Satellite navigation intermediate-frequency signal carrier tracking device and method

Abstract

The invention relates to a satellite navigation intermediate-frequency signal carrier tracking device and method. The device comprises a carrier numerical control oscillator module, a demodulation module, an integral cleaning module, a carrier phase discriminator module, a wavelet denoising module, a signal dynamic monitoring module, a loop bandwidth setting module, a loop filter module and a loop judgment module. The method comprises the following steps that: (1) initial local carrier replica signals are acquired; (2) received pseudo-code stripped intermediate frequency signals are demodulated; (3) integral cleaning is performed; (4) phase discrimination difference signals are solved; (5) wavelet denoising is performed on the phase discrimination difference signals; (6) dynamic characteristic estimation is performed; (7) optimal bandwidth is solved; (8) the de-noised phase discrimination difference signals are filtered; (9) local carrier replica signals are re-generated; and (10) whether tracking is completed is judged. The satellite navigation intermediate-frequency signal carrier tracking device and method of the invention are suitable for signal tracking under high dynamic environment, can tolerate a wide dynamic range and have precise carrier tracking performance.

Description

technical field [0001] The invention belongs to the technical field of communication, and further relates to a satellite navigation signal carrier tracking device and method in the technical fields of phase-locked loop PLL and navigation baseband signal processing. The invention can be used for tracking the carrier frequency and phase of the satellite navigation intermediate frequency signal. Background technique [0002] Carrier tracking of satellite navigation signals is a technology in the field of navigation baseband signal processing. At present, there are mature technologies for carrier tracking of intermediate frequency signals of satellite navigation signals. However, there are still many deficiencies in carrier tracking in weak signal and high dynamic environments. [0003] Sichuan Jiuzhou Electric Group Co., Ltd. applied for a patent document "A method for adaptive tracking of receivers in high dynamic environments" (application number: 201410433179.X, applicatio...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to overcome above-mentioned deficiencies in prior art, provide a kind of satellite navigation signal carrier tracking device and method, to solve in the prior art that satellite navigation signal is carried out carrier tracking, how to better according to the dynamics of satellite signal The characteristic adjusts the noise bandwidth of the carrier loop, and when the dynamic stress is large, the carrier tracking of the intermediate frequency signal cannot be carried out accurately, the carrier tracking result has jitter, and the noise bandwidth setting is contradictory.

Images