UAMP-Based Channel Estimation for OTFS in the Presence of the Fractional Doppler with HMM Prior
作者：周琳 时间：2022年08月13日 18:45 点击数：
语言：English
发表会议：2022 IEEE/CIC International Conference on Communications in China (ICCC Workshops)
发表日期：2022年8月13日
摘要：
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.
原文链接
