为满足扫描成像合成孔径雷达( SAR)系统小型化和低功耗的迫切需求，给出一种频谱分析( SPECAN)算法的现场可编程逻辑门阵列( FPGA)实现，整个成像流程被划分为多个时分的阶段并分配到可复用的运算单元和控制逻辑中，并且提出一种基于FPGA的优化处理结构，将所有的信号处理功能集成在单片FPGA中。在实验与验证部分，通过FPGA处理结果与MATLAB运算结果的对比，以及实际成像试验结果表明了设计正确性和结构的工程实用性，适用于机场跑道、汽车高速公路的检测和定位。%In order to satisfy the urgent requirements of system miniaturization and low power consumption for scan synthetic aperture radar ( ScanSAR ) , field programmable gate array ( FPGA ) implementation of spectral analysis( SPECAN) algorithm for ScanSAR imaging is given in this paper. The whole imaging pro-cessing flow is divided into several time-division stages and mapped to reusable calculation modules and control logics. An optimized processing structure is proposed to integrate all the signal processing proce-dures into single FPGA. In the verification part,comparison between FPGA-based processing results and MATLAB-based off-line processing and the field experimental results indicates the validity of the design and engineering applicability of the proposed system structure. And it is suitable for detection and positio-ning of runway of airport and motorway.
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