Joint fast time-varying channel estimation with noise elimination and ICI cancellation for LTE-V2X systems

被引：2
作者：
Liao, Yong [1 ]
Yin, Zisong [1 ]
Sun, Guodong [1 ]
机构：
[1] Chongqing Univ, Sch Microelect & Commun Engn, Chongqing 400044, Peoples R China
来源：
PHYSICAL COMMUNICATION | 2022年 / 55卷
基金：
中国国家自然科学基金;
关键词：
Channel estimation; LTE-V2X; Fast time -varying channel; Discrete Fourier transform; Iterative direct decision; Channel fitting; (ITS) integrating transportation services; wireless communica; SCHEME;
D O I：
10.1016/j.phycom.2022.101900
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Vehicle-to-everything (V2X) communication is essential for intelligent transportation systems (ITS) and critical technology to ensure traffic safety. Aiming at the problems of noise interference, time-varying, and inter-carrier interference (ICI) in the LTE-V2X channel, a joint fast time-varying channel estimation with noise elimination and ICI cancellation is proposed in this paper. Firstly, using the autocorrelation characteristics of the Zadoff Chu (ZC) pilot sequence, a modified discrete Fourier transform (M-DFT) channel estimation algorithm is proposed to eliminate the noise in cyclic prefix (CP). Secondly, a joint iterative direct decision (IDD) and time-varying channel fitting (CF), called IDD-CF channel estimation algorithm, is proposed to track the rapid changes of channels on different symbols and eliminate ICI. The system simulation results show that the proposed joint fast time-varying channel estimation algorithm can effectively eliminate the noise and ICI, improve the performance of channel estimation, and have better robustness under different Doppler frequency shifts than the representative channel estimation algorithm. (c) 2022 Elsevier B.V. All rights reserved.
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页数：11
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