Method for detecting rapid artillery type dim target

Abstract

The invention discloses a method for detecting a rapid artillery type dim target. A radar signal processing system applies the improved dynamic programming detection algorithm to echo waves in all directions in a parallel mode; data in the slow time-distance domain in each direction are converted to a Doppler-distance domain at first; then, a first threshold pre-judging is carried out on the converted Doppler-distance domain data; continuous K-frame Doppler-distance data obtained after being preprocessed are copied according to the speed fuzzy number range, and Doppler dimension coordinate values of the copied data are adjusted; then the dynamic programming algorithm is applied to each fuzzy number datum, and a corresponding value function accumulation value and a target motion state matrix are obtained; a radar detection result is displayed by combining the value function accumulation values of all the fuzzy numbers. By means of the characteristic of the rapid artillery type dim target, the improved dynamic programming algorithm is applied to pulse Doppler radar signal processing, and the radar detection probability is effectively improved.

Description

technical field The invention relates to a method for a radar system to quickly detect weak targets such as artillery under the condition of low signal-to-noise ratio. Background technique At present, modern radar signal processing theory basically follows the stationary signal processing model, and only uses the isolated processing method of a single frequency and a single range unit, and does not involve the influence of non-stationary factors such as target speed changes and distance migration. But for the radar weak and small target moving at high speed, the non-stationary factor of the target must be considered when accumulating. Since the signal-to-noise ratio of the echo signal is very low, if only the echo data of a single frame is used, the detection result cannot be obtained. Therefore, long-term multi-pulse accumulation is required for radar echo signals. Secondly, due to the high moving speed of the target or the high range resolution, the target echo may have ...

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Problems solved by technology

However, the dynamic programming algorithm needs to combine multiple frames of 3D data for processing, and the amount of calculation and storage is very large. It is difficult to achieve the real-time performance of short-range high-speed artillery target detection.

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