基于方位向多通道的星载SAR Mosaic模式研究

发布时间：2018-02-22 02:43

本文关键词： 合成孔径雷达 Mosaic模式方位向多通道脉冲重复频率　出处：《电子与信息学报》2014年12期 　论文类型：期刊论文

【摘要】：Mosaic模式是聚束和Scan SAR的混合模式,能同时实现高分辨率和大场景成像。该文提出一种基于方位向多通道的Mosaic模式,将成像场景沿距离向和方位向划分为若干子成像块,各块采用滑动聚束模式独立成像后再进行2维拼接。利用短发射子孔径使系统扫描角显著减小,进而降低系统设计难度,同时也使各子成像块距离徙动量减小;方位向多通道接收能提高系统信噪比,利用空间采样降低脉冲重复频率,更有利于波位选择。
[Abstract]:Mosaic mode is a hybrid mode of spotlight and Scan SAR, which can realize high resolution and large scene imaging at the same time. In this paper, a Mosaic mode based on azimuth multi-channel is proposed, in which the imaging scene is divided into several sub-imaging blocks along the range and azimuth directions. The scanning angle of the system is significantly reduced by using the short emission sub-aperture, and the system design difficulty is reduced, at the same time, the distance migration momentum of each sub-imaging block is also reduced. The azimuth multichannel receiver can improve the signal-to-noise ratio (SNR) of the system and reduce the pulse repetition frequency by using spatial sampling, which is more favorable to the selection of wave position.
【作者单位】：中国科学院电子学研究所;中国科学院大学;
【分类号】：TN958

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