GNSS Carrier Tracking Method and Receiver Based on Doppler Residual Estimation

Abstract

The invention discloses a GNSS carrier tracking method based on Doppler residual error estimation and a receiver. The receiver includes a receiving antenna, a radio frequency front-end module, a baseband signal processing module, a positioning solution module, and a tracking parameter prediction module. The tracking method includes: the radio frequency front-end module receives the GNSS signal transmitted by the receiving antenna and processes the GNSS signal to obtain a digital intermediate frequency signal; the baseband signal processing module captures and tracks the digital intermediate frequency signal to obtain tracking data; The calculation module obtains positioning information according to the tracking data; the tracking parameter prediction module obtains Doppler prediction results; the baseband signal processing module uses Doppler residual estimation to perform carrier signal tracking in the next epoch. The invention can expand the traction range of the carrier tracking error, enhance the adaptability of the loop to dynamic signals, and effectively improve the tracking robustness of GNSS reception in high dynamic scenes.

Description

Technical field[0001]The invention relates to a GNSS carrier tracking method and receiver based on Doppler residual estimation.Background technique[0002]Satellite navigation and positioning technology has basically replaced ground-based radio navigation, traditional geodetic and celestial survey navigation and positioning technology, and has promoted a new development in the field of geodetic survey and navigation and positioning. Today, the GNSS system is not only a national security and economic infrastructure, but also an important symbol that reflects the status of a modern power and the country's comprehensive national strength. Because of its significance in politics, economy, and military affairs, the world's major military powers and economies are racing to develop independent satellite navigation systems.[0003]GNSS (Global Navigation Satellite System) refers to the four major global navigation and positioning systems including GPS in the United States, GLONASS in Russia, Ga...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the shortcomings of poor adaptability to dynamic signals and low anti-interference ability of the receiver tracking algorithm in the prior art, and provide an adaptability cavity to dynamic signals, which can effectively improve GNSS reception at high GNSS Carrier Tracking Method and Receiver Based on Doppler Residual Estimation for Tracking Robustness in Dynamic Scenes

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