Multi-beam directional anti-interference processing method for satellite navigation reception system

Abstract

The invention provides a multi-beam directional anti-interference processing method for a satellite navigation reception system. According to the method, at the initial moment, time space anti-interference weight is calculated according to a minimum power algorithm, an output signal is captured and tracked after weight of the time space anti-interference weight, a captured and tracked local signal is taken as an expectation signal to carry out minimum mean squared error calculation to acquire time space wave beam direction weight capable of forming wave beams in a satellite signal direction, after weight processing on the time space wave beam direction weight, the signal is utilized to inhibit compaction interference, moreover, satellite signals are improved, influence of multipath interference can be effectively inhibited, and anti-interference capability of the satellite navigation system is greatly improved. According to the method, wave beam direction for the captured and tracked signal is not only realized, observation on non-captured satellites can be carried out in real time, when situations of satellites change, wave beam direction is updated in real time, the algorithm principle is simple, and the interference inhibition effect is good.

Description

technical field [0001] The invention belongs to the field of array signal processing, in particular to a multi-beam pointing anti-jamming processing method for a satellite navigation receiving system. Background technique [0002] In the satellite navigation receiving system, since the power of the satellite navigation signal reaching the ground is very weak, about -160dBW, which is usually 20dB lower than the thermal noise power of the receiver, the signal-to-noise ratio entering the receiver is very low, which directly leads to satellite navigation The susceptibility of the system to interference. [0003] Interference includes man-made interference such as deceptive interference and suppression interference, as well as various multipath interference caused by the external environment. Traditional interference suppression methods mostly use space-time power inversion algorithms, use antenna arrays to receive satellite navigation signals, and increase the degree of freedom...

AI Technical Summary

Problems solved by technology

Traditional interference suppression methods mostly use space-time power inversion algorithms, use antenna arrays to receive satellite navigation signals, and increase the degree of freedom in the time domain during processing, but due to the limitation of algorithm principles, neither the array gain for useful signals is formed, Without suppressing the multipath effect of the signal

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