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Improved Detection of a Target on a Random Rough Surface Using Angular Correlation Function
| Content Provider | Semantic Scholar |
|---|---|
| Author | Jaruwatanadilok, Sermsak Roy, Sumit Kuga, Yasuo |
| Copyright Year | 2010 |
| Abstract | Detection of a target in cluttered environment based on electromagnetic wave scattering has been considered for many years [1-3]. In this work, we consider detection of a target situated on top of a random rough surface, whereby the scatter component from the surface is considered to be background clutter. Detector design is traditionally based on the difference in the characteristics of the returned signal from background clutter alone vis-à-vis target+clutter, and usually only exploits the differences in the observed wave intensity (or equivalently, radar cross section or RCS) [4],[5]. Our primary contribution is the analysis of detection probability when using the angular correlation function (ACF) for enhanced detection which correlates the scattered signal at two different angles. The ACF has been used in subsurface detection [6],[7], but there is no analysis of the improvement in detection in terms of probability of detection and false alarm. In our previous work, we exploited the strong correlation from rough surface scattering for sea-ice [8] and snow thickness determination [9]. However, for target detection on random rough surface, the effect from rough surface scattering is to be minimized. The scattered signal from the background as a function of elevation angle exhibits strong peaks at certain combination of frequencies and incident and observed angles. Hence, by careful choice of transmitting frequencies and incident and observed angles, we should be able to reduce the effects of rough surface scattering. Here, we derive the statistical properties of the ACF of a scattered wave from a random rough surface and its relationship to the physical parameters of the rough surface and observation system geometry. Then we analyze the probability of detection versus probability of false alarm using ACF and RCS which shows that the receiver operating characteristics (ROC) of the detector using ACF is conclusively superior to that using RCS. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://vigir.missouri.edu/~gdesouza/Research/Conference_CDs/IGARSS_2010/pdfs/2647.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
