利用匹配傅里叶变换的直扩信号捕获算法

doi:10.3969/j.issn.1001-2400.2017.05.004

Abstract

Abstract:

Induced by Chip Effects and Doppler Effects, the accumulating performance of the Direct Sequence Spread Spectrum signal is limited under high dynamic and low signal noise ratio scenarios in near space. To circumvent this problem, a particle swarm fast discrete match Fourier transform based Double Block Zero Padding algorithm is proposed by compensating Chip Effects and Doppler Effects simultaneously. Further, the particle swarm optimization is employed to optimize the iteration of fast discrete match Fourier transforms. Both simulation and theoretical analysis show that the proposed algorithm can not only enhance the acquisition probability and accuracy, but reduce the computational complexity as well. The computation of the proposed algorithm is 46％ that of other existing methods when the coherent time is 10ms.

ZHANG Xuan;LI Yongzhao;YE Yinghui;ZHANG Hailin. Fast DSSS acquisition algorithm based on the match Fourier transform[J].Journal of Xidian University, 2017, 44(5): 18-24+113.

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Fast DSSS acquisition algorithm based on the match Fourier transform

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