Fixed-Point Processing of the SAR Back-Projection Algorithm on FPGA

Time-domain back projection (BP) is a widely known method used in Synthetic Aperture Radar (SAR) image formation. Despite its advantages over other formation algorithms, the BP hindered due to computational complexity and requirement of higher number operations processing power. Recently, Field Programmable Gate Array (FPGA) devices have been for acceleration mainly their parallel capabilities, reconfigurability, scalability, low power requirement. This paper presents new Fixed-point based (FxBP) design FPGA Floating-point (FlBP) compare performance. Both designs are developed with N-Dimensional Range (NDR) structure Single Work Item (SWI) using OpenCL. The performance evaluated metric (FPM). It shown that FxBP-NDR FxBP-SWI generate high quality projected images compared FlBP designs, while saving 16.87% 42.54% on logic resources gaining 17.90% 91.62% NDR SWI, respectively. Obtained results clearly indicate perform significantly better FxBP even hardened FPUs.