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: "analysis of discrete time mimo ofdm based orthogonal time frequency space modulation"
  Abstract: Orthogonal Time Frequency Space (OTFS) is a novel modulation scheme designed in the Doppler-delay domain to fully exploit time and frequency diversity of general time-varying channels. In this paper, we present a novel discrete-time analysis of OFDM-based OTFS transceiver with a concise and vectorized input-output relationship that clearly characterizes the contribution of each underlying signal processing block in such systems. When adopting cyclic prefix in the time domain, our analysis reveals that the proposed MIMO OTFS and OFDM systems have the same ergodic capacity despite the well-known fact that the former has great advantages in low-complexity receiver design for high Doppler channels. The proposed discrete-time vectorized formulation is applicable to general fast fading channels with arbitrary window functions. It also enables practical low-complexity receiver design for which such a concise formulation of the input-output relationship is of great benefits.

Connected through hyperedge HE-1 (induced by source paper "otfs based receiver scheme with multi antennas in high mobility v2x systems"):
  with members:
    - "low complexity linear equalization for otfs systems with rectangular waveforms"
    - "otfs noma an efficient approach for exploiting heterogenous user mobility profiles"
    - "robust beamforming design for otfs noma"
    - "channel estimation for orthogonal time frequency space otfs massive mimo"
    - "mimo otfs in high doppler fading channels signal detection and channel estimation"
    - "interference cancellation and iterative detection for orthogonal time frequency space modulation"
    - "high mobility ofdm downlink transmission with large scale antenna array"

Connected through hyperedge HE-2 (induced by source paper "otfs noma an efficient approach for exploiting heterogenous user mobility profiles"):
  with members:
    - "on the diversity of uncoded otfs modulation in doubly dispersive channels"
    - "on the diversity of otfs modulation in doubly dispersive channels"
    - "mimo otfs in high doppler fading channels signal detection and channel estimation"
    - "otfs a new generation of modulation addressing the challenges of 5g"
    - "on otfs modulation for high doppler fading channels"
    - "interference cancellation and iterative detection for orthogonal time frequency space modulation"
    - "impact of non orthogonal multiple access on the offloading of mobile edge computing"
    - "nr wide bandwidth operations"

Connected through hyperedge HE-3 (induced by source paper "low complexity linear equalization for otfs systems with rectangular waveforms"):
  with members:
    - "otfs noma an efficient approach for exploiting heterogenous user mobility profiles"
    - "channel estimation for orthogonal time frequency space otfs massive mimo"
    - "otfs a new generation of modulation addressing the challenges of 5g"
    - "interference cancellation and iterative detection for orthogonal time frequency space modulation"
    - "a simple two stage equalizer with simplified orthogonal time frequency space modulation over rapidly time varying channels"
    - "low complexity modem structure for ofdm based orthogonal time frequency space modulation"

Connected through hyperedge HE-4 (induced by source paper "orthogonal time frequency space modulation"):
  with members:
    - "on otfs modulation for high doppler fading channels"
    - "a simple two stage equalizer with simplified orthogonal time frequency space modulation over rapidly time varying channels"
    - "low complexity equalization for orthogonal time and frequency signaling otfs"
    - "orthogonal precoding for ultra reliable wireless communication links"
    - "low complexity modem structure for ofdm based orthogonal time frequency space modulation"
    - "otfs orthogonal time frequency space"
    - "comparison of the achievable rates in ofdm and single carrier modulation with i i d inputs"
    - "what will 5g be"

Connected through hyperedge HE-5 (induced by source paper "embedded pilot aided channel estimation for otfs in delay doppler channels"):
  with members:
    - "orthogonal time frequency space modulation"
    - "otfs a new generation of modulation addressing the challenges of 5g"
    - "interference cancellation and iterative detection for orthogonal time frequency space modulation"
    - "low complexity equalization for orthogonal time and frequency signaling otfs"
    - "orthogonal precoding for ultra reliable wireless communication links"
    - "low complexity modem structure for ofdm based orthogonal time frequency space modulation"

Connected through hyperedge HE-6 (induced by source paper "mimo otfs in high doppler fading channels signal detection and channel estimation"):
  with members:
    - "otfs a new generation of modulation addressing the challenges of 5g"
    - "on otfs modulation for high doppler fading channels"
    - "a simple two stage equalizer with simplified orthogonal time frequency space modulation over rapidly time varying channels"
    - "low complexity modem structure for ofdm based orthogonal time frequency space modulation"
    - "otfs orthogonal time frequency space"

Connected through hyperedge HE-7 (induced by source paper "interference cancellation and iterative detection for orthogonal time frequency space modulation"):
  with members:
    - "otfs a new generation of modulation addressing the challenges of 5g"
    - "a simple two stage equalizer with simplified orthogonal time frequency space modulation over rapidly time varying channels"
    - "low complexity modem structure for ofdm based orthogonal time frequency space modulation"
    - "low complexity detection in large dimension mimo isi channels using graphical models"
    - "noncoherent capacity of underspread fading channels"

Connected through hyperedge HE-8 (induced by source paper "on otfs modulation for high doppler fading channels"):
  with members:
    - "a simple two stage equalizer with simplified orthogonal time frequency space modulation over rapidly time varying channels"
    - "low complexity modem structure for ofdm based orthogonal time frequency space modulation"
    - "otfs orthogonal time frequency space"
    - "near optimal detection in mimo systems using gibbs sampling"

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)