星载合成孔径雷达并行二维成像处理的实现
THE PARALLEL IMAGE PROCESSING OF THE SPACE-BORNE SAR DATA
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摘要: 星载合成孔径雷达是一个二维成像雷达系统，其记录的雷达原始数据是二维不可分离的。所以，把雷达原始数据处理成聚焦的雷达图像是一个二维的成像处理过程。二维数字信号处理对计算系统的性能要求较高，需要很大的内存空间和很高的计算速度，传统的计算机难以胜任。本文基于大规模并行计算机平台，分析了星载合成孔径雷达的二维成像算法，设计了二维快速傅里叶变换的并行新算法，有效地实现了星载合成孔径雷达原始数据的并行成像处理。Abstract: Principally the raw data of the space-borne synthetic aperture radar is two-dimensional Two-dimensional filters must be used to fulfill the transformation from the raw radar data to the focused image.A large memory space will be needed in the two-dimensional processing,and much computing time will be consumed.As a result,its implementation is very tedious in traditional computers.In this paper,the two-dimensional imaging processing is analyzed in detail based on parallel processing systems and the result shows that the processing time is short.
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