%0 Journal Article
%T Design of block adaptive quantization algorithm after IF sampling of space-borne SAR echoes<br>星载SAR回波中频采样后直接BAQ的设计
%A HUANG Jie-Wen
%A QI Hai-Ming
%A LI Yang
%A YU Wei-Dong
%A <br>黄杰文
%A 祁海明
%A 李杨
%A 禹卫东
%J 中国科学院研究生院学报
%D 2010
%I 
%X 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.
%K space-bome SAR
%K IF sampling
%K block adaptive quantization(BAQ)
%K digital down conversion (DDC)<br>星载合成孔径雷达
%K 中频采样
%K 分块自适应量化
%K 数字下变频
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=B5EDD921F3D863E289B22F36E70174A7007B5F5E43D63598017D41BB67247657&cid=B47B31F6349F979B&jid=67CDFDECD959936E166E0F72DE972847&aid=F6CEC1AB5A8291ACAAA5324670B86333&yid=140ECF96957D60B2&vid=DB817633AA4F79B9&iid=0B39A22176CE99FB&sid=02DC3A182A5530DF&eid=CC0ECB9C52F1B85F&journal_id=1002-1175&journal_name=中国科学院研究生院学报&referenced_num=0&reference_num=15