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: "quantization bounds on grassmann manifolds and applications to mimo communications"
  Abstract: This paper considers the quantization problem on the Grassmann manifold \mathcal{G}_{n,p}, the set of all p-dimensional planes (through the origin) in the n-dimensional Euclidean space. The chief result is a closed-form formula for the volume of a metric ball in the Grassmann manifold when the radius is sufficiently small. This volume formula holds for Grassmann manifolds with arbitrary dimension n and p, while previous results pertained only to p=1, or a fixed p with asymptotically large n. Based on this result, several quantization bounds are derived for sphere packing and rate distortion tradeoff. We establish asymptotically equivalent lower and upper bounds for the rate distortion tradeoff. Since the upper bound is derived by constructing random codes, this result implies that the random codes are asymptotically optimal. The above results are also extended to the more general case, in which \mathcal{G}_{n,q} is quantized through a code in \mathcal{G}_{n,p}, where p and q are not necessarily the same. Finally, we discuss some applications of the derived results to multi-antenna communication systems.

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 "cube split a structured grassmannian constellation for non coherent simo communications"):
  with members:
    - "fast approximate construction of best complex antipodal spherical codes"
    - "cube split structured quantizers on the grassmannian of lines"
    - "manopt a matlab toolbox for optimization on manifolds"
    - "on the capacity of large mimo block fading channels"

Connected through hyperedge HE-3 (induced by source paper "automatic recognition of space time constellations by learning on the grassmann manifold"):
  with members:
    - "inference from randomized transmissions by many backscatter sensors"
    - "deep architectures for modulation recognition"
    - "bayes optimal joint channel and data estimation for massive mimo with low precision adcs"
    - "short packet communications over multiple antenna rayleigh fading channels"
    - "on the capacity of large mimo block fading channels"

Connected through hyperedge HE-4 (induced by source paper "opportunistic downlink interference alignment for multi cell mimo networks"):
  with members:
    - "codebook based opportunistic interference alignment"
    - "opportunistic downlink interference alignment"
    - "on the achievable dof and user scaling law of opportunistic interference alignment in 3 transmitter mimo interference channels"
    - "effect of receive spatial diversity on the degrees of freedom region in multi cell random beamforming"
    - "parallel opportunistic routing in wireless networks"
    - "opportunistic interference alignment for mimo interfering multiple access channels"
    - "multiuser diversity in interfering broadcast channels achievable degrees of freedom and user scaling law"
    - "multi cell random beamforming achievable rate and degrees of freedom region"

Connected through hyperedge HE-5 (induced by source paper "a time variant channel prediction and feedback framework for interference alignment"):
  with members:
    - "on the degrees of freedom for opportunistic interference alignment with 1 bit feedback the 3 cell case"
    - "delay and doppler spreads of nonstationary vehicular channels for safety relevant scenarios"
    - "grassmannian differential limited feedback for interference alignment"
    - "adaptive interference alignment with csi uncertainty"
    - "ensemble properties of rvq based limited feedback beamforming codebooks"
    - "optimization of training and feedback overhead for beamforming over block fading channels"
    - "interference alignment with analog channel state feedback"
    - "interference alignment under limited feedback for mimo interference channels"

Connected through hyperedge HE-6 (induced by source paper "hybrid beamforming with spatial modulation in multi user massive mimo mmwave networks"):
  with members:
    - "hybrid beamforming for large antenna arrays with phase shifter selection"
    - "on the number of rf chains and phase shifters and scheduling design with hybrid analog digital beamforming"
    - "limited feedback hybrid precoding for multi user millimeter wave systems"
    - "spatially sparse precoding in millimeter wave mimo systems"
    - "grouping based interference alignment with ia cell assignment in multi cell mimo mac under limited feedback"

Connected through hyperedge HE-7 (induced by source paper "density of spherically embedded stiefel and grassmann codes"):
  with members:
    - "volume of metric balls in high dimensional complex grassmann manifolds"
    - "from random matrix theory to coding theory volume of a metric ball in unitary group"
    - "on block coherence of frames"
    - "constructions of grassmannian simplices"
    - "linear programming bounds for unitary space time codes"

Connected through hyperedge HE-8 (induced by source paper "cube split structured quantizers on the grassmannian of lines"):
  with members:
    - "trellis extended codebooks and successive phase adjustment a path from lte advanced to fdd massive mimo systems"

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)