Airborne radar space-time adaptive dimensionality reduction processing method

Abstract

The invention discloses an airborne radar space-time adaptive dimensionality reduction processing method, and mainly solves the problems that a traditional space-time adaptive processing method needsmultiple training samples, and the operation complexity is high. The method comprises the following steps: 1) pre-filtering the space-time fast-shot data received by an airborne radar system and the space-time guide vector of the to-be-detected unit by combining Doppler three channels with an adaptive processing method, so as to obtain the space-time fast-shot data after dimensionality reduction and the space-time guide vector of the to-be-detected unit after dimensionality reduction; 2) solving an optimal weight vector of the space-time fast-shot data after dimensionality reduction and the space-time guide vector of the to-be-detected object after dimensionality reduction using an iterative correlation subtraction structure multistage Wiener filter; 3) taking the optimal weight vector asa filtering coefficient, carrying out weighted filtering processing on the space-time fast-shot data after dimensionality reduction to obtain target information data. The method has the advantages that the calculation amount is small, the numerical stability is good, the real-time performance of the radar system can be enhanced, and the method can be applied to detection of airborne radar moving targets.

Description

technical field [0001] The invention belongs to the field of radar technology, and further relates to an airborne radar space-time adaptive dimension reduction processing method, which can be used for the detection of airborne radar moving targets. Background technique [0002] Airborne phased array radar is used for reconnaissance and monitoring of intrusion targets due to its long range, high flexibility and reliability, and the ability to scan / track multiple targets / areas at the same time. It plays an important role in national defense and civil construction. play a pivotal role. Because airborne radar often works in a downward-looking environment, it not only needs to face strong ground-sea clutter, but also the movement of the aircraft will broaden the clutter spectrum. In addition, the emergence of technologies such as stealth aircraft, electromagnetic interference and low-altitude penetration, and the increasingly harsh electromagnetic environment have seriously affe...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to propose a space-time adaptive dimension reduction processing method for airborne radar to solve the problems that the traditional space-time adaptive processing method needs more training samples, high computational complexity and poor real-time performance

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