Polarimetric Target Detection Using Statistic of the Degree of Polarization

Abstract

Abstract-The degree of polarization (DoP) can be utilized as a detection statistic in the polarimetric radar to achieve target detection performance improvement. In this paper, a polarimetric radar model is established, which includes reflections from both target and clutter at first. Then, probability density functions (PDFs) of the estimated DoP are expressed in closed form, which is derived from joint eigenvalue distributions of complex noncentral Wishart matrices. The detector is developed and evaluated theoretically on the basis of the statistical properties of the DoP. Finally, a comparison between the new DoP detector and single-polarization detector is presented against real data. The performance improvement is demonstrated by the comparison results.

The Target Detection on the Sea Surface Based on Standard Deviation of the Maximum Eigenvalue of the Polarization Covariance Matrix

“…As the above results, the small target detection can be ragarded as a binary decision problem given by (9). The detection results are in the figure 4 to 6 corressponding the data file.…”

“…Radar works at frequency of 9.39 GHz, and the PRF of 1000 Hz. The training data is tested with the proposed method and the result is then compared with results of the DoP and the SP-GLR methods [9]. The detection thresholds are set accordingly so that the false alarm rates in all three cases are ≈ .…”

“…Another approach to solve this problem is to use the degree of polarization (DoP) for the detection, as suggested in [9]. The results of this method seemed to be not reasonable as the probability of detection with the same false alarm rate and the same target at higher wave height (h=1,4 m) is better than the case whith lower wave height (h=0,9 m).…”