Adaptive anti-interference system and method

Abstract

The invention relates to an adaptive anti-interference system and an adaptive anti-interference method. The adaptive anti-interference system comprises a signal acquisition device, an A / D (analog-to-digital) conversion device, a digital automatic gain control module, a multi-channel signal reproducer, a time-domain filtering processing module and a transform-domain filter generation module, wherein the digital automatic gain control module is respectively connected with the time-domain filtering processing module and the transform-domain filter generation module by the multi-channel signal reproducer; the digital automatic gain control module is used for adjusting the amplitude of a digital signal; the multi-channel signal reproducer is used for reproducing the digital signal outputted by the digital automatic gain control module into at least two channels of digital signals, transmitting one channel of digital signal to the time-domain filtering processing module, and transmitting the other digital signals to the transform-domain filter generation module; the transform-domain filter generation module is used for generating filtering processing coefficients according to interference in the digital signals which are detected in real time, and transmitting the filtering processing coefficients to the time-domain filtering processing module; and the time-domain filtering processing module is used for carrying out real-time filtering on the interference in the digital signals according to the filtering processing coefficients.

Description

technical field [0001] The invention relates to the field of anti-jamming of wireless communication technology, in particular to an adaptive anti-jamming system and method in the field of wireless communication technology. Background technique [0002] With the increasingly complex electromagnetic environment and the continuous upgrading of electronic countermeasures, the anti-jamming capability of communication systems is becoming more and more important. Therefore, it is very important to take special anti-jamming measures to filter out the malicious jamming by the enemy in electronic countermeasures. [0003] Spread spectrum communication is a communication technology commonly used in wireless communication systems with anti-interference ability. In spread spectrum communication, the system itself has strong anti-interference ability, but its anti-interference ability is proportional to the spread spectrum gain. When the spread spectrum gain is limited or the system band...

AI Technical Summary

Problems solved by technology

The adaptive filtering technology in the time domain has good narrow-band interference suppression ability, but it has high requirements on the stability of the filtering algorithm, and the convergence speed is slow, and the real-time performance is poor; although the adaptive filtering technology in the frequency domain is relatively slow in real-time The domain adaptive filtering method has been greatly improved, but the ability to filter out the interference is limited, and it is difficult to completely remove the interference

Images