Efficient Timing and Frequency Offset Estimation Scheme for OFDM Systems

• Published in: Transactions of Tianjin University Vol. 15; no. 1; pp. 27 - 31
• Main Author: 郭漪 葛建华 刘刚 张武军
• Format: Journal Article
• Language: English
• Published: Heidelberg Tianjin University 01.02.2009; National Key Laboratory of Integrated Service Networks,Xidian University,Xi'an 710071,China
• Subjects: Engineering; Humanities and Social Sciences; Mechanical Engineering; multidisciplinary; OFDM; Science; 无线电通信; 正交频分复用技术; 通信信号处理; time synchronization; frequency synchronization; training symbol; orthogonal frequency division multiplexing (OFDM) technique; orthogonal frequency division multiplexing(OFDM)technique
• ISSN: 1006-4982; 1995-8196
• DOI: 10.1007/s12209-009-0006-5

A new training symbol weighted by pseudo-noise（PN） sequence is designed and an efficient timing and frequency offset estimation scheme for orthogonal frequency division multiplexing（OFDM） systems is proposed. The timing synchronization is accomplished by using the piecewise symmetric conjugate of the primitive training symbol and the good autocorrelation of PN weighted factor. The frequency synchronization is finished by utilizing the training symbol whose PN weighted factor is removed after the timing synchronization. Compared with conventional schemes, the proposed scheme can achieve a smaller mean square error and provide a wider frequency acquisition range.