Joint effects of on-board Doppler filtering and quantization in spaceborne SAR systems
Villano M, Martone M, Del Zoppo V, Krieger G (2014)
Publication Type: Conference contribution
Publication year: 2014
Conference Proceedings Title: IEEE GOLD Remote Sensing Conference 2014
URI: https://elib.dlr.de/89428/
Abstract
A novel strategy for data volume reduction in spaceborne synthetic aperture radar (SAR) system has been recently proposed, which consists of low-pass filtering and decimating the data prior to downlink and compensating for the filter′s transfer function in the processing. However, if data are further quantized prior to downlink, an amplification of the quantization noise may occur, when compensating for the transfer function of the filter. In a context of data volume reduction, data are likely to be quantized. This paper analyzes the joint effects of on-board Doppler filtering and block-adaptive quantization (BAQ) in spaceborne synthetic aperture radar (SAR) systems. For the present analysis, SAR raw data acquired by the German satellite TerraSAR-X are used. As is apparent, the removal of the high Doppler frequency components by a low-pass filter leads to better performance in terms of noise equivalent sigma zero (NESZ) for the same quantization rate. However, if the transfer function of the filter is not flat in the processed bandwidth, an amplification of the quantization noise occurs, when compensating for the filter′s transfer function in the processing.
Authors with CRIS profile
Additional Organisation(s)
Involved external institutions
Germany (DE)How to cite
APA:
Villano, M., Martone, M., Del Zoppo, V., & Krieger, G. (2014). Joint effects of on-board Doppler filtering and quantization in spaceborne SAR systems. In IEEE GOLD Remote Sensing Conference 2014.
MLA:
Villano, Michelangelo, et al. "Joint effects of on-board Doppler filtering and quantization in spaceborne SAR systems." Proceedings of the IEEE GOLD Remote Sensing Conference 2014 2014.
BibTeX: Download