A method for multi-channel forward-looking imaging of a constant-velocity airborne array radar

Abstract

A kind of multichannel forward-looking imaging method of uniform motion airborne array radar, the present application relates to the forward-looking imaging method of array radar in the case of uniform motion airborne.This application aims to solve the problem that the existing forward-looking imaging method has low azimuth resolution of forward-looking imaging, and monopulse forward-looking imaging cannot measure the angle of multiple targets.The process is as follows: step one, using uniform motion airborne array radar to perform pulse compression and motion compensation on the echo signal of the stationary target on the ground in the forward-looking area;Step two, estimate the number of signal sources using the Guss circle method, preset the range of elevation angle and azimuth angle to be measured, construct the measurement matrix, and calculate the two-dimensional spectrum curve of the elevation angle-azimuth angle dimension using two-dimensional multiple signal classification algorithm;Step three, accumulate the amplitude of the two-dimensional spectrum curve corresponding to X-Y coordinates, and the target image can be obtained.The present application belongs to the field of radar technology.

Images