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 "qpsk waveform for mimo radar with spectrum sharing constraints"):
  Abstract: Multiple-input multiple-output (MIMO) radar is a relatively new concept in the field of radar signal processing. Many novel MIMO radar waveforms have been developed by considering various performance metrics and constraints. In this paper, we show that finite alphabet constant-envelope (FACE) quadrature-pulse shift keying (QPSK) waveforms can be designed to realize a given covariance matrix by transforming a constrained nonlinear optimization problem into an unconstrained nonlinear optimization problem. In addition, we design QPSK waveforms in a way that they do not cause interference to cellular system, by steering nulls towards a selected base station (BS). The BS is selected according to our algorithm which guarantees minimum degradation in radar performance due to null space projection (NSP) of radar waveforms. We design QPSK waveforms with spectrum sharing constraints for stationary and moving radar platform. We show that the waveform designed for stationary MIMO radar matches the desired beampattern closely, when the number of BS antennas N BS is considerably less than the number of radar antennas M , due to quasi-static interference channel. However, for moving radar the difference between designed and desired waveforms is larger than stationary radar, due to rapidly changing wireless channel.

Includes members:
  Member "coexistence analysis between radar and cellular system in los channel":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "interference exploitation for radar and cellular coexistence the power efficient approach")
  Member "3d channel modeling between seaborne mimo radar and mimo cellular system":
    also connected through other hyperedges:
      - Hyperedge HE-2 (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-3 (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-4 (induced by source paper "position estimation of robotic mobile nodes in wireless testbed using geni")
  Member "on the impact of time varying interference channel on the spatial approach of spectrum sharing between s band radar and communication system":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "interference exploitation for radar and cellular coexistence the power efficient approach")

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.NI(Networking and Internet Architecture)