Corner turn of SAR data based on multi-FPGAs parallel system

Authors:
Huanghui Shen;Zhensong Wang;Weimin Zheng
Affiliations:
Institute of Computing Technology of Chinese Academy of Sciences, Beijing 100190, China and Graduate University of the Chinese Academy of Sciences, Beijing 100049, China;Institute of Computing Technology of Chinese Academy of Sciences, Beijing 100190, China;Shenzhen Institute of Advanced Technology, Shenzhen 518055, China
Venue:
Computers and Electrical Engineering
Year:
2012

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An Efficient Technique for Corner-Turn in SAR Image Reconstruction by Improving Cache Access

IPDPS '02 Proceedings of the 16th International Parallel and Distributed Processing Symposium

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Abstract

A segmented storage strategy is provided for corner turn of Synthetic Aperture Radar (SAR) data based on multiple Field-Programable Gate Arrays (multi-FPGAs) parallel system. The optimal segmented length is related to the type of the Double-Data-Rate (DDR) memory. Address mapping between pixel location and memory location is expressed in pseudo-code, and the address mapping between bus address and memory address is also deduced in universal expression. A hardware module is given to implement DDR2 SDRAM controller. Practical debugging and experiment have proved that the segmented storage method balances the access rate between row and column in memory cells and accelerates the corner turn of two dimensional image data. Compared with previous related works, our implementation could get higher Throughput/Area and provide much more optimal performance.