摘要
将谱分析的非线性方法—最大熵谱估计方法用于目标的合成孔径雷达数据处理,导出了分辩率表达式,探讨了最小采样点数及滤波器最佳阶数。对典型的四点目标进行了计算机模拟,所得到的雷达截面二维图象正确地反映了目标散射强度的分布,其分辩率达到纵向5cm,横向7.5cm。与一般的快速 Fourier 方法相比,显著地减少了采样点数,提高了成像的分辩率。
This paper is about digital signal processing of synthetic aperture radar(SAR) imaging.A new method,maximum entropy spectrum estimate(MESE)method,is proposed to perform the SAR data processing for a higher resolution.The result shows that MESE method is effective.It gives a higher resolution of SAR imaging.Range resolution reaches 5 cm and cross—range resolution 7.5 cm.Computer simulations by both methods are presented with simulated data.MESE method has a higher resolution than fast Fourier transform algorithm.
出处
《电波科学学报》
EI
CSCD
1993年第4期15-21,共7页
Chinese Journal of Radio Science
基金
国家自然科学基金
关键词
雷达散射截面
成像
MESE法
RCS imaging
Synthetic aperture radar method
Resolution
MESE method
