收稿日期: 2009-10-26
修回日期: 2009-11-25
网络出版日期: 2010-03-15
Design of block adaptive quantization algorithm after IF sampling of space-borne SAR echoes
Received date: 2009-10-26
Revised date: 2009-11-25
Online published: 2010-03-15
黄杰文 , 祁海明 , 李杨 , 禹卫东 . 星载SAR回波中频采样后直接BAQ的设计[J]. 中国科学院大学学报, 2010 , 27(2) : 204 -211 . DOI: 10.7523/j.issn.2095-6134.2010.2.009
This paper presents a design of block adaptive quantization (BAQ) algorithm immediately after echoes inter-frequency (IF) sampling for space-borne SAR system. Theoretical derivation is given in detail. Compared to the typical structure which implements BAQ after digital down conversion (DDC) in orbit, electrical system design is simplified and less hardware resource is needed when performing DDC on ground. Experimental results show that the two methods achieve similar performance with the same data rate when using mixer-free structure, and the resource for the new design is less than 1/3 of the resource for the typical structure.
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