SAR image geometry correction technology based on block parallel signal processing

Abstract

Abstract: To solve the complicated calculation problems of SAR (Synthetic Aperture Radar) image geometric correction, limited by low nonlinear reading and writing efficiency of massive data, and inability to meet real-time performance requirements, a SAR geometric correction technology based on block parallel is proposed, and the numerical boundary of nonlinear matrix projection geometric correction is derived firstly, which completes the accurate division of projection grid, and combines the full use of multi-core DSP (C6678) cache, Compared with the geometric correction CPU, the serial processing can achieve an acceleration ratio of 189.32, which is 45.8 times higher than the DSP based multi-point parallel projection, gets excellent acceleration performance.