A fast guidance and tracking method and device for a multi-frequency satellite navigation receiver

Abstract

The invention discloses a fast guidance tracking method and device for a multi-frequency satellite navigation receiver. The device comprises an antenna for receiving RF signals of different frequency points; an L1 frequency point RF channel for performing down-conversion on the RF signals of the L1 frequency point into an IF signal; an L1 frequency point acquisition module for performing down-conversion on the RF signals of an L5 frequency point into an IF signal; an L1 frequency point acquisition module for acquiring an L1 frequency point signal to obtain the code phase and Doppler frequency shift of the L1 frequency point; an L1 tracking module for performing guidance tracking on the L1 frequency point signal; and an L5 tracking module for performing guidance tracking on the L5 frequency point signal. The method and device can be used for online or offline setting a hardware receiver and a software receiver in a variety of environments, do not need to consider strict clock synchronization between multiple frequency points, and have good versatility.

Description

technical field [0001] The invention relates to a multi-frequency high-precision satellite navigation receiver, in particular to a method and device for quickly guiding and tracking a multi-frequency satellite navigation receiver. Background technique [0002] At present, satellite navigation multi-frequency receivers generally separately capture, track and decode messages from multiple frequency points of the same satellite. Since the capture module works serially, multiple frequency point signals of the same satellite need to occupy the capture module in turn for signal capture, resulting in a long processing time, and the capture module needs to be compatible with multiple frequency points, which makes the implementation more complicated. [0003] For the parallel fast multi-frequency receiver, there is a fast guidance and tracking device, which converts the Doppler frequency shift of the captured frequency point to the Doppler frequency shift of other frequency points by...

AI Technical Summary

Problems solved by technology

However, due to the need to ensure the synchronization of the L1 and L5 tracking modules, precise design is required on the circuit timing diagram, and there are certain limitations in the scope of application

And by using the tracking and locking information of the L1 frequency point to guide and track the L5 module, there will be a certain time delay between the L1 and L5 frequency points. This delay will cause great uncertainty for the subsequent multi-satellite multi-frequency point positioning

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