SAR real-time imaging pipeline technology based on multi-core DSP

Abstract

According to the characteristics of SAR imaging, a SAR real-time imaging pipeline technology based on multicore DSP is proposed. The algorithm uses sub-aperture complex image stitching technology for real-time data processing, uses ECS operation to process the range direction of each subaperture data, and uses the Dechirp operation to process the azimuth direction. This technology is based on TI’s multi-core DSP C6678 chip to achieve a pipeline design, and coherently splices the processed sub-aperture image data in the complex image domain to obtain a full-resolution image of the recorded data. The algorithm is optimized for the KeystoneII hardware architecture of the chip to meet the performance requirements of real-time processing of SAR imaging. In this paper, the banding mode of SAR is verified, and the imaging results of the measured data test the effectiveness and real-time performance of the technology.