一种改进的GPS微弱信号捕获方法
An Improved Algorithm for Acquisition of Weak Signal in a Software GPS Receiver
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摘要: 介绍了GPSL1载波中C/A码的捕获算法,以快速傅立叶变换为基础,采用相关积分和非相关积分对较长的信号进行处理,实现对GPS微弱信号的捕获。为验证这一算法,利用一组在室内采集的GPSL1C/A码IF数据,采用一般的信号捕获方法和改进的信号捕获方法分别进行了处理。结果显示,采用改进的方法捕获到了较微弱的GPS信号,提高了接收机的灵敏度。Abstract: A method for capturing GPS L1 C/A code signal is introduced.Based on FFT,the coherent and non-coherent processing with longer data set can be used to capture GPS weak signal.A data set collected indoors is used to verify the algorithm,and the result shows that the improved method can capture the GPS weak signal successfully.
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