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: "open loop spatial multiplexing and diversity communications in ad hoc networks"
  Abstract: This paper investigates the performance of open-loop multi-antenna point-to-point links in ad hoc networks with slotted ALOHA medium access control (MAC). We consider spatial multiplexing transmission with linear maximum ratio combining and zero forcing receivers, as well as orthogonal space time block coded transmission. New closed-form expressions are derived for the outage probability, throughput and transmission capacity. Our results demonstrate that both the best performing scheme and the optimum number of transmit antennas depend on different network parameters, such as the node intensity and the signal-to-interference-and-noise ratio operating value. We then compare the performance to a network consisting of single-antenna devices and an idealized fully centrally coordinated MAC. These results show that multi-antenna schemes with a simple decentralized slotted ALOHA MAC can outperform even idealized single-antenna networks in various practical scenarios.

Connected through hyperedge HE-1 (induced by source paper "area spectral efficiency and sinr scaling laws in multi antenna cellular networks"):
  with members:
    - "scaling laws of dense multi antenna cellular networks"
    - "sinr and throughput of dense cellular networks with stretched exponential path loss"
    - "a unified asymptotic analysis of area spectral efficiency in ultradense cellular networks"
    - "performance limits of network densification"
    - "modeling and analysis of cellular networks using stochastic geometry a tutorial"
    - "performance impact of base station antenna heights in dense cellular networks"
    - "a primer on cellular network analysis using stochastic geometry"
    - "scaling laws for ergodic spectral efficiency in mimo poisson networks"

Connected through hyperedge HE-2 (induced by source paper "delay analysis of spatially coded mimo zfbf with retransmissions in random networks"):
  with members:
    - "capacity of cellular wireless network"
    - "impact of los nlos propagation and path loss in ultra dense cellular networks"
    - "heterogeneous cellular networks with spatio temporal traffic delay analysis and scheduling"
    - "managing interference correlation through random medium access"
    - "diversity polynomials for the analysis of temporal correlations in wireless networks"
    - "diversity loss due to interference correlation"
    - "throughput delay reliability tradeoff with arq in wireless ad hoc networks"
    - "a new phase transitions for local delays in manets"

Connected through hyperedge HE-3 (induced by source paper "a unified framework for the tractable analysis of multi antenna wireless networks"):
  with members:
    - "3gpp inspired hetnet model using poisson cluster process sum product functionals and downlink coverage"
    - "coverage analysis for millimeter wave networks the impact of directional antenna arrays"
    - "a tractable framework for performance analysis of dense multi antenna networks"
    - "ergodic spectral efficiency in mimo cellular networks"
    - "asymptotics and approximation of the sir distribution in general cellular networks"
    - "success probability and area spectral efficiency in multiuser mimo hetnets"
    - "downlink cellular network analysis with multi slope path loss models"
    - "user centric intercell interference nulling for downlink small cell networks"

Connected through hyperedge HE-4 (induced by source paper "a tractable framework for performance analysis of dense multi antenna networks"):
  with members:
    - "success probability and area spectral efficiency in multiuser mimo hetnets"
    - "user centric intercell interference nulling for downlink small cell networks"
    - "coverage and rate analysis for millimeter wave cellular networks"
    - "throughput and energy efficiency analysis of small cell networks with multi antenna base stations"
    - "enhancing secrecy with multi antenna transmission in wireless ad hoc networks"
    - "scaling up mimo opportunities and challenges with very large arrays"
    - "a tractable approach to coverage and rate in cellular networks"
    - "transmission capacity of ad hoc networks with spatial diversity"

Connected through hyperedge HE-5 (induced by source paper "physical layer security in heterogeneous cellular networks"):
  with members:
    - "optimal power allocation for artificial noise under imperfect csi against spatially random eavesdroppers"
    - "secrecy transmit beamforming for heterogeneous networks"
    - "physical layer security in downlink multi antenna cellular networks"
    - "principles of physical layer security in multiuser wireless networks a survey"
    - "throughput and energy efficiency analysis of small cell networks with multi antenna base stations"
    - "enhancing secrecy with multi antenna transmission in wireless ad hoc networks"
    - "physical layer security in cellular networks a stochastic geometry approach"
    - "on the design of artificial noise aided secure multi antenna transmission in slow fading channels"

Connected through hyperedge HE-6 (induced by source paper "scaling laws for ergodic spectral efficiency in mimo poisson networks"):
  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"
    - "the performance of successive interference cancellation in random wireless networks"
    - "multi antenna communication in ad hoc networks achieving mimo gains with simo transmission"
    - "a tractable approach to coverage and rate in cellular networks"
    - "transmission capacity of ad hoc networks with spatial diversity"
    - "hierarchical cooperation achieves optimal capacity scaling in ad hoc networks"

Connected through hyperedge HE-7 (induced by source paper "maximal ratio transmission in wireless poisson networks under spatially correlated fading channels"):
  with members:
    - "effect of spatial interference correlation on the performance of maximum ratio combining"
    - "fundamental limits of cooperation"
    - "diversity loss due to interference correlation"
    - "a tractable approach to coverage and rate in cellular networks"
    - "performance of optimum combining in a poisson field of interferers and rayleigh fading channels"
    - "transmission capacity of ad hoc networks with spatial diversity"

Connected through hyperedge HE-8 (induced by source paper "performance of pzf and mmse receivers in cellular networks with multi user spatial multiplexing"):
  with members:
    - "multi antenna communication in ad hoc networks achieving mimo gains with simo transmission"
    - "a tractable approach to coverage and rate in cellular networks"
    - "spatial multiplexing with mmse receivers single stream optimality in ad hoc networks"

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)