An SAR pre-filtering method was proposed in some paper to meet engineering requirement of some pro-jects.The data streaming of PRT-grade in FPGA was realized via outside QDRII SDRAM caches;fdc compensation and SAR pre-filtering calculation were accomplished by using the powerful parallel processing capabilities of FPGA;all parameters with pre-filtering correlation were setting by DSP.Thanks to the above-mentioned methods,the cal-culating time was reduced,debugging efficiency was improved,and the SAR radar signal process in one 3U board was accomplished.
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