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: "overlapped mimo radar waveform design for coexistence with communication systems"
  Abstract: This paper explores an overlapped-multiple-input multiple-output (MIMO) antenna architecture and a spectrum sharing algorithm via null space projection (NSP) for radar-communications coexistence. In the overlapped-MIMO architecture, the transmit array of a collocated MIMO radar is partitioned into a number of subarrays that are allowed to overlap. Each of the antenna elements in these subarrays have signals orthogonal to each other and to the elements of the other subarrays. The proposed architecture not only improves sidelobe suppression to reduce interference to communications system, but also enjoys the advantages of MIMO radar without sacrificing the main desirable characteristics. The radar-centric spectrum sharing algorithm then projects the radar signal onto the null space of the communications system's interference channel, which helps to avoid interference from the radar. Numerical results are presented which show the performance of the proposed waveform design algorithm in terms of overall beampattern and sidelobe levels of the radar waveform and finally shows a comparison of the proposed system with existing collocated MIMO radar architectures.

Connected through hyperedge HE-1 (induced by source paper "interference exploitation for radar and cellular coexistence the power efficient approach"):
  with members:
    - "robust mimo beamforming for cellular and radar coexistence"
    - "coexistence analysis between radar and cellular system in los channel"
    - "optimum co design for spectrum sharing between matrix completion based mimo radars and a mimo communication system"
    - "constructive interference through symbol level precoding for multi level modulation"
    - "exploiting known interference as green signal power for downlink beamforming optimization"
    - "target detection performance of spectrum sharing mimo radars"
    - "cooperative radar and communications signaling the estimation and information theory odd couple"
    - "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 "optimum co design for spectrum sharing between matrix completion based mimo radars and a mimo communication system"):
  with members:
    - "mimo mc radar a mimo radar approach based on matrix completion"
    - "spatial compressive sensing for mimo radar"
    - "matrix completion in colocated mimo radar recoverability bounds theoretical guarantees"
    - "target estimation in colocated mimo radar via matrix completion"
    - "complex valued random vectors and channels entropy divergence and capacity"
    - "mimo radar using compressive sampling"
    - "dynamic resource allocation in cognitive radio networks"
    - "matrix completion with noise"

Connected through hyperedge HE-3 (induced by source paper "coexistence analysis between radar and cellular system in los channel"):
  with members:
    - "separation of signals consisting of amplitude and instantaneous frequency rrc pulses using snr uniform training"
    - "qpsk waveform for mimo radar with spectrum sharing constraints"
    - "target detection performance of spectrum sharing mimo radars"
    - "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-4 (induced by source paper "3d channel modeling between seaborne mimo radar and mimo cellular system"):
  with members:
    - "coexistence analysis between radar and cellular system in los channel"
    - "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"
    - "on the impact of time varying interference channel on the spatial approach of spectrum sharing between s band radar and communication system"
    - "preliminary results on 3d channel modeling from theory to standardization"

Connected through hyperedge HE-5 (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"
    - "3d channel modeling between seaborne mimo radar and mimo cellular system"
    - "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-6 (induced by source paper "three dimensional 3d channel modeling between seaborne mimo radar and mimo cellular system"):
  with members:
    - "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"
    - "on the impact of time varying interference channel on the spatial approach of spectrum sharing between s band radar and communication system"
    - "preliminary results on 3d channel modeling from theory to standardization"

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)