收稿日期: 2010-01-25
修回日期: 2010-03-09
网络出版日期: 2010-07-15
Design of L band space-borne SAR digital receiver using direct RF sampling
Received date: 2010-01-25
Revised date: 2010-03-09
Online published: 2010-07-15
黄杰文 , 李杨 , 禹卫东 . 直接射频采样的L波段星载SAR数字接收机设计[J]. 中国科学院大学学报, 2010 , 27(4) : 486 -491 . DOI: 10.7523/j.issn.2095-6134.2010.4.008
This paper presents a design of L band space-borne SAR digital receiver using direct RF sampling. Appropriate RF sampling frequency is selected and digital quadrature demodulation structure is improved. In order to reduce the volume of data that is stored onboard and later transmitted to ground station, a block adaptive quantization (BAQ) module with flexible compression ratio is developed. Simple electrical system design and advanced SAR system are achieved by using direct RF sampling. Feasibility and performance are verified by experimental results.
Key words： space-borne SAR; L band; RF sampling; digital receiver
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