Satellite navigation anti-interference and attitude measurement method based on the array antenna

Abstract

The invention mainly belongs to the technical field of satellite navigation, and particularly relates to a method for realizing satellite navigation anti-interference and attitude measurement based onan array antenna. The attitude measurement method comprises the following steps: a satellite navigation array antenna is arranged to receive a satellite navigation radio frequency signal; each antenna array element in the satellite navigation array antenna corresponds to one radio frequency front end channel, the radio frequency front-end channel processes the radio-frequency signals received bythe antenna array element to generate a digital baseband signal; an anti-interference processing module is used for carrying out self-adaptive array signal processing on the digital baseband signals,and the interference is eliminated to form a beam null notch and interference is eliminated; the carrier phase position of the satellite navigation signal received by each antenna array element is recovered, and the attitude of the array antenna is calculated through an array antenna attitude measurement model. According to the method, the array antenna is used for carrying out anti-interference processing and attitude measurement operation on the received signals, and the satellite navigation attitude measurement function can be realized in an interference environment.

Description

technical field [0001] The invention mainly belongs to the technical field of satellite navigation, and in particular relates to a method for realizing anti-interference and attitude measurement of satellite navigation based on an array antenna. Background technique [0002] The global satellite navigation system (GNSS) mainly includes the GPS system of the United States, the GLONASS system of Russia, the Galileo system of Europe, and the Beidou satellite navigation system (BDS) of China. Among them, my country's Beidou satellite navigation system has completed the construction of Beidou No. 1 and Beidou No. 2 systems, providing satellite navigation services for my country's surrounding areas and the Asia-Pacific region. The Beidou No. 3 system is under construction and is expected to serve global users around 2020. Provide service signal. Since the navigation satellites are very far away from the earth and the satellite transmission power is limited, the navigation signals ...

AI Technical Summary

Problems solved by technology

However, the accuracy of satellite navigation attitude measurement depends on the carrier phase measurement of the navigation signal, and the receiver will not work normally after being interfered, resulting in the failure of the attitude measurement algorithm.

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