Space-time adaptive processing method for airborne forward-looking array radar

Abstract

The invention belongs to the technical field of radar moving target detection, and particularly relates to a space-time adaptive processing method for airborne forward-looking array radar. The method includes the specific steps of obtaining a data vector xnk1, received by the kth pulse of the nth line of array elements of a receiving array of the airborne forward-looking array radar, of a first distance door, obtaining the data vectors, recorded by the nth line of array elements of the receiving array of the airborne forward-looking array radar, of selected distance doors recorded within the time period of [KT, (K+1)T], obtaining the estimation (please see the specifications) of the dimensionality reduction pitching covariance matrix of the first distance door of the nth line of array elements of the receiving array of the airborne forward-looking array radar, obtaining the dimensionality reduction self-adaption weight vector omega E of the first distance door of the nth line of array elements of the receiving array of the airborne forward-looking array radar, obtaining the data vector ynk1, received by the kth pulse of the nth line of array elements of the receiving array of the airborne forward-looking array radar, of the first distance door after pitching pre-filtering is conducted, and obtaining the signal of the kth Doppler channel of the first distance door of the airborne forward-looking array radar through the orientation-Doppler space-time adaptive processing method after the space-time adaptive processing is conducted.

Description

technical field [0001] The invention belongs to the technical field of radar moving target detection, and in particular relates to a space-time adaptive processing method of an airborne forward-looking array radar, which can be specifically applied to a method for detecting a close-range ground moving target of an airborne forward-looking array radar, and is suitable for airborne phase control Array radar for clutter suppression and moving target detection. Background technique [0002] The Ground Moving Target Indication (GMTI) function of the airborne forward-looking array radar has a wide range of military application prospects. For example, in the airborne fire control radar, it is used to detect and guide airborne weapons to attack enemy tanks, armored vehicles or mobile missile launchers. Defects in detection and tracking performance (remote surveillance systems are susceptible to occlusion by tall buildings when detecting ground moving targets in cities). The main p...

AI Technical Summary

Problems solved by technology

The training samples of these two methods are polluted by the pitch main lobe clutter signal, which easily leads to beam pattern distortion and target cancellation

Although the ERCB algorithm adopts the diagonal loading technique to keep the main beam shape, a large loading factor will lead to a large loss of clutter suppression performance

Three-dimensional STAP has the ability to suppress range ambiguity clutter, but it is difficult to obtain enough independent and identically distributed training samples in the clutter environment with serious range non-stationarity

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