| 摘要: |
| 针对GPS M码信号受到C/A码和Y码信号的干扰难以直接进行解调的问题，提出了一种基于C/A码辅助的M码盲解调方法。利用解调后的C/A码信号校正信号频偏，通过I/Q支路分离实现将C/A码信号与Y码、M码信号的剥离，最后利用M码信号的特点进行相参增强进一步提高性能。实采数据的解调实验证明了所提算法的可行性。 |
| 关键词: GPS M码信号 盲解调 BOC调制；相参增强 |
| DOI： |
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| 基金项目: |
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| Blind demodulation of GPS M code signal assisted by C/A code |
| LI Xing,LIU Yi,DONG Zheng,LI Yunhong |
| (Luoyang Electronic Equipment Test Center of China,Luoyang 471003，China) |
| Abstract: |
| It is difficult to demodulate GPS M code signal directly due to the interference of C/A code and Y code signal.To solve this problem,a blind demodulation method of M code based on C/A code is proposed.The demodulated C/A code signal is used to correct the signal frequency offset,and the separation of C/A code signal from Y code and M code signal is realized through I/Q branch separation.Finally,the performance is further improved by using the characteristics of M code signal,and the feasibility of the proposed algorithm is proved by the demodulation experiment of real data. |
| Key words: GPS M code signal blind demodulation BOC modulation coherent enhancement |
