Establishment and analysis of accurate signal model for forward-looking imaging radar with motion platform

In this paper, the effect of platform movement on the echo signal of forward-looking imaging radar is studied through establishing accurate echo signal model. Based on the geometric relationships between platform movement and beam scanning, the mathematical expressions of instantaneous scanning velocity, the illumination starting time and lasting time are derived. Through analyzing the accurate echo signal model, it is found that platform movement causes imaging target´s deviation from the actual location and pattern distortion. At last, simulations demonstrating this effect are carried out. This paper provides theoretic basis for forward-looking radar imaging data processing.