Range Cell Migration Correction using texture mapping on GPU

Abstract

Range Cell Migration Correction (RCMC) is a key step in the imaging procedure of Synthetic Aperture Radar (SAR). The performance of RCMC affects the final SAR image quality greatly. Traditionally, RCMC is carried out via an interpolation operation on CPU, and is a time-consuming phase in the whole processing flow. In this paper, a novel RCMC technique using texture mapping is proposed. The texture mapping operation is implemented on the Graphics Processing Unit (GPU), which accelerates the operation by special hardware structure. The proposed RCMC technique can achieve a higher speed compared with the traditional methods designed for CPU.

An Imaging Algorithm for Spaceborne High-Squint L-Band SAR Based on Time-Domain Rotation

“…YNTHETIC aperture radar (SAR) provides high azimuth resolution by exploiting the relative motion between the moving radar and its targets [1]. Due to range variations between the SAR and its target, the return echo from the target usually crosses over several range bins, an effect called range cell migration (RCM) [2], [3]. To accomplish azimuth focusing, RCM must be corrected to concentrate the echo energy into a single range bin.…”