An Highly-effective Time and Frequency Synchronization Scheme for OFDM Wireless Communication System
A time and frequency synchronization scheme for OFDM wireless communication system based on a novel training sequence is proposed. The training sequence includes only one OFDM symbol. It is centro-symmetric and only modulated on even sub-carriers, the second half of which is duplicate of the first half. So, timing metric can avoid peak plateau, and frequency offset estimator can effectively resist multi-path fading. Besides, through conjugate correlation operation between every two adjacent even sub-carriers, one cycle m-sequence can be obtained. Taking advantage of real-value and two-value correlation characteristics of m-sequence, integer frequency offset estimator can show impulse feature with largely decreased computational complexity. Computer simulation shows, compared with the classic synchronization scheme, the proposed one can realize precise timing capture and the whole base-band frequency offset estimation under multi-path fading environment with only one symbol. Its of high efficiency, low complexity, and fits low SNR environment.
OFDM synchronization timing and frequency offset estimation training sequence m-sequence
Han Gujing Qin Liang
Wuhan University of Science and Engineering Wuhan, 430073 China Wuhan University Wuhan, 430072 China
国际会议
北京
英文
466-471
2009-10-27（万方平台首次上网日期，不代表论文的发表时间）