A space-time adaptive anti-jamming method based on navigation receiver

Abstract

The invention discloses a navigation receiver-based space-time adaptive anti-interference method. The method comprises the steps of 1) receiving a radio frequency (RF) analog signal by an antenna array, and conducting the analog down-conversion and the digital sampling to obtain a digital intermediate-frequency (IF) signal; 2) converting the sampled signal into a digital baseband signal through the digital quadrature down-conversion process; 3) dividing a baseband signal into two paths: wherein one path of data is transmitted to a digital signal processing chip (DSP) and the optimal weight value of the adaptive algorithm is calculated; 4) powering on and initializing the DSP, and calculating the adaptive weight value of a CPU 0 and the adaptive weight value of a CPU 1 based on the adaptive algorithm; 5) conducting the adaptive filtering on one path of the baseband signal in conjunction with the space-time of the weight value; 6) filtering the interfered signal frequency up-conversion, conducting the analog-to-digital conversion, and outputting a navigation signal. According to the technical scheme of the invention, the high-performance space-time adaptive anti-interference is realized at the cost of a small calculation amount. Therefore, the method can be used for positioning a navigation receiver.

Description

technical field [0001] The invention belongs to satellite navigation communication, in particular to a space-time self-adaptive anti-interference method based on a navigation receiver, which can be used for anti-interference in satellite navigation communication. Background technique [0002] GNSS (Global Navigation Satellite System) is a satellite navigation and positioning system that has been continuously developed with modern technology. The receiver on the ground receives the signal from the satellite and performs calculations to realize functions such as positioning and timing. GNSS has played a huge role in fields such as military affairs, agriculture, surveying and mapping, and meteorology. At present, all countries in the world regard it as a key development area, which will have a major impact on the national economy and people's livelihood. [0003] With the increasing complexity of the space spectrum, the anti-jamming research of navigation receivers has gradua...

AI Technical Summary

Problems solved by technology

However, due to the complex use environment of the navigation receiver, such as the position of the receiver changes when encountering bumps or deflections during the driving process of the car, high real-time performance is required, or the distance from the interference source is relatively short, requiring high anti-interference performance, the current anti-interference equipment still cannot meet the requirements

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