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: "impact of pointing errors on the performance of mixed rf fso dual hop transmission systems"
  Abstract: In this work, the performance analysis of a dual-hop relay transmission system composed of asymmetric radio-frequency (RF)/free-space optical (FSO) links with pointing errors is presented. More specifically, we build on the system model presented in [1] to derive new exact closed-form expressions for the cumulative distribution function, probability density function, moment generating function, and moments of the end-to-end signal-to-noise ratio in terms of the Meijer's G function. We then capitalize on these results to offer new exact closed-form expressions for the higher-order amount of fading, average error rate for binary and M-ary modulation schemes, and the ergodic capacity, all in terms of Meijer's G functions. Our new analytical results were also verified via computer-based Monte-Carlo simulation results.

Connected through hyperedge HE-1 (induced by source paper "fundamental limits of spectrum sharing for noma based cooperative relaying under a peak interference constraint"):
  with members:
    - "cognitive non orthogonal multiple access with cooperative relaying a new wireless frontier for 5g spectrum sharing"
    - "a survey on non orthogonal multiple access for 5g networks research challenges and future trends"
    - "on the performance of noma based cooperative relaying systems over rician fading channels"
    - "nonorthogonal multiple access in large scale underlay cognitive radio networks"
    - "relay selection for cooperative noma"
    - "lattice partition multiple access a new method of downlink non orthogonal multiuser transmissions"
    - "performance analysis of project and forward relaying in mixed mimo pinhole and rayleigh dual hop channel"
    - "a new formula for the ber of binary modulations with dual branch selection over generalized k"

Connected through hyperedge HE-2 (induced by source paper "performance of two way relaying over α μ fading channels in hybrid rf fso wireless networks"):
  with members:
    - "a new formula for the ber of binary modulations with dual branch selection over generalized k"
    - "on the distribution of the sum of gamma gamma variates and applications in rf and optical wireless communications"
    - "performance analysis of mimo mrc in double correlated rayleigh environments"

Connected through hyperedge HE-3 (induced by source paper "cognitive mimo rf fso cooperative relay communication with mobile nodes and imperfect channel state information"):
  with members:
    - "performance analysis of project and forward relaying in mixed mimo pinhole and rayleigh dual hop channel"
    - "the effects of limited channel knowledge on cognitive radio system capacity"
    - "a new formula for the ber of binary modulations with dual branch selection over generalized k"

Connected through hyperedge HE-4 (induced by source paper "performance analysis of free space optical links over m a laga mathcal m turbulence channels with pointing errors"):
  with members:
    - "average rate of downlink heterogeneous cellular networks over generalized fading channels a stochastic geometry approach"
    - "a new formula for the ber of binary modulations with dual branch selection over generalized k"
    - "on the capacity of free space optical intensity channels"

Connected through hyperedge HE-5 (induced by source paper "on the performance of millimeter wave based rf fso multi hop and mesh networks"):
  with members:
    - "performance analysis of free space optical links over m a laga mathcal m turbulence channels with pointing errors"
    - "on the performance of rf fso links with and without hybrid arq"
    - "unified performance analysis of mixed radio frequency free space optical dual hop transmission systems"
    - "unified performance analysis of mixed line of sight rf fso fixed gain dual hop transmission systems"
    - "on the benefits of partial channel state information for repetition protocols in block fading channels"
    - "on the capacity of free space optical intensity channels"

Connected through hyperedge HE-6 (induced by source paper "performance analysis of rf fso multi hop networks"):
  with members:
    - "on the performance of millimeter wave based rf fso multi hop and mesh networks"
    - "on the performance of rf fso links with and without hybrid arq"
    - "unified performance analysis of mixed radio frequency free space optical dual hop transmission systems"

Connected through hyperedge HE-7 (induced by source paper "amplify and forward two way relaying system over free space optics channels"):
  with members:
    - "performance analysis of massive mimo for cell boundary users"
    - "prototyping real time full duplex radios"
    - "compressed channel feedback for correlated massive mimo systems"

Connected through hyperedge HE-8 (induced by source paper "ergodic capacity analysis of free space optical links with nonzero boresight pointing errors"):
  with members:
    - "mgf approach to the analysis of generalized two ray fading models"
    - "on the capacity of free space optical intensity 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)