High resolution and wide swath airborne synthetic aperture radar (SAR) real-time imaging processing system based on graphics processing unit (GPU)

Abstract

The invention discloses a high resolution and wide swath airborne synthetic aperture radar (SAR) real-time imaging processing system based on a graphics processing unit (GPU). The system enables main servers and auxiliary servers to be arranged on an airplane, data obtained by the main servers in real time are distributed to the main servers and the auxiliary servers, and all servers utilize an optimized Omega-k algorithm to perform real-time imaging processing. The whole processing flow of the high resolution and wide swath airborne SAR real-time imaging processing system based on the GPU improves data processing efficiency and can meet high resolution and wide swath real-time imaging processing requirements at onboard environment.

Description

technical field [0001] The invention relates to a GPU-based high-resolution wide-swap airborne SAR real-time imaging processing system, and relates to the technical field of SAR signal processing. Background technique [0002] GPU is an emerging processing core technology in recent years (see "CUDA for GPU High-Performance Computing", China Water Conservancy and Hydropower Press, first edition, Zhang Shu, Chu Yanli, 2010), GPU-based imaging processing equipment is more advanced than CPU-based The equipment has higher processing efficiency and smaller volume, which is convenient for transportation and deployment. Among the GPU devices, NVIDIA's devices are the most mature. At present, the Tesla type GPU processor is specially designed for high-performance computing, and CUDA can be used for programming. However, there is only a commercial version of this type of GPU processor, which cannot meet the environmental index requirements of on-board equipment. [0003] SAR (Synthe...

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Problems solved by technology

[0004] For SAR imaging processing equipment with a high resolution of 0.3 meters and a wide surveying zone with 65,536 range points, there are currently only ground post-event imaging processing equipment, and there is no precedent for on-board real-time imaging processing equipment, which cannot meet the data requirements in the process of disaster reduction and detection. Real-time requirements, comprehensively considering the application of real-time processing of high-resolution and wide swaths on the aircraft, the ground post-event imaging processing equipment has the following shortcomings:

[0008] In short, the imaging processing flow and imaging processing algorithm of the existing post-event imaging processing equipment on the ground cannot meet the real-time imaging processing requirements of the high-resolution wide swath of the aircraft environment.

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