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 spectral efficiency of the uplink in spatially distributed wireless networks with multi antenna base stations"
  Abstract: The spectral efficiency of a representative uplink of a given length, in interference-limited, spatially-distributed wireless networks with hexagonal cells, simple power control, and multiantenna linear Minimum-Mean-Square-Error receivers is found to approach an asymptote as the numbers of base-station antennas N and wireless nodes go to infinity. An approximation for the area-averaged spectral efficiency of a representative link (averaged over the spatial base-station and mobile distributions), for Poisson distributed base stations, is also provided. For large N, in the interference-limited regime, the area-averaged spectral efficiency is primarily a function of the ratio of the product of N and the ratio of base-station to wireless-node densities, indicating that it is possible to scale such networks by linearly increasing the product of the number of base-station antennas and the relative density of base stations to wireless nodes, with wireless-node density. The results are useful for designers of wireless systems with high inter-cell interference because it provides simple expressions for spectral efficiency as a function of tangible system parameters like base-station and wireless-node densities, and number of antennas. These results were derived combining infinite random matrix theory and stochastic geometry.

Connected through hyperedge HE-1 (induced by source paper "uplink performance of multi antenna cellular networks with co operative base stations and user centric clustering"):
  with members:
    - "ergodic spectral efficiency in mimo cellular networks"
    - "on a user centric base station cooperation scheme for reliable communications"
    - "full duplex cloud ran with uplink downlink remote radio head association"
    - "heterogeneous cellular networks with spatio temporal traffic delay analysis and scheduling"
    - "cooperative base station coloring for pair wise multi cell coordination"
    - "the world s first real time testbed for massive mimo design implementation and validation"
    - "uplink and downlink rate analysis of a full duplex c ran with radio remote head association"
    - "distributed massive mimo in cellular networks impact of imperfect hardware and number of oscillators"

Connected through hyperedge HE-2 (induced by source paper "energy efficiency of multi user multi antenna random cellular networks with minimum distance constraints"):
  with members:
    - "5g ultra dense cellular networks"
    - "downlink mimo hetnets modeling ordering results and performance analysis"
    - "average rate of downlink heterogeneous cellular networks over generalized fading channels a stochastic geometry approach"
    - "capacity analysis of a multi cell multi antenna cooperative cellular network with co channel interference"
    - "green cellular networks a survey some research issues and challenges"
    - "energy and spectral efficiency of very large multiuser mimo systems"
    - "mean interference in hard core wireless networks"
    - "downlink capacity and base station density in cellular networks"

Connected through hyperedge HE-3 (induced by source paper "unified stochastic geometry model for mimo cellular networks with retransmissions"):
  with members:
    - "spectral efficiency of dynamic coordinated beamforming a stochastic geometry approach"
    - "a tractable model for noncoherent joint transmission base station cooperation"
    - "massive mimo meets hetnet interference coordination through spatial blanking"
    - "analysis of joint transmit receive diversity in downlink mimo 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"
    - "downlink mimo hetnets modeling ordering results and performance analysis"
    - "downlink multi antenna heterogeneous cellular network with load balancing"

Connected through hyperedge HE-4 (induced by source paper "uplink performance of large optimum combining antenna arrays in power controlled cellular networks"):
  with members:
    - "massive mimo for next generation wireless systems"
    - "asymptotic data rates of receive diversity systems with mmse estimation and spatially correlated interferers"
    - "uplink performance of large optimum combining antenna arrays in poisson cell networks"
    - "analytical modeling of uplink cellular networks"
    - "cellular systems with many antennas large system analysis under pilot contamination"

Connected through hyperedge HE-5 (induced by source paper "asymptotic data rates of receive diversity systems with mmse estimation and spatially correlated interferers"):
  with members:
    - "analytical modeling of uplink cellular networks"
    - "interference and throughput in aloha based ad hoc networks with isotropic node distribution"
    - "high sir transmission capacity of wireless networks with general fading and node distribution"
    - "multi antenna communication in ad hoc networks achieving mimo gains with simo transmission"
    - "open loop spatial multiplexing and diversity communications in ad hoc networks"
    - "mean interference in hard core wireless networks"
    - "a tractable approach to coverage and rate in cellular networks"
    - "outage probability of general ad hoc networks in the high reliability regime"

Connected through hyperedge HE-6 (induced by source paper "uplink performance of large optimum combining antenna arrays in poisson cell networks"):
  with members:
    - "massive mimo for next generation wireless systems"
    - "asymptotic data rates of receive diversity systems with mmse estimation and spatially correlated interferers"
    - "cellular systems with many antennas large system analysis under pilot contamination"
    - "high sir transmission capacity of wireless networks with general fading and node distribution"
    - "a tractable approach to coverage and rate in cellular networks"
    - "outage probability of general ad hoc networks in the high reliability regime"
    - "pilot contamination and precoding in multi cell tdd systems"

Connected through hyperedge HE-7 (induced by source paper "analytical modeling of uplink cellular networks"):
  with members:
    - "modeling and analysis of k tier downlink heterogeneous cellular networks"
    - "analytical evaluation of fractional frequency reuse for heterogeneous cellular networks"
    - "a tractable approach to coverage and rate in cellular networks"
    - "analytical evaluation of fractional frequency reuse for ofdma cellular networks"
    - "on the accuracy of the wyner model in cellular networks"
    - "fractional power control for decentralized wireless networks"

Connected through hyperedge HE-8 (induced by source paper "random deployment of data collectors for serving randomly located sensors"):
  with members:
    - "a tractable approach to coverage and rate in cellular networks"
    - "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)