Research on Doppler shift estimation algorithm for SC-FDE wireless communication system
Tao Liao, Bing Li · Third International Symposium on Computer Engineering and Intelligent Communications (ISCEIC 2022) · 2023
In order to solve the problem of doppler shift caused by high-speed movement of maglev train and high carrier frequency of train-ground wireless communication system, this paper studies the Doppler shift estimation algorithm of SC-FDE system and proposes a two-stage estimation algorithm based on the excellent correlation characteristics of gray sequence. Firstly, the coarse estimation and compensation of doppler shift are carried out by using the gray sequence in the preamble training sequence. Then the fine estimation and compensation of Doppler shift are carried out by using the gray sequence inserted in the data block. Simulation analysis and experimental verification are carried out. The results show that the proposed algorithm can significantly improve the throughput performance of train-ground wireless communication system in high-speed mobile environment. The algorithm has high estimation accuracy and is easy to be implemented by hardware. It can be extended to SC-FDE systems in other large doppler scenarios.