中文摘要：

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。

英文摘要：

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.