Warning Radar Anti- Interference Design And Implementation

Warning radar as an important part of the radar information and intelligence network, it plays a huge role in target detection and information provision. However, with the development of military and civilian electronic equipment, radar electromagnetic environment has become increasingly complex. Radar system faces the threat of various types of passive and active interference. Accurate detection of targets is also facing serious challenges. The fundamental way to solve the problem is to improve radar anti-interference capability.This paper introduces the AD sampling and timing of the interface board and general signal processing board, which is formed by DSP and FPGA. And on this basis, this paper describes two anti-interference patterns for active and passive interference. For active interference, the paper describes the anti-interference algorithm on the basis of conventional low pulse repetition frequency ranging mode. For passive interference of ground clutter, this paper presents the middle and high repetition frequency pulsed doppler mode.For active interference, this paper firstly analyzes the types and characteristics of the interference, and described the principles of adaptive sidelobe cancellation and blanking algorithm and its improvement measures. Secondly, this paper introduces the whole software implementation process and task allocation of DSP, and introduced two anti-jamming algorithm processes and process timing. Finally, this paper analyzes the performance of the two anti-interference algorithms on suppressing noise blanket jamming and intensive false target jamming by actual measurement data.For passive jamming, this paper firstly studies the statistical characteristics and spectral characteristics of ground clutter, discusses the principle of clutter suppression by FIR filter bank, and analyzes the phenomenon of distance and speed blur and gives solution. Secondly, this paper introduces the whole software implementation process and task allocation of DSP, and provides a method to FIR filter operation optimization. Finally, this paper analyzes the clutter suppression performance and feasibility of distance fuzzy algorithm.