Airborne radar space-time adaptive processing method based on efa and mwf

Abstract

The invention discloses a method for space-time adaptive processing of airborne radar based on EFA (Extended Factored Approach) and MWF (Multistage Wiener Filter). The train of thoughts is that the method comprises the following steps: performing spatial domain dimension reduction processing on echoes received by the airborne radar in a coherent processing interval; acquiring included N sub arrays of the airborne radar in a coherent processing interval after spatial domain dimension reduction; recording the echo received by the nth sub array of the airborne radar in a coherent processing interval after spatial domain dimension reduction as Xn; then calculating an echo space-time vector Yk of the kth Doppler channel in the N sub arrays of the airborne radar after weighted fast Fourier transform processing; then performing multistage wiener filtering processing on the echo space-time vector Yk to obtain an echo adaptive weight vector W[Yk] of the kth Doppler channel in the N sub arrays of the airborne radar after D-stage wiener filtering processing; and finally, performing wiener filtering on the echo space-time vector Yk by using the echo adaptive weight vector W[Yk] to obtain an echo adaptive weight vector Zk of the kth Doppler channel in the N sub arrays of the airborne radar after two-stage dimension reduction space-time adaptive processing based on the EFA and the MWF.

Description

technical field [0001] The invention belongs to the technical field of radar, in particular to an airborne radar space-time adaptive processing method based on EFA and MWF, that is, based on extended factored approach (Extended Factored Approach, EFA) and multistage Wiener filter (Multistage Wiener Filter , MWF) airborne radar space-time adaptive processing method, which is suitable for adaptive processing of airborne radar signals. Background technique [0002] Airborne radar also receives a large number of clutter signals while receiving the echoes of moving targets. The strength of these clutter signals is often much greater than the target signal to be detected, so that the signal of the moving target to be detected is submerged in the clutter, which affects the The target detection performance of airborne radar; in order to improve the target detection performance of airborne radar, it is necessary to suppress the clutter of the moving target echo received by the airbor...

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