Improved timing synchronization algorithm for OFDM system based on ZC sequence

Xiuyan Zhang; Guobin Tao

doi:10.1117/12.2682290

26 May 2023 Improved timing synchronization algorithm for OFDM system based on ZC sequence

Xiuyan Zhang, Guobin Tao

Proceedings Volume 12700, International Conference on Electronic Information Engineering and Data Processing (EIEDP 2023); 127001V (2023) https://doi.org/10.1117/12.2682290
Event: International Conference on Electronic Information Engineering and Data Processing (EIEDP 2023), 2023, Nanchang, China

Abstract

An improved timing synchronization algorithm based on ZC (Zadoff-Chu) sequence is proposed in order to improve timing synchronization accuracy of OFDM (Orthogonal Frequency Division Multiplexing) system. This algorithm combined the sequence inversion of Minn algorithm with the sequence conjugate of Park algorithm. The new sequences replaced PN sequences with ZC sequences that have good autocorrelation and low cross-correlation. Even in the timing position error, the system can still be precisely timing synchronized. Under the channel of AWGN (Additive Gaussian White Noise), the number of subcarriers is 25616QAM modulation and demodulation. Matlab simulation shows that the improved algorithm eliminates the influence of minor peak on timing synchronization in Minn algorithm and Park algorithm Timing deviation and MSE (Mean Square Error) are lower than Minn algorithm and Park algorithm within -15 to approximately15-dB, which improves timing accuracy. When the SNR is 15-dB, the timing MSE of the improved algorithm is 4.2×10^-6, which is the optimal state for estimating performance.

Citation Download Citation

Xiuyan Zhang and Guobin Tao "Improved timing synchronization algorithm for OFDM system based on ZC sequence", Proc. SPIE 12700, International Conference on Electronic Information Engineering and Data Processing (EIEDP 2023), 127001V (26 May 2023); https://doi.org/10.1117/12.2682290

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