A Rapid Echo Generation Method for The Real Aperture Radar in Scan Mode

Abstract

The echo data of real aperture radar in scanning mode is widely used in earth-observing, forward-looking super-resolution imaging and air-searching. However, the generation of the echo data is time-consuming. In this paper, a rapid generation method of the echo for the real aperture radar in scan mode is proposed. First, by analyzing the independent relationship between beam scanning and radar signal propagation, the radar echo signal is decomposed into two-dimensional convolution relationship along the distance direction and the azimuth direction. Then, according to the low-resolution characteristics of the scanning radar and the distribution of target position, the scene and the echo signal are mapped into a unified coordinate system. Finally, due to the two-dimensional convolution relationship along the distance direction and azimuth direction, the fast Fourier transform is used to realize the rapid generation of real aperture radar echo. Simulations verify the acceleration performance of the proposed method.