NONLINEAR CS ALGORITHMS FOR FORWARD-SQUINT SAR IMAGING
非线性CS算法的前斜视SAR成像

Based on the forward-squint-looking SAR mode of SAR system, this paper gives the mathematical model of SAR echo signal, and carefully analyses the instantaneous azimuth frequency , the instantaneous Doppler frequency component of the azimuth frequency and the impact of range chirp on azimuth frequency, then combining with the common chirp scaling algorithms, proposes an improved chirp scaling algorithm for forward-squint-looking SAR imaging, and takes the simulated test with the algorithm. The results of theory and simulation show that the way is more reasonable for forward-squint-looking SAR geometric relation and can effectively complete range cell migration correction, range compression and azimuth focusing, and improve images' quality.