一种改进的GPS微弱信号捕获算法

摘要

提出一种基于循环相关与非相干积分相结合的GPS微弱信号捕获检测算法，利用改变傅里叶系数取代传统采用频率滑动捕获方法，减少了计算量，提高了捕获速度，同时通过改进差分相干积分，提高了信噪比，十分有助于对GPS微弱信号的检测。%The paper put forward a kind of improved GPS weak signal capture algorithm which based on com-bination of circular correlation and non-coherent integration. Compared with traditional algorithm,the improved algorithm replaced frequency sliding acquisition with changing Fourier factor,not only reduced calculation a-mount,but improved the acquisition speed. Meanwhile,through improving of the differential coherent integra-tion,raised SNR,is very helpful to weak signal capture detection.