TY - GEN
T1 - Low-Complexity Belief Propagation detector for OTFS System
AU - Zhang, Yang
AU - Zhang, Qunfei
AU - He, Chengbing
AU - Ma, Meiling
AU - Wang, Yingjie
N1 - Publisher Copyright:
© 2021 IEEE.
PY - 2021/8/17
Y1 - 2021/8/17
N2 - The orthogonal time frequency space (OTFS) modulation has emerged as a potential candidate modulation scheme for high mobility wireless communications. However, the matrix-inversion based detectors have prohibitively high complexity in OTFS systems due to high-dimensional channel matrix. In this paper, a low complexity belief propagation (BP) detection algorithm is therefore proposed for OTFS modulation over delay-Doppler channels. Specifically, the sparse feature of the equivalent channel matrix and the approximate probability update scheme are utilized to reduce computational complexity. In addition, we also add a damping factor to improve the convergence of the proposed algorithm, which brings substantial performance. Numerical simulation results that the proposed detection scheme effectively improves the bit error rate (BER) performance for OTFS systems.
AB - The orthogonal time frequency space (OTFS) modulation has emerged as a potential candidate modulation scheme for high mobility wireless communications. However, the matrix-inversion based detectors have prohibitively high complexity in OTFS systems due to high-dimensional channel matrix. In this paper, a low complexity belief propagation (BP) detection algorithm is therefore proposed for OTFS modulation over delay-Doppler channels. Specifically, the sparse feature of the equivalent channel matrix and the approximate probability update scheme are utilized to reduce computational complexity. In addition, we also add a damping factor to improve the convergence of the proposed algorithm, which brings substantial performance. Numerical simulation results that the proposed detection scheme effectively improves the bit error rate (BER) performance for OTFS systems.
KW - Belief propagation
KW - Delay-Doppler channels
KW - OTFS
UR - https://www.scopus.com/pages/publications/85118451620
U2 - 10.1109/ICSPCC52875.2021.9564852
DO - 10.1109/ICSPCC52875.2021.9564852
M3 - 会议稿件
AN - SCOPUS:85118451620
T3 - Proceedings of 2021 IEEE International Conference on Signal Processing, Communications and Computing, ICSPCC 2021
BT - Proceedings of 2021 IEEE International Conference on Signal Processing, Communications and Computing, ICSPCC 2021
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2021 IEEE International Conference on Signal Processing, Communications and Computing, ICSPCC 2021
Y2 - 17 August 2021 through 19 August 2021
ER -