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: "3d channel modeling between seaborne mimo radar and mimo cellular system"
  Abstract: Spectrum sharing between radars and cellular systems is an emerging area of research. In this paper, we model channel between a seaborne MIMO radar and MIMO cellular system. We model a 2D channel to capture the azimuth aspect of the spectrum sharing scenario. Our channel modeling methodology allows MIMO radar to place accurate nulls in the azimuth location of base stations (BS), thus, protecting them from harmful radar interference. We use a projection based approach, where radar waveform is projected onto null space of channel, for mitigating radar interference to BSs. This is also known as an approach based on eigen-nulling which is different from spatial-nulling commonly employed by radars. We show through simulations that the proposed spatial channel model allows eigen-nulling which performs superior to traditional spatial-nulling for interference mitigation. The proposed channel model can be leveraged to use eigen-nulling that enhances target detection and beampattern resolution of MIMO radar while mitigating interference to BSs.

Connected through hyperedge HE-1 (induced by source paper "target detection performance of spectrum sharing mimo radars"):
  with members:
    - "coexistence analysis between radar and cellular system in los channel"
    - "qpsk waveform for mimo radar with spectrum sharing constraints"
    - "overlapped mimo radar waveform design for coexistence with communication systems"
    - "radar precoder design for spectral coexistence with coordinated multi point comp system"
    - "a utility proportional fairness resource allocation in spectrally radar coexistent cellular networks"
    - "on the impact of time varying interference channel on the spatial approach of spectrum sharing between s band radar and communication system"

Connected through hyperedge HE-2 (induced by source paper "qpsk waveform for mimo radar with spectrum sharing constraints"):
  with members:
    - "coexistence analysis between radar and cellular system in los channel"
    - "target detection performance of spectrum sharing mimo radars"
    - "a utility proportional fairness resource allocation in spectrally radar coexistent cellular networks"
    - "on the impact of time varying interference channel on the spatial approach of spectrum sharing between s band radar and communication system"

Connected through hyperedge HE-3 (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"):
  with members:
    - "optimal downlink power allocation in cellular networks"
    - "qpsk waveform for mimo radar with spectrum sharing constraints"
    - "target detection performance of spectrum sharing mimo radars"
    - "a utility proportional fairness resource allocation in spectrally radar coexistent cellular networks"

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)