现代电子技术2016，Vol.39Issue(9)：6-11,6.DOI:10.16652/j.issn.1004-373x.2016.09.002
去斜率信号的极坐标格式成像算法的FPGA实现
Realization of FPGA-based polar format imaging algorithm used for dechirp signal
摘要
Abstract
Since the traditional DSP is unable to meet the real⁃time requirement due to the reasons of performance,power consumption and reliability,a FPGA⁃based polar format algorithm(PFA)for beaming airborne synthetic aperture radar(SAR)was designed and implemented to deal with the dechirp signal for the real⁃time processing demand of SAR. The twice Chirp⁃Scaling operation was used in this design to replace the complicated two⁃dimensional interpolation process to improve the efficiency of the algorithm. The step⁃by⁃step implementation of distance and azimuth directions is usually adopted in radar imaging algorithm. The way of time division multiplexing is adopted in this design to greatly reduce the resource usage of FPGA when a little pro⁃cessing time is increased. The design was verified on KC705 development board made by Xilinx. It approximately takes 8 s to process the SAR image of 8 192×8 192 single precision floating point pixels when the system clock frequency works at 200 MHz.关键词
合成孔径雷达/去斜率信号/极坐标格式算法/现场可编程门阵列Key words
synthetic aperture radar/dechirp signal/polar format algorithm/FPGA分类
信息技术与安全科学引用本文复制引用
丁勇,朱岱寅,段化军,石佳宁..去斜率信号的极坐标格式成像算法的FPGA实现[J].现代电子技术,2016,39(9):6-11,6.基金项目
国家自然科学基金（61301212）；航空科学基金（20132007001，20132052030）；江苏省研究生培养创新工程（SJLX_0131）；中央高校基本科研业务费专项资金资助项目；中国博士后科学基金（2012M511750）；国防基础科研计划（B2520110008）；江苏高校优势学科建设工程资助项目；江苏省产学研联合创新资金前瞻性研究项目 （）
