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: "limited feedback beamforming over temporally correlated channels"
  Abstract: Feedback of quantized channel state information (CSI), called limited feedback, enables transmit beamforming in multiple-input-multiple-output (MIMO) wireless systems with a small amount of overhead. Due to its efficiency, beamforming with limited feedback has been adopted in several wireless communication standards. Prior work on limited feedback commonly adopts the block fading channel model where temporal correlation in wireless channels is neglected. This paper considers temporally-correlated channels and designs single-user transmit beamforming with limited feedback. Analytical results concerning CSI feedback are derived by modeling quantized CSI as a first-order finite-state Markov chain. These results include the source bit rate generated by time-varying quantized CSI, the required bit rate for a CSI feedback channel, and the effect of feedback delay. In particular, based on the theory of Markov chain convergence rate, feedback delay is proved to reduce the throughput gain due to CSI feedback at least exponentially. Furthermore, an algorithm is proposed for CSI feedback compression in time. Combining the results in this work leads to a new method for designing limited feedback beamforming as demonstrated by a design example.

Connected through hyperedge HE-1 (induced by source paper "high dimensional stochastic gradient quantization for communication efficient edge learning"):
  with members:
    - "communication efficient distributed blockwise momentum sgd with error feedback"
    - "federated learning strategies for improving communication efficiency"
    - "towards an intelligent edge wireless communication meets machine learning"
    - "signsgd compressed optimisation for non convex problems"
    - "error compensated quantized sgd and its applications to large scale distributed optimization"
    - "qsgd communication efficient sgd via gradient quantization and encoding"
    - "communication efficient learning of deep networks from decentralized data"
    - "compressed channel feedback for correlated massive mimo systems"

Connected through hyperedge HE-2 (induced by source paper "limited feedback channel estimation in massive mimo with non uniform directional dictionaries"):
  with members:
    - "overview of full dimension mimo in lte advanced pro"
    - "an overview of signal processing techniques for millimeter wave mimo systems"
    - "sparse channel estimation for massive mimo with 1 bit feedback per dimension"
    - "compressed sensing for wireless communications useful tips and tricks"
    - "hybrid mimo architectures for millimeter wave communications phase shifters or switches"
    - "achievable rates of fdd massive mimo systems with spatial channel correlation"
    - "noncoherent trellis coded quantization a practical limited feedback technique for massive mimo systems"
    - "preliminary results on 3d channel modeling from theory to standardization"

Connected through hyperedge HE-3 (induced by source paper "on optimizing feedback interval for temporally correlated mimo channels with transmit beamforming and finite rate feedback"):
  with members:
    - "on transmit beamforming for miso ofdm channels with finite rate feedback"
    - "training sequence design for feedback assisted hybrid beamforming in massive mimo systems"
    - "ensemble properties of rvq based limited feedback beamforming codebooks"
    - "tree structured random vector quantization for limited feedback wireless channels"
    - "on the minimum differential feedback for time correlated mimo rayleigh block fading channels"
    - "optimization of training and feedback overhead for beamforming over block fading channels"
    - "capacity of a multiple antenna fading channel with a quantized precoding matrix"

Connected through hyperedge HE-4 (induced by source paper "efficient downlink channel probing and uplink feedback in fdd massive mimo systems"):
  with members:
    - "low complexity massive mimo subspace estimation and tracking from low dimensional projections"
    - "dictionary learning based sparse channel representation and estimation for fdd massive mimo systems"
    - "compressed channel feedback for correlated massive mimo systems"
    - "channel vector subspace estimation from low dimensional projections"
    - "fundamental limits in correlated fading mimo broadcast channels benefits of transmit correlation diversity"
    - "achievable rates of fdd massive mimo systems with spatial channel correlation"
    - "distributed compressive csit estimation and feedback for fdd multi user massive mimo systems"
    - "massive mimo for next generation wireless systems"

Connected through hyperedge HE-5 (induced by source paper "on the optimal feedback rate in interference limited multi antenna cellular systems"):
  with members:
    - "success probability and area spectral efficiency in multiuser mimo hetnets"
    - "spectral efficiency of dynamic coordinated beamforming a stochastic geometry approach"
    - "spectral efficiency scaling laws in dense random wireless networks with multiple receive antennas"
    - "user centric intercell interference nulling for downlink small cell networks"
    - "interference coordination random clustering and adaptive limited feedback"
    - "downlink mimo hetnets modeling ordering results and performance analysis"
    - "downlink multi antenna heterogeneous cellular network with load balancing"
    - "heterogeneous cellular networks with flexible cell association a comprehensive downlink sinr analysis"

Connected through hyperedge HE-6 (induced by source paper "how much feedback is required in multi antenna downlink cellular systems"):
  with members:
    - "spectral efficiency of dynamic coordinated beamforming a stochastic geometry approach"
    - "spectral efficiency scaling laws in dense random wireless networks with multiple receive antennas"
    - "user centric intercell interference nulling for downlink small cell networks"
    - "interference coordination random clustering and adaptive limited feedback"
    - "downlink mimo hetnets modeling ordering results and performance analysis"
    - "heterogeneous cellular networks with flexible cell association a comprehensive downlink sinr analysis"
    - "downlink sdma with limited feedback in interference limited wireless networks"
    - "adaptive bit partitioning for multicell intercell interference nulling with delayed limited feedback"

Connected through hyperedge HE-7 (induced by source paper "compressive sensing with prior support quality information and application to massive mimo channel estimation with temporal correlation"):
  with members:
    - "an improved rip based performance guarantee for sparse signal recovery via orthogonal matching pursuit"
    - "distributed compressive csit estimation and feedback for fdd multi user massive mimo systems"
    - "massive mimo for next generation wireless systems"
    - "efficient high dimensional inference in the multiple measurement vector problem"
    - "exact recovery conditions for sparse representations with partial support information"
    - "expectation maximization gaussian mixture approximate message passing"
    - "dynamic compressive sensing of time varying signals via approximate message passing"
    - "estimation of sparse mimo channels with common support"

Connected through hyperedge HE-8 (induced by source paper "exploiting the preferred domain of fdd massive mimo systems with uniform planar arrays"):
  with members:
    - "pilot beam pattern design for channel estimation in massive mimo systems"
    - "massive mimo for next generation wireless systems"
    - "kronecker product correlation model and limited feedback codebook design in a 3d channel model"
    - "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"
    - "noncoherent trellis coded quantization a practical limited feedback technique for massive mimo systems"
    - "scaling up mimo opportunities and challenges with very large arrays"

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)