Homing signal space-time anti-interference digital signal processor

Abstract

The invention discloses a homing signal space-time anti-interference digital signal processor which mainly solves the problem that the properties of original homing signals cannot be better reserved during interference resistance of the prior art. A processing process of the digital signal processor comprises the following steps of: (1) receiving homing signals by a receiving antenna with a rectangular structure; (2) sampling the homing signals by a digital collecting unit and sending digital samples to a digital orthogonal interpolation module to carry out orthogonal interpolation conversion; (3) converting space domain data into space-time data and dividing the space-time data into two paths, wherein one path is sent into a self-adaptive weight number calculation module, while the other path is sent into a self-adaptive anti-interference module; (4) in the self-adaptive weight number calculation module, calculating a self-adaptive weight number according to a linearly constrained minimum variance; and (5) transmitting the weight number into the self-adaptive anti-interference module to multiply by the other space-time data to finish homing signal interference suppression. The digital signal processor has small signal distortion and high decoding rate and can be applied to anti-interference processing of received homing signals.

Description

technical field [0001] The invention relates to the technical field of signal processing, in particular to an anti-jamming digital signal processor which can be used for anti-jamming processing of navigation received signals. Background technique [0002] Satellite navigation and positioning systems can provide information such as position, speed, and time all-weather and all-day, and generally include satellite constellations, ground control / monitoring networks, and user receiving equipment. The establishment and successful application of GPS (GLOBAL Position System) in the United States has brought huge military and economic benefits to the United States, and has attracted widespread attention from all over the world. Some countries have successively built their own satellite navigation systems, such as Russia's Global Navigation Satellite System (GLONASS) system, the European Union's Galileo (GALILEO) system, China's Beidou navigation system and Japan's QZSS plan. Satell...

AI Technical Summary

Problems solved by technology

[0007] 1) If the antenna array is not properly selected, the signal power cannot obtain a large gain while suppressing interference;

[0008] 2) If the constraint space-time vector is improperly selected, the waveform will be distorted, resulting in a higher bit error rate for despreading and decoding;

[0009] 3) If the degree of freedom in the time domain and the delay time of the delay section are not selected properly, the anti-interference output performance will be poor, and the hardware implementation will be more complicated

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