A combined timing and frequency synchronization and channel estimation for OFDM

被引：62
|
作者：
Minn, H [1 ]
Bhargava, VK
Letaief, KB
机构：
[1] Univ Texas, Dept Elect Engn, Richardson, TX 75083 USA
[2] Univ British Columbia, Dept Elect & Comp Engn, Vancouver, BC V6T 1Z4, Canada
[3] Hong Kong Univ Sci & Technol, Dept Elect & Elect Engn, Kowloon 190, Hong Kong, Peoples R China
来源：
IEEE TRANSACTIONS ON COMMUNICATIONS | 2006年 / 54卷 / 03期
基金：
加拿大自然科学与工程研究理事会;
关键词：
channel estimation; frequency synchronization; maximuni-likelihood (ML) estimation; orthogonal frequency-division multiplexing (OFDM); timing synchronization;
D O I：
10.1109/TCOMM.2006.869860
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：
This letter addresses training-signal-based combined timing and frequency synchronization and channel estimation for orthogonal frequency-division multiplexing systems. The proposed scheme consists of two stages. At the first stage, coarse timing and frequency-offset estimates are obtained. Based on these estimates, a (coarse) channel response estimate is obtained. The timing and frequency-offset estimates at the second stage are obtained by maximum-likelihood (ML) realization based on a sliding observation vector. Then ML channel estimation is performed. A means of complexity reduction by an adaptive scheme is also presented. The simulation results show that the proposed combined approach performs quite well, and circumvents the problem of mismatch among individual synchronization tasks.
引用
收藏
页码：416 / 422
页数：7
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