human: Given a hyperedge-centered hypergraph: <hypergraph>, where the center hyperedge is induced by one source paper and its member nodes are the cited papers.

Details of the hypergraph:
Center hyperedge (induced by source paper "on the impact of time varying interference channel on the spatial approach of spectrum sharing between s band radar and communication system"):
  Abstract: Spectrum sharing is a new approach to solve the congestion problem in RF spectrum. A spatial approach for spectrum sharing between radar and communication system was proposed, which mitigates the radar interference to communication by projecting the radar waveform onto null space of interference channel, between radar and communication system [1]. In this work, we extend this approach to maritime MIMO radar which experiences time varying interference channel due to the oscillatory motion of ship, because of the breaking of sea/ocean waves. We model this variation by using the matrix perturbation theory and the statistical distribution of the breaking waves. This model is then used to study the impact of perturbed interference channel on the spatial approach of spectrum sharing. We use the maximum likelihood (ML) estimate of target's angle of arrival to study the radar's performance when its waveform is projected onto the null space of the perturbed interference channel. Through our analytical and simulation results, we study the loss in the radar's performance due to the null space projection (NSP) of its waveform on the perturbed interference channel.

Includes members:
  Member "optimal downlink power allocation in cellular networks":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "position estimation of robotic mobile nodes in wireless testbed using geni")
  Member "qpsk waveform for mimo radar with spectrum sharing constraints":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "coexistence analysis between radar and cellular system in los channel")
  Member "3d channel modeling between seaborne mimo radar and mimo cellular system":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "target detection performance of spectrum sharing mimo radars")
  Member "target detection performance of spectrum sharing mimo radars":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "toward dual functional radar communication systems optimal waveform design")
  Member "a utility proportional fairness resource allocation in spectrally radar coexistent cellular networks":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "position estimation of robotic mobile nodes in wireless testbed using geni")

Question: Please tell me which class the source paper 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)