Blind Fast CFO Estimation and Performance Analysis for OFDM

被引：23

作者：

Meng, Yue ^{[1
]}

Zhang, Weile ^{[1
]}

Stuber, Gordon L. ^{[2
]}

Wang, Wenjie ^{[1
]}

机构：

[1] Xi An Jiao Tong Univ, Sch Elect & Informat Engn, Xian 710049, Peoples R China

[2] Georgia Inst Technol, Sch Elect & Comp Engn, Atlanta, GA 30332 USA

来源：

IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY | 2020年 / 69卷 / 10期

基金：

中国国家自然科学基金;

关键词：

Carrier frequency offset (CFO); blind estimation; low-complexity; orthogonal frequency division multiplexing (OFDM); CARRIER FREQUENCY OFFSET; SYSTEMS; SYNCHRONIZATION; TIME; MIMO;

D O I：

10.1109/TVT.2020.3012968

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：

Estimation of carrier frequency offset (CFO) is a crucial task for orthogonal frequency-division multiplexing (OFDM) systems, and it should be performedwith affordable computational complexity for practicality. This paper proposes two blind and fast CFO estimators for OFDM systems based on null subcarriers. Compared with the existing null subcarriers based estimators, the computational complexity is significantly reduced by avoiding an exhaustive grid searching or a high-order polynomial rooting procedure. The mean squared error (MSE) performance of the proposed CFO estimator is also studied in theory. In addition, the Cramer-Rao bound (CRB) of the CFO estimation for OFDM systems with null subcarriers is derived. Numerical results are provided by computer simulation to verify the validity of theoretical performance analysis and demonstrate the superiority of the proposed estimators.

引用

页码：11501 / 11514

页数：14

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