An Improved Timing Synchronization Method for Broadband OFDM Based Power Line Communication

被引：0
|
作者：
Wu, Wenjing [1 ]
Bie, Hongxia [1 ]
Zhang, Xuekun [1 ]
机构：
[1] Beijing Univ Posts & Telecommun, Sch Informat & Commun Engn, Beijing, Peoples R China
来源：
2014 9TH INTERNATIONAL CONFERENCE ON COMMUNICATIONS AND NETWORKING IN CHINA (CHINACOM) | 2014年
关键词：
power line communications (PLC); OFDM timing synchronization; coarse estimation and fine estimation; adaptive;
D O I：
暂无
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, we analyze the timing synchronization for OFDM based broadband power line communication (PLC) systems. Four classical methods are studied over a PLC channel. Based on detailed performance comparison and complexity analysis, this paper proposes an improved method, which uses a repeated-conjugated-centrosymmetric preamble and consists of two stages, namely, coarse estimation and fine estimation. By the proposed method, the estimation accuracy in low SNR (signal-to-noise ratio) condition is significantly improved. In addition, an implement scheme adaptive to SNR changes is presented and applied to the proposed method to get further complexity reduction. Simulations validate that, with relatively less computation, the proposed algorithm has a much smaller mean square error (MSE) in the SNR range from 0dB to 14dB.
引用
收藏
页码：214 / 219
页数：6
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