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: "a new formula for the ber of binary modulations with dual branch selection over generalized k"
  Abstract: Error performance is one of the main performance measures and the derivation of its closed-form expression has proved to be quite involved for certain communication systems operating over composite fading channels. In this letter, a unified closed-form expression, applicable to different binary modulation schemes, for the bit error rate of dual-branch selection diversity based systems undergoing independent but not necessarily identically distributed generalized-K fading is derived in terms of the extended generalized bivariate Meijer G-function.

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"
    - "impact of pointing errors on the performance of mixed rf fso dual hop transmission systems"

Connected through hyperedge HE-2 (induced by source paper "a unified effective capacity performance analysis of lp norm diversity reception over arbitrary and correlated generalized fading channels"):
  with members:
    - "unified framework for the effective rate analysis of wireless communication systems over miso fading channels"
    - "on the computation of the higher order statistics of the channel capacity over generalized fading channels"
    - "a unified mgf based capacity analysis of diversity combiners over generalized fading channels"

Connected through hyperedge HE-3 (induced by source paper "performance of two way relaying over α μ fading channels in hybrid rf fso wireless networks"):
  with members:
    - "impact of pointing errors on the performance of mixed rf fso dual hop transmission systems"
    - "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-4 (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"
    - "impact of pointing errors on the performance of mixed rf fso dual hop transmission systems"
    - "the effects of limited channel knowledge on cognitive radio system capacity"

Connected through hyperedge HE-5 (induced by source paper "performance analysis of free space optical links over m a laga mathcal m turbulence channels with pointing errors"):
  with members:
    - "impact of pointing errors on the performance of mixed rf fso dual hop transmission systems"
    - "average rate of downlink heterogeneous cellular networks over generalized fading channels a stochastic geometry approach"
    - "on the capacity of free space optical intensity channels"

Connected through hyperedge HE-6 (induced by source paper "secrecy analysis of physical layer over kappa mu shadowed fading scenarios"):
  with members:
    - "the kappa mu shadowed fading model with integer fading parameters"
    - "secrecy capacity analysis over kappa mu fading channels theory and applications"

Connected through hyperedge HE-7 (induced by source paper "performance analysis of project and forward relaying in mixed mimo pinhole and rayleigh dual hop channel"):
  with members:
    - "diversity of mimo multihop relay channels part i amplify and forward"

Connected through hyperedge HE-8 (induced by source paper "wireless information and power transfer in relay systems with multiple antennas and interference"):
  with members:
    - "information and energy cooperation in cognitive radio networks"
    - "outage probability of dual hop multiple antenna af systems with linear processing in the presence of co channel interference"
    - "power allocation strategies in energy harvesting wireless cooperative networks"
    - "ergodic capacity comparison of different relay precoding schemes in dual hop af systems with co channel interference"
    - "secrecy wireless information and power transfer with miso beamforming"
    - "multiuser miso beamforming for simultaneous wireless information and power transfer"
    - "simultaneous information and energy transfer in large scale networks with without relaying"
    - "wireless information and energy transfer in multi antenna interference channel"

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)