General tracking channel system for satellite navigation receiver baseband chip and tracking method thereof

Abstract

The invention discloses a general tracking channel system for a satellite navigation receiver baseband chip. The general tracking channel system comprises a carrier NCO module, a phase rotation module, a phase modulation module, a code NCO module, a code shift register module, a secondary code module, a pseudo-random code generation module, a parameter setting module, a counter group module and an integral zero clearing module, the carrier NCO module generates a local reproduction carrier; the phase rotation module generates a zero-frequency signal; the phase modulation module realizes phaseadjustment; the code NCO module generates a pseudo code clock and a code shift control signal; the secondary code module generates a secondary code; the pseudo-random code generation module generatesa pseudo-random code; the code shift register module generates a pseudo code; the counter group module generates a periodic zero clearing signal and a zero clearing control signal; the parameter setting module sets parameters; and the integral zero clearing module generates a final numerical signal. The invention further discloses a tracking method of the general tracking channel system for the satellite navigation receiver baseband chip. The invention is high in reliability and occupies few resources.

Description

technical field [0001] The invention belongs to the communication field, and in particular relates to a satellite navigation receiver baseband chip universal tracking channel system and a tracking method thereof. Background technique [0002] At present, there are four major satellite navigation systems in the world, namely: GPS, BDS (Beidou System), GLONASS and Galileo. Each system has multiple frequency points and multiple signals, and signals of different frequency points in different systems often have different parameters such as modulation methods and signal formats. Table 1 lists the currently publicly available system signals and their main parameters: [0003] Table 1 Satellite navigation system signals and their main parameters [0004] [0005] [0006] The satellite navigation system has experienced decades of development, and its signal parameters have been continuously improved with the development of the satellite navigation system. Therefore, there ar...

AI Technical Summary

Problems solved by technology

The difference between the signal parameters of different frequency points in different systems determines that the tracking channel cannot adopt a simple general structure, and an optimized design must be carried out to solve the contradiction between channel unification and resource occupation

[0007] There are two main types of existing tracking channel technical solutions. The first type is a tracking channel specially designed for each signal, which can only be used to track one signal parameter and cannot track signals with other parameters.

The disadvantage of this solution is that it takes up a lot of resources, and it does not take into account the shareable parts between different signals, which increases unnecessary resource consumption; the second type is to combine and share BPSK signal tracking channels with the same code rate, such as B1_GEO and B2_GEO Except for the code generator, the other modules of the channel can be used in common. This scheme realizes the unification of some channels in a local range, but its disadvantage is that it still does not achieve global optimization, especially for the BOC modulation pilot and data of the new system. Signal, unable to achieve unified channel

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