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: "gateway switching in q v band satellite feeder links"
  Abstract: A main challenge towards realizing the next generation Terabit/s broadband satellite communications (SatCom) is the limited spectrum available in the Ka band. An attractive solution is to move the feeder link to the higher Q/V band, where more spectrum is available. When utilizing the Q/V band, due to heavy rain attenuation, gateway diversity is considered a necessity to ensure the required feeder link availability. Although receive site diversity has been studied in the past for SatCom, there is much less maturity in terms of transmit diversity techniques. In this paper, a modified switch and stay combining scheme is proposed for a Q/V band feeder link, but its performance is also evaluated over an end-to-end satellite link. The proposed scheme is pragmatic and has close to optimal performance with notably lower complexity.

Connected through hyperedge HE-1 (induced by source paper "precoding in multibeam satellite communications present and future challenges"):
  with members:
    - "multicast multigroup precoding and user scheduling for frame based satellite communications"
    - "sum rate maximizing multigroup multicast beamforming under per antenna power constraints"
    - "frame based precoding in satellite communications a multicast approach"
    - "full frequency reuse multibeam satcoms frame based precoding and user scheduling"
    - "weighted fair multicast multigroup beamforming under per antenna power constraints"
    - "multi gateway cooperation in multibeam satellite systems"

Connected through hyperedge HE-2 (induced by source paper "dvb s2x enabled precoding for high throughput satellite systems"):
  with members:
    - "frame based precoding in satellite communications a multicast approach"
    - "full frequency reuse multibeam satcoms frame based precoding and user scheduling"
    - "weighted fair multicast multigroup beamforming under per antenna power constraints"
    - "generic optimization of linear precoding in multibeam satellite systems"

Connected through hyperedge HE-3 (induced by source paper "on board beam generation for multibeam satellite systems"):
  with members:
    - "multi gateway cooperation in multibeam satellite systems"
    - "generic optimization of linear precoding in multibeam satellite 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)