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 otfs modulation for high doppler fading channels"):
  Abstract: Orthogonal time frequency space (OTFS) modulation is a 2-dimensional (2D) modulation scheme designed in the delay-Doppler domain, unlike traditional modulation schemes which are designed in the time-frequency domain. Through a series of 2D transformations, OTFS converts a doubly-dispersive channel into an almost non-fading channel in the delay-Doppler domain. In this domain, each symbol in a frame experiences an almost constant fade, thus achieving significant performance gains over existing modulation schemes such as OFDM. The sparse delay-Doppler impulse response which reflects the actual physical geometry of the wireless channel enables efficient channel estimation, especially in high-Doppler fading channels. This paper investigates OTFS from a signal detection and channel estimation perspective, and proposes a Markov chain Monte-Carlo sampling based detection scheme and a pseudo-random noise (PN) pilot based channel estimation scheme in the delay-Doppler domain.

Includes members:
  Member "a simple two stage equalizer with simplified orthogonal time frequency space modulation over rapidly time varying channels":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "channel estimation for orthogonal time frequency space otfs massive mimo")
  Member "analysis of discrete time mimo ofdm based orthogonal time frequency space modulation":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "otfs based receiver scheme with multi antennas in high mobility v2x systems")
  Member "low complexity modem structure for ofdm based orthogonal time frequency space modulation":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "channel estimation for orthogonal time frequency space otfs massive mimo")
  Member "otfs orthogonal time frequency space":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "non orthogonal multiple access with orthogonal time frequency space signal transmission")
  Member "near optimal detection in mimo systems using gibbs sampling":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "deep learning aided tabu search detection for large mimo systems")

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)