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: "multi gateway cooperation in multibeam satellite systems"
  Abstract: Multibeam systems with hundreds of beams have been recently deployed in order to provide higher capacities by employing fractional frequency reuse. Furthermore, employing full frequency reuse and precoding over multiple beams has shown great throughput potential in literature. However, feeding all this data from a single gateway is not feasible based on the current frequency allocations. In this context, we investigate a range of scenarios involving beam clusters where each cluster is managed by a single gateway. More specifically, the following cases are considered for handling intercluster interference: a) conventional frequency colouring, b) joint processing within cluster, c) partial CSI sharing among clusters, d) partial CSI and data sharing among clusters. CSI sharing does not provide considerable performance gains with respect to b) but combined with data sharing offers roughly a 40% improvement over a) and a 15% over b).

Connected through hyperedge HE-1 (induced by source paper "generalized multicast multibeam precoding for satellite communications"):
  with members:
    - "dvb s2x enabled precoding for high throughput satellite systems"
    - "multicast multigroup precoding and user scheduling for frame based satellite communications"
    - "frame based precoding in satellite communications a multicast approach"
    - "generic optimization of linear precoding in multibeam satellite systems"

Connected through hyperedge HE-2 (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"
    - "gateway switching in q v band satellite feeder links"

Connected through hyperedge HE-3 (induced by source paper "precoding in multigateway multibeam satellite systems"):
  with members:
    - "ergodic capacity analysis of free space optical links with nonzero boresight pointing errors"
    - "dvb s2x enabled precoding for high throughput satellite systems"
    - "multicast multigroup precoding and user scheduling for frame based satellite communications"
    - "frame based precoding in satellite communications a multicast approach"
    - "generic optimization of linear precoding in multibeam satellite systems"

Connected through hyperedge HE-4 (induced by source paper "multicast multigroup precoding and user scheduling for frame based satellite communications"):
  with members:
    - "optimal multiuser transmit beamforming a difficult problem with a simple solution structure"
    - "sum rate maximizing multigroup multicast beamforming under per antenna power constraints"
    - "frame based precoding in satellite communications a multicast approach"
    - "multicast multigroup beamforming under per antenna power constraints"
    - "weighted fair multicast multigroup beamforming under per antenna power constraints"
    - "user scheduling for coordinated dual satellite systems with linear precoding"
    - "generic optimization of linear precoding in multibeam satellite systems"

Connected through hyperedge HE-5 (induced by source paper "on board beam generation for multibeam satellite systems"):
  with members:
    - "gateway switching in q v band satellite feeder links"
    - "generic optimization of linear precoding in multibeam satellite systems"

Connected through hyperedge HE-6 (induced by source paper "multi user detection in multibeam mobile satellite systems a fair performance evaluation"):
  with members:
    - "networked mimo with clustered linear precoding"

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)