Abstract:

Due to the low efficiency of synthetic aperture radar (SAR) raw data generation in distributed scene, a high-efficient SAR echo simulation method based on the modified concentric circles algorithm and the graphics processing unit (GPU) is proposed. Firstly, an improved concentric circles algorithm is proposed to avoid cases of low signal to noise ratio (SNR) when the traditional algorithm whose precision is low is used. Secondly, the parallel processing of GPU is deeply optimized in order to lift the efficiency of the simulation and make full use of the parallel advantages in GPU kernel. Then, the proposed method adopts “thread extrapolation” to accumulate partial data and realize the whole data generation via “reduction adding”. Finally, simulation results validate the high precision and eficiency of the proposed approach.