Method for L1 assisting L2P (Y) of dual-frequency GPS receiver

The invention provides a method for L1 assisting in L2P (Y) of a dual-frequency GPS receiver. The method includes the following steps: firstly capturing a L1-C/A code, obtaining the Doppler shift an initial code phase of a L1 signal, tracking the L1-C/A code, resolving the navigation message of the...

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Bibliographische Detailangaben
Hauptverfasser:	ZHONG XIAOMIN, WEI JINGFA, KOU JIANHUI, WANG XIAOFENG, WANG BINLONG
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	ANALOGOUS ARRANGEMENTS USING OTHER WAVES DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES MEASURING PHYSICS RADIO DIRECTION-FINDING RADIO NAVIGATION TESTING
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Beschreibung
Zusammenfassung:	The invention provides a method for L1 assisting in L2P (Y) of a dual-frequency GPS receiver. The method includes the following steps: firstly capturing a L1-C/A code, obtaining the Doppler shift an initial code phase of a L1 signal, tracking the L1-C/A code, resolving the navigation message of the L1-C/A code, and acquiring current time from the navigation message; then removing the P code of a Q branch of the L1 signal, obtaining a L1_w signal containing w code; removing a local carrier of a L2P(Y), obtaining the signal containing P code and W code; removing the P code of the L2P(Y) signal, obtaining a signal which only contains the W code; finally removing an encrypted W code of the L2P(Y) code, obtaining the data of the L2P(Y). According to the invention, the method can substantially reduce the complexity of the dual-frequency GPS receiver and reduce operation amount. 本发明提供了种双频GPS接收机L1辅助L2P(Y)跟踪的方法，首先捕获L1-C/A码，得到L1信号的多普勒频移和初始码相位，跟踪L1-C/A码，解算出L1-C/A码的导航电文，并从中获取当前时间；然后去掉L1信号Q支路的P码，得到含W码的信号L1_w；去掉L2P(Y)的本地载波