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Proceedings Paper

Application of compressive sensing to radar altimeter design
Author(s): Yunhua Zhang; Xiao Dong; Wenshuai Zhai
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Paper Abstract

We propose to apply the compressive sensing technique to the design of satellite radar altimeter for increasing the sampling time window (STW) while keeping the same data rate so as to enhance the tracking robustness of an altimeter. A satellite radar altimeter can measure the range between the satellite platform where it is aboard and the averaged sea surface with centimeter level accuracy. The rising slope of the received waveform by altimeter contains important information about the sea surface, e.g. the larger the slope of the waveform, means the smoother the sea surface. Besides, the half-power point of the slope refers to the range information. For satellite altimeter, due to the rising slope just occupies fewer range bins compared with the whole range bins illuminated by the long pulse signal, i.e. the signal is sparse in this sense, thus compressive sensing technique is applicable. Altimeter echoes are simulated and the waveforms are constructed by using the traditional method as well as by compressive sensing (CS) method, they are very well agreed with each other. The advantage of using CS is that we can increase the sampling time window without increasing the data, thus the tracking capability can be enhanced without sacrificing the resolution.

Paper Details

Date Published: 14 October 2015
PDF: 10 pages
Proc. SPIE 9638, Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions 2015, 963809 (14 October 2015); doi: 10.1117/12.2194559
Show Author Affiliations
Yunhua Zhang, Key Lab. of Microwave Remote Sensing (China)
Ctr. for Space Science and Applied Research (China)
Xiao Dong, Key Lab. of Microwave Remote Sensing (China)
Ctr. for Space Science and Applied Research (China)
Wenshuai Zhai, Key Lab. of Microwave Remote Sensing (China)
Ctr. for Space Science and Applied Research (China)


Published in SPIE Proceedings Vol. 9638:
Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions 2015
Charles R. Bostater; Stelios P. Mertikas; Xavier Neyt, Editor(s)

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