中文摘要：

为了对GPS M码扩频信号进行研究,首先对实际采集的25 M带宽的GPS信号采用“类BPSK”解调思想,通过工程方法设计解调方案,实现了载波解调,并分离了C/A码、P码和M码信号;然后,对载波和亚载波进行有效剥离,并利用I/Q通道特性,较好地减少了C/A码和P码对M码信号提取的影响。

英文摘要：

In order to research the spread spectrum signal of GPS M code, ＂comparable BPSK demo- dulation＂ ideas is used to process carrier demodulation in the actual received GPS signal with 25 mHz bandwith, and the demodulation scheme is designed by the method of engineering to separate the C/A code, P code from M code. The carrier and the subcarrier tripping are effectively carried out, and the influence of C/A code and P code on M code signal extraction are reduced by using I/Q channels leature.