西安电子科技大学学报（自然科学版）2017，Vol.44Issue(5)：18-24,113,8.DOI:10.3969/j.issn.1001-2400.2017.05.004
利用匹配傅里叶变换的直扩信号捕获算法
Fast DSSS acquisition algorithm based on the match Fourier transform
摘要
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 10 ms.关键词
扩频通信/信号捕获/高动态/匹配傅里叶变换/粒子群优化Key words
spread spectrum communication/signal acquisition/high dynamic/match Fourier transform/particle swarm optimization分类
信息技术与安全科学引用本文复制引用
张轩,李勇朝,叶迎晖,张海林..利用匹配傅里叶变换的直扩信号捕获算法[J].西安电子科技大学学报（自然科学版）,2017,44(5):18-24,113,8.基金项目
高等学校学科创新引智计划("111 计划")资助项目(B08038) （"111 计划"）
先进轨道交通重点专项资助项目(2016YFB1200202) （2016YFB1200202）
