Title :
On the spatial-temporal resolution of synthetic aperture radar: Uncertainty principle?
Author :
Zeng Tao ; Chen Xinliang ; Wang Jingyang ; Zhang Kai
Author_Institution :
Sch. of Inf. & Electron., Beijing Inst. of Technol., Beijing, China
Abstract :
Synthetic aperture radar (SAR) systems have been successful in applications of monitoring stationary terrain as well as detecting long-term changes. Recently, new technologies in SAR such as GEO SAR, Circular SAR and SS-BiSAR allow observing an area continuously and provide potential to detect sudden changes. The generalized ambiguity function is extended to analyze the spatial-temporal resolution for change detection. The lower bound of temporal resolution is derived and utilized to establish an uncertainty principle analogous to the uncertainty principle in signal analysis. The influence of the type and extent of changes in two typical cases is studied. The results show that the product of spatial and temporal resolution is bounded no matter how the synthetic aperture time is configured. The theoretic results are verified by simulation.
Keywords :
radar detection; radar resolution; synthetic aperture radar; GEO SAR system; SS-BiSAR system; circular SAR system; generalized ambiguity function; long-term change detection; signal analysis; spatial-temporal resolution; stationary terrain monitoring; synthetic aperture radar resolution; uncertainty principle; Apertures; Azimuth; Signal resolution; Spatial resolution; Synthetic aperture radar; Uncertainty; Circular SAR; GEO SAR; Synthetic Aperture Radar; change detection; lower bound; spatial-temporal resolution; uncertainty principle; uncertainty product;
Conference_Titel :
Radar Conference (Radar), 2014 International
DOI :
10.1109/RADAR.2014.7060376
