Calculating the electromagnetic scattering of ocean surface by physical optics and CUDA

Xiang Su; Zhen-sen Wu; Jia-ji Wu

doi:10.1117/12.978984

8 November 2012 Calculating the electromagnetic scattering of ocean surface by physical optics and CUDA

Xiang Su, Zhen-sen Wu, Jia-ji Wu

Proceedings Volume 8539, High-Performance Computing in Remote Sensing II; 85390I (2012) https://doi.org/10.1117/12.978984
Event: SPIE Remote Sensing, 2012, Edinburgh, United Kingdom

Abstract

Research on the electromagnetic scattering of ocean surface is significant in target recognition and signal separation technologies and its application are widely involved in remote sensing, radar imaging and early warning. In this paper the statistical wave model are introduced. It uses physical optics (PO), one of high frequency approximation methods, to calculate the backward scattering coefficients of sea surface composed of a large number of triangle patches. PO based on some reasonable approximation needs less memory and execution time than numerical methods; however it should judge the patches whether they are exposed or not to the incident wave which costs a lot of time. We take advantage of the massively parallel compute capability of NVIDIA Fermi GTX480 with the Compute Unified Device Architecture (CUDA) to judge the patches and compute the scattering field of them. Our parallel design includes the pipelined multiple-stream asynchronous transfer and parallel reduction with shared memory. By using these techniques, we achieved speedup of 26-fold on the NVIDIA GTX 480 GPU.

Citation Download Citation

Xiang Su, Zhen-sen Wu, and Jia-ji Wu "Calculating the electromagnetic scattering of ocean surface by physical optics and CUDA", Proc. SPIE 8539, High-Performance Computing in Remote Sensing II, 85390I (8 November 2012); https://doi.org/10.1117/12.978984

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