| 基于C/A码辅助的GPS M码信号盲解调 |
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| 引用本文： | 李 星,刘 义,董 政,李运宏.基于C/A码辅助的GPS M码信号盲解调[J].电讯技术,2021,61(3):316-320. |
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| 作者姓名： | 李 星 刘 义 董 政 李运宏 |
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| 作者单位： | 洛阳电子装备试验中心,河南洛阳 471003;洛阳电子装备试验中心,河南洛阳 471003;洛阳电子装备试验中心,河南洛阳 471003;洛阳电子装备试验中心,河南洛阳 471003 |
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| 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。
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| 关 键 词： | GPS M码信号 盲解调 BOC调制 相参增强 |
Blind demodulation of GPS M code signal assisted by C/A code |
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| LI Xing,LIU Yi,DONG Zheng,LI Yunhong.Blind demodulation of GPS M code signal assisted by C/A code[J].Telecommunication Engineering,2021,61(3):316-320. |
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| Authors: | LI Xing LIU Yi DONG Zheng LI Yunhong |
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| Affiliation: | (Luoyang Electronic Equipment Test Center of China,Luoyang 471003,China) |
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| 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. |
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| Keywords: | GPS M code signal blind demodulation BOC modulation coherent enhancement |
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