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Communications and Networking. 17th EAI International Conference, Chinacom 2022, Virtual Event, November 19-20, 2022, Proceedings

Research Article

Adaptive Orthogonal Basis Scheme for OTFS

Cite
BibTeX Plain Text
  • @INPROCEEDINGS{10.1007/978-3-031-34790-0_5,
        author={Yinhua Jia and Sen Wang and Jing Jin and Hang Long},
        title={Adaptive Orthogonal Basis Scheme for OTFS},
        proceedings={Communications and Networking. 17th EAI International Conference, Chinacom 2022, Virtual Event, November 19-20, 2022, Proceedings},
        proceedings_a={CHINACOM},
        year={2023},
        month={6},
        keywords={OTFS delay-Doppler channel fractional Doppler effect},
        doi={10.1007/978-3-031-34790-0_5}
    }
    
  • Yinhua Jia
    Sen Wang
    Jing Jin
    Hang Long
    Year: 2023
    Adaptive Orthogonal Basis Scheme for OTFS
    CHINACOM
    Springer
    DOI: 10.1007/978-3-031-34790-0_5
Yinhua Jia1,*, Sen Wang, Jing Jin, Hang Long1
  • 1: Wireless Signal Processing and Network Lab Key Laboratory of Universal Wireless Communications, Ministry of Education Beijing University of Posts and Telecommunications
*Contact email: jiayinhua@163.com

Abstract

Orthogonal time frequency space (OTFS) modulation can provide significant error performance than orthogonal frequency division multiplexing (OFDM) modulation in the high-speed scenario. However, the fractional Doppler effects cause Doppler diffusion. In this paper, we analyze the Doppler diffusion from both the formula and geometric levels. In order to alleviate Doppler diffusion, we propose an adaptive orthogonal basis scheme by using the Doppler shifts feedback of the receiver. Our scheme alter the matrix of the inverse symplectic finite Fourier transform (ISFFT) by the feedback. This scheme makes it possible to estimate the channel more accurately. In the simulation results, we show that the bit error rate (BER) and block error rate (BLER) performance of our proposed scheme is not affected compared with OTFS. In addition, our scheme can work even if the Doppler domain dimension is limited and the Doppler shifts feedback of the receiver is inaccurate.

Keywords
OTFS delay-Doppler channel fractional Doppler effect
Published
2023-06-10
Appears in
SpringerLink
http://dx.doi.org/10.1007/978-3-031-34790-0_5
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