Processing method of satellite signal tracking loop assisted by inertial information

Abstract

The invention belongs to the field of satellite receiver baseband signal processing, and relates to a processing method of a satellite receiver tracking loop assisted by inertial information. According to the invention, accelerated speed information output by inertial navigation is used to assist the satellite receiver tracking loop to reduce the dynamic stress error of a carrier tracking loop; the equivalent noise bandwidth of the tracking loop can be reduced; long-time coherent integration is realized; the thermal noise error of the loop can be reduced; the tracking performance of the loop for a low carrier-to-noise ratio signal is improved; the realization form of the satellite signal tracking loop under the assistance of inertia information is disclosed; the calculation of the loop assistance quantity of the inertia information, the loop filter order, the loop filter bandwidth, the loop filter realization structure and the loop filter switching application form are mainly comprised; the tracking dynamic performance of a satellite receiver is improved; and the sensitivity of the receiver is improved.

Description

technical field [0001] The invention belongs to the field of baseband signal processing of satellite receivers, and relates to a tracking loop processing method for assisting satellite receivers by using inertial information. Background technique [0002] Inertial navigation system has become an indispensable and important part in the fields of aviation, spaceflight, navigation, land navigation and geodesy due to its outstanding advantages such as autonomy, strong concealment, all-weather, anti-interference, large output information, and strong real-time output information. , but its high precision will decrease with time. [0003] Satellite navigation system (GPS, GLONASS, Beidou, etc.) is a high-precision navigation and positioning system that can provide users with information such as longitude, latitude, altitude, speed, and time, and has been widely used in military and civilian fields. However, due to the limitations of the signal's susceptibility to interference and ...

AI Technical Summary

Problems solved by technology

However, due to the limitations of the signal's susceptibility to interference and the high dynamics of the carrier, the user equipment cannot normally obtain satellite signals, and thus cannot generate positioning information, which largely limits the application of satellite navigation systems.

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