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 "embedded pilot aided channel estimation for otfs in delay doppler channels"):
  Abstract: Orthogonal time frequency space (OTFS) modulation was shown to provide significant error performance advantages over orthogonal frequency division multiplexing (OFDM) in delay--Doppler channels. In order to detect OTFS modulated data, the channel impulse response needs to be known at the receiver. In this paper, we propose embedded pilot-aided channel estimation schemes for OTFS. In each OTFS frame, we arrange pilot, guard, and data symbols in the delay--Doppler plane to suitably avoid interference between pilot and data symbols at the receiver. We develop such symbol arrangements for OTFS over multipath channels with integer and fractional Doppler shifts, respectively. At the receiver, channel estimation is performed based on a threshold method and the estimated channel information is used for data detection via a message passing (MP) algorithm. Thanks to our specific embedded symbol arrangements, both channel estimation and data detection are performed within the same OTFS frame with a minimum overhead. We compare by simulations the error performance of OTFS using the proposed channel estimation and OTFS with ideally known channel information and observe only a marginal performance loss. We also demonstrate that the proposed channel estimation in OTFS significantly outperforms OFDM with known channel information. Finally, we present extensions of the proposed schemes to MIMO and multi-user uplink/downlink.

Includes members:
  Member "orthogonal time frequency space modulation":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "channel estimation for orthogonal time frequency space otfs massive mimo")
  Member "otfs a new generation of modulation addressing the challenges of 5g":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "otfs interleaved ofdm with block cp")
  Member "interference cancellation and iterative detection for orthogonal time frequency space modulation":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "otfs based receiver scheme with multi antennas in high mobility v2x systems")
  Member "low complexity equalization for orthogonal time and frequency signaling otfs":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "orthogonal time frequency space modulation")
  Member "analysis of discrete time mimo ofdm based orthogonal time frequency space modulation":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "otfs based receiver scheme with multi antennas in high mobility v2x systems")
  Member "orthogonal precoding for ultra reliable wireless communication links":
    also connected through other hyperedges:
      - Hyperedge HE-6 (induced by source paper "orthogonal time frequency space modulation")
  Member "low complexity modem structure for ofdm based orthogonal time frequency space modulation":
    also connected through other hyperedges:
      - Hyperedge HE-7 (induced by source paper "channel estimation for orthogonal time frequency space otfs massive mimo")

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)