opportunistic time-sharing strategy between MIMO downlink beamforming to predictable users and space-time coding to nonpredictable users. Our results, based on a realistic MIMO channel model used in 3GPP standardization, show that the proposed algorithms can significantly outperform a conventional "mismatched" scheduling scheme that treats the available CSI as if it was perfect.

Connected through hyperedge HE-1 (induced by source paper "dynamic resource allocation in co located and cell free massive mimo"):
  with members:
    - "dynamic scheduling and power control in uplink massive mimo with random data arrivals"
    - "ubiquitous cell free massive mimo communications"
    - "large scale fading decoding in cellular massive mimo systems with spatially correlated channels"
    - "making cell free massive mimo competitive with mmse processing and centralized implementation"
    - "dynamic power control for packets with deadlines"
    - "performance of cell free massive mimo systems with mmse and lsfd receivers"
    - "optimal pilot and payload power control in single cell massive mimo systems"
    - "channel hardening and favorable propagation in cell free massive mimo with stochastic geometry"

Connected through hyperedge HE-2 (induced by source paper "dynamic scheduling and power control in uplink massive mimo with random data arrivals"):
  with members:
    - "optimal pilot and payload power control in single cell massive mimo systems"
    - "ultra reliable and low latency communication in mmwave enabled massive mimo networks"
    - "massive mimo ten myths and one critical question"
    - "massive mimo performance evaluation based on measured propagation data"
    - "massive mimo for next generation wireless systems"

Connected through hyperedge HE-3 (induced by source paper "adaptive coded caching for fair delivery over fading channels"):
  with members:
    - "the exact rate memory tradeoff for caching with uncoded prefetching"
    - "utility optimal scheduling for coded caching in general topologies"
    - "multi antenna coded caching"
    - "noisy broadcast networks with receiver caching"
    - "wireless caching technical misconceptions and business barriers"
    - "wireless coded caching a topological perspective"
    - "order optimal rate of caching and coded multicasting with random demands"
    - "the performance analysis of coded cache in wireless fading channel"

Connected through hyperedge HE-4 (induced by source paper "multi band covariance interpolation with applications in massive mimo"):
  with members:
    - "compressive estimation of a stochastic process with unknown autocorrelation function"
    - "low complexity and statistically robust beamformer design for massive mimo systems"
    - "efficient downlink channel probing and uplink feedback in fdd massive mimo systems"
    - "truncated polynomial expansion downlink precoders and uplink detectors for massive mimo"
    - "low complexity massive mimo subspace estimation and tracking from low dimensional projections"
    - "channel vector subspace estimation from low dimensional projections"
    - "linear precoding based on polynomial expansion large scale multi cell mimo systems"

Connected through hyperedge HE-5 (induced by source paper "an overview on resource allocation techniques for multi user mimo systems"):
  with members:
    - "low complexity downlink user selection for massive mimo systems"
    - "alternating minimization algorithms for hybrid precoding in millimeter wave mimo systems"
    - "an overview of signal processing techniques for millimeter wave mimo systems"
    - "user association in 5g networks a survey and an outlook"
    - "cell free massive mimo versus small cells"
    - "mu mimo mac protocols for wireless local area networks a survey"
    - "on the number of rf chains and phase shifters and scheduling design with hybrid analog digital beamforming"
    - "hybrid digital and analog beamforming design for large scale antenna arrays"

Connected through hyperedge HE-6 (induced by source paper "joint user scheduling and beam selection optimization for beam based massive mimo downlinks"):
  with members:
    - "a real time millimeter wave phased array mimo channel sounder"
    - "bdma for millimeter wave terahertz massive mimo transmission with per beam synchronization"
    - "an overview of signal processing techniques for millimeter wave mimo systems"
    - "hybrid beamforming for massive mimo a survey"
    - "achievable rates of fdd massive mimo systems with spatial channel correlation"
    - "dynamic channel acquisition in mu mimo"
    - "channel estimation and hybrid precoding for millimeter wave cellular systems"
    - "massive mimo for next generation wireless systems"

Connected through hyperedge HE-7 (induced by source paper "alpha fair coded caching"):
  with members:
    - "noisy broadcast networks with receiver caching"
    - "wireless caching technical misconceptions and business barriers"
    - "wireless coded caching a topological perspective"
    - "order optimal rate of caching and coded multicasting with random demands"
    - "coded caching for delay sensitive content"
    - "online coded caching"
    - "coded caching with nonuniform demands"
    - "decentralized coded caching attains order optimal memory rate tradeoff"

Connected through hyperedge HE-8 (induced by source paper "truncated polynomial expansion downlink precoders and uplink detectors for massive mimo"):
  with members:
    - "spatially common sparsity based adaptive channel estimation and feedback for fdd massive mimo"
    - "linear precoding based on polynomial expansion large scale multi cell mimo systems"
    - "distributed compressive csit estimation and feedback for fdd multi user massive mimo systems"
    - "low complexity polynomial channel estimation in large scale mimo with arbitrary statistics"
    - "massive mimo how many antennas do we need"
    - "asymptotic moments for interference mitigation in correlated fading channels"

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)