Design of L band space-borne SAR digital receiver using direct RF sampling

doi:10.7523/j.issn.2095-6134.2010.4.008

›› 2010, Vol. 27 ›› Issue (4): 486-491.DOI: 10.7523/j.issn.2095-6134.2010.4.008

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Design of L band space-borne SAR digital receiver using direct RF sampling

HUANG Jie-Wen^1,2, LI Yang^1,2, YU Wei-Dong¹

1. Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China;
2. Graduate University of the Chinese Academy of Sciences, Beijing 100049, China

Received:2010-01-25 Revised:2010-03-09 Online:2010-07-15

Abstract

Abstract:

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

CLC Number:

TN957.5

HUANG Jie-Wen, LI Yang, YU Wei-Dong. Design of L band space-borne SAR digital receiver using direct RF sampling[J]. , 2010, 27(4): 486-491.

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Design of L band space-borne SAR digital receiver using direct RF sampling

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