Blind CFO Estimator for OTFS Systems in Vehicle-to-Infrastructure Communications

被引：4

作者：

Chen, Wenxin ^{[1
]}

Liu, Aijun ^{[1
]}

Liang, Xiaohu ^{[1
,2
]}

Yue, Tong ^{[1
]}

Liang, Hao ^{[3
]}

机构：

[1] Army Engn Univ, Coll Commun Engn, Nanjing 210000, Peoples R China

[2] Southeast Univ, Sch Informat Sci & Engn, Nanjing 210000, Peoples R China

[3] Natl Univ Def Technol, Res Inst 63, Nanjing 210007, Peoples R China

来源：

IEEE WIRELESS COMMUNICATIONS LETTERS | 2023年 / 12卷 / 12期

基金：

中国国家自然科学基金;

关键词：

OTFS; vehicle-to-infrastructure communications; carrier frequency offset estimation; CARRIER FREQUENCY OFFSET;

D O I：

10.1109/LWC.2023.3306021

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

This letter proposes a blind carrier frequency offset (CFO) estimator for orthogonal time frequency space (OTFS) systems in vehicle-to-infrastructure (V2I) communications. Based on the property of the signal power in the delay-Doppler (DD) domain being affected by the CFO, the estimator minimizes the difference between the received signal power and the average channel power in the DD domain to achieve estimation. Moreover, the cost function design is theoretically justified as it optimizes performance by balancing the impact of channel gain on the received signal in the DD domain. According to simulation results, the proposed estimator is better suited to work in V2I communications than previous estimators.

引用

页码：2048 / 2052

页数：5

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