Iterative Approach for Multiuser Carrier Frequency Offset Estimation in Interleaved OFDMA Uplink

被引：15

作者：

Miao, Ruiqin ^{[1
,2
]}

Xiong, Jian ^{[1
,2
]}

Gui, Lin ^{[1
,2
]}

Sun, Jun ^{[1
,2
]}

机构：

[1] Shanghai Jiao Tong Univ, Dept Elect Engn, Inst Image Commun & Informat Proc, Shanghai 200240, Peoples R China

[2] Shanghai Jiao Tong Univ, Shanghai Key Lab Digital Media Proc & Transmiss, Shanghai 200240, Peoples R China

来源：

IEEE TRANSACTIONS ON CONSUMER ELECTRONICS | 2009年 / 55卷 / 03期

基金：

国家杰出青年科学基金;

关键词：

Carrier frequency offset (CFO); interleaved orthogonal frequency division multiple access; (OFDMA); iterative method; SYNCHRONIZATION; TIME;

D O I：

10.1109/TCE.2009.5277953

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：

In this paper, the issue of carrier frequency offset (CFO) estimation in interleaved orthogonal frequency, division multiple access (OFDMA) uplink systems is investigated. The problem of peaks ambiguity in MUSIC estimator proposed by Cao and Yao is analyzed firstly, and then a searching solution is presented. Furthermore, a new iterative algorithm based on this MUSIC estimator is proposed. The proposed approach iteratively searches for the correct CFO vector by minimizing the objective function using a first-order Taylor series approximation of the CFO vector. It can conquer the effect of ambiguous peaks effectively, performs better than Cao and Yao's approach in relatively low, SNR region and large CFO, and at the same time has much lower computational complexity. Simulations illustrate the efficiency of the proposed algorithm(1).

引用

页码：1039 / 1044

页数：6

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