TY - GEN
T1 - UAMP-Based Channel Estimation for OTFS in the Presence of the Fractional Doppler with HMM Prior
AU - Li, Zhongjie
AU - Yuan, Weijie
AU - Zhou, Lin
N1 - Publisher Copyright:
© 2022 IEEE.
PY - 2022
Y1 - 2022
N2 - Orthogonal time frequency space (OTFS) modulation is a promising candidate to support reliable information transmission in high-mobility wireless communications. In this paper, we consider the channel estimation problem for OTFS in the presence of fractional Doppler. We first propose a statistical channel model based on the hidden Markov model (HMM) to characterize the structured sparsity of the effective delay-Doppler (DD) domain channel. The HMM prior is then incorporated with the unitary approximate message passing (UAMP) algorithm to solve the structured sparse channel estimation problem. Finally, simulation results verify that the proposed algorithm can achieve a significant gain over various state-of-art algorithms.
AB - Orthogonal time frequency space (OTFS) modulation is a promising candidate to support reliable information transmission in high-mobility wireless communications. In this paper, we consider the channel estimation problem for OTFS in the presence of fractional Doppler. We first propose a statistical channel model based on the hidden Markov model (HMM) to characterize the structured sparsity of the effective delay-Doppler (DD) domain channel. The HMM prior is then incorporated with the unitary approximate message passing (UAMP) algorithm to solve the structured sparse channel estimation problem. Finally, simulation results verify that the proposed algorithm can achieve a significant gain over various state-of-art algorithms.
KW - chan-nel estimation
KW - hidden Markov model (HMM)
KW - orthogonal time frequency space (OTFS)
KW - unitary approxi-mate message passing (UAMP)
UR - https://www.scopus.com/pages/publications/85141167607
U2 - 10.1109/ICCCWorkshops55477.2022.9896709
DO - 10.1109/ICCCWorkshops55477.2022.9896709
M3 - 会议稿件
AN - SCOPUS:85141167607
T3 - 2022 IEEE/CIC International Conference on Communications in China, ICCC Workshops 2022
SP - 304
EP - 308
BT - 2022 IEEE/CIC International Conference on Communications in China, ICCC Workshops 2022
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2022 IEEE/CIC International Conference on Communications in China, ICCC Workshops 2022
Y2 - 11 August 2022 through 13 August 2022
ER -