| 基于FPGA实现的SAR成像中的方位预滤波 |
| |
| 作者姓名： | 王胜华 李凉海 曹运合 |
| |
| 作者单位： | 航天科技集团公司第704研究所 北京100076(王胜华)，航天科技集团公司第704研究所 北京100076西安电子科技大学雷达信号处理国家重点实验室西安710071(李凉海)，西安电子科技大学雷达信号处理国家重点实验室 西安710071(曹运合) |
| |
| 摘 要： | 针对SAR成像中的方位预滤波,讨论两种方位预滤波的算法。经比较,“拉格朗日乘子法”滤波器更适合应用到SAR成像中,因为该方法在保证相位特性的同时使成像带宽内信号能量最大、非成像带宽内的信号能量尽可能小,最大限度地保证了成像质量。最后还给出方位预滤波基于FPGA的硬件实现及实测数据成像结果。
|
| 关 键 词： | SAR 方位预滤波 降采样 拉格朗日乘子法 FPGA |
The Realization of Azimuth Prefilter in SAR Imaging System Based on FPGA |
| |
| Authors: | Wang Shenghua Li Lianghai Cao Yunhe |
| |
| Abstract: | In SAR imaging system two algorithms about azimuth prefilter are discussed in this paper.Through comparison we found that the filter designed by "lagrange" multiplier algrithum is superior to that designed by "window function" algorithm.Because it has linear phase,the largest amount of energy in imaging band with and the smallest amount of energy in unimaging band with.So that it makes the quality of imaging much better.Finally we give the hardware realization of prefilter in SAR imaging system basing on FPGA and the real-time imaging results. |
| |
| Keywords: | SAR Azimuth prefilter Desampling filter Lagrange multiplier algrithum FPGA |
| 本文献已被 CNKI 等数据库收录！ |
