Using COTS Components for Real-Time Processing of SAR Systems
نویسندگان
چکیده
The research activities are divided into three stages, with each stage lasting approximately one month. In the first stage ', we discussed the design trade-off for real-time SAR processing. The objectives are to maximize the processing density (MFLOPS/volume, MFLOPVweight, MFLOPS/watt), to minimize the hardware cost (MFLOPS/dollar), to minimize the software development cost, and to maximize software generality. As an example, we briefly described the Mercury's RACEway multicomputer as a low cost, high-performance, embedded heterogeneous message-passing multicomputer system. In the second stage 2, we presented a procedure to divide the SAR signal processing into pipelined parallel steps that can be performed on a parallel computer. We also estimated the throughput, memory, and 1/0 bandwidth requirements using the NASA/JPL GeoSAR system. Using again the Mercury's RACEway multicomputer as an example, we showed how to configure the hardware for SAR signal processing. Parallel programming was the topic in this final stage '. First, we gave an overview of the standard multicomputing platforms and parallel programming models. We then compared and contrasted "scientific" versus "real-time" processing/programming. Next, we showed the hardwarehofiware co-design approach for SAR signal processing. Then, we discussed the current issues in parallel programming. Finally, we described a typical software architecture for parallel programming of SAR signal processing.
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