Journal
ADVANCES IN SPACE RESEARCH
Volume 49, Issue 7, Pages 1180-1190Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.asr.2012.01.009
Keywords
GNSS-Reflectometry; Software-defined radio; Graphics processing units
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Funding
- NICT
- Grants-in-Aid for Scientific Research [21241043] Funding Source: KAKEN
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Reflected signals of the Global Navigation Satellite System (GNSS) from the sea or land surface can be utilized to deduce and monitor physical and geophysical parameters of the reflecting area. Unlike most other remote sensing techniques, GNSS-Reflectometry (GNSS-R) operates as a passive radar that takes advantage from the increasing number of navigation satellites that broadcast their L-band signals. Thereby, most of the GNSS-R receiver architectures are based on dedicated hardware solutions. Software-defined radio (SDR) technology has advanced in the recent years and enabled signal processing in real-time, which makes it an ideal candidate for the realization of a flexible GNSS-R system. Additionally, modern commodity graphic cards, which offer massive parallel computing performances, allow to handle the whole signal processing chain without interfering with the PC's CPU. Thus, this paper describes a GNSS-R system which has been developed on the principles of software-defined radio supported by General Purpose Graphics Processing Units (GPGPUs), and presents results from initial field tests which confirm the anticipated capability of the system. (C) 2012 COSPAR. Published by Elsevier Ltd. All rights reserved.
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