摘要
多通道合成孔径雷达可以突破传统SAR不能同时实现高分辨宽测绘带的限制,是SAR发展的必然趋势,在成像处理时,它必须重建方位均匀采样数据。该文提出了一种基于降升调频斜率技术的处理方法,利用线性调频信号特性对方位非均匀数据进行解线性调频处理,然后采用升采样参考函数进行逆解线性调频处理,即完成方位数据的均匀重建。文中给出了信号处理流程,并与重建滤波器组法进行了比较。仿真结果证明了理论分析的正确性。
Multi-channel SAR can achieve high resolution and wide swath at the same time,which overcoming the inherent limitations of conventional SAR system.Azimuth uniformly sampled data must be reconstructed in imaging procession.A novel method based on fall-rise chirp rate technology is proposed.The original signal is dechirped firstly;then,it is up sampled,and reconstructed by inverse processing of dechirping.Data processing flow is given,and the reconstruction effect of this new method and classical ways using reconstruction filter banks are compared.All simulation results prove the correctness of theoretic analysis.
出处
《电子与信息学报》
EI
CSCD
北大核心
2012年第3期628-632,共5页
Journal of Electronics & Information Technology
关键词
多通道合成孔径雷达
非均匀间隔
重建滤波器组法
降升调频斜率法
Multi-channel SAR（MSAR）
Nonuniform sampling
Reconstruction filter banks method
Fall-Rise Chirp Rate（FRCR） method
