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Texture invariant estimation of equivalent number of looks based on log-cumulants in polarimetric radar imagery
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作者 Xianghui Yuan Tao Liu 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2017年第1期58-66,共9页
A novel estimation of the equivalent number of looks (ENL) is proposed in statistical modeling of multilook polarimetric synthetic aperture radar (PolSAR) images for the product model, which is based on the log-determ... A novel estimation of the equivalent number of looks (ENL) is proposed in statistical modeling of multilook polarimetric synthetic aperture radar (PolSAR) images for the product model, which is based on the log-determinant moments (LDM). The LDM estimators discovered by looking at certain log-cumulants of the intensities of different polarization channels and the multilook polarimetric covariance matrix, which can be used for both the Gaussian model and all product models. This estimator has analytic expressions, and uses the full covariance matrix and intensities as input, which makes more statistical information available. Experiments based on simulated data and real data are performed. The comparisons among the widely used methods of equivalent number of looks (ENL) estimation for the product model such as K and G0 distributions show that the performance of the LDM estimator is outstanding. The performance of estimators for the real data of San Francisco and Flevoland is analyzed and the results are according to those of simulated data. Finally, it can be concluded that the LDM estimator is well robust to each product model with low computational complexity and high accuracy. © 1990-2011 Beijing Institute of Aerospace Information. 展开更多
关键词 Covariance matrix Matrix algebra Method of moments Parameter estimation polarimeters RADAR Radar imaging Tracking radar
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Novel polarimetric detector for target detection in heterogeneous clutter
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作者 Xu Cheng Longfei Shi +2 位作者 Yuliang Chang Yongzhen Li Xuesong Wang 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2016年第6期1135-1141,共7页
A detection of static or slowly moving targets in the inhomogeneous clutter of polarimetric radar is researched and a new detector without exploiting the training set is developed, which has a good performance against... A detection of static or slowly moving targets in the inhomogeneous clutter of polarimetric radar is researched and a new detector without exploiting the training set is developed, which has a good performance against the inhomogeneous clutter. The decision rule ensures the constant false alarm rate (CFAR) with respect to the disturbance covariance matrix. Numerical results show the robustness of the proposed method against the inhomogeneous clutter. © 2016 Beijing Institute of Aerospace Information. 展开更多
关键词 Clutter (information theory) Covariance matrix Numerical methods polarimeters RADAR Radar clutter Radar signal processing Signal processing
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Radio Disturbance Suppression for Ground Wave Radar
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作者 Qiao, Xiaolin Liu, Yongtan 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 1994年第2期1-11,共11页
A new method of single sample polarization filtering is proposed. The algorithm is fast and suitable for the polarization processing of stationary or nonstationary polarized disturbed signals with one or more independ... A new method of single sample polarization filtering is proposed. The algorithm is fast and suitable for the polarization processing of stationary or nonstationary polarized disturbed signals with one or more independent disturbances. A ground wave polarimetric radar with the ability of radio disturbance suppression is then introduced. Some numerical results demonstrate the effectiveness of single sample polarization filtering method for ground wave polarimetric radar. 展开更多
关键词 ALGORITHMS ATTENUATION Electromagnetic wave polarization Interference suppression polarimeters Radar countermeasures Radar interference Radar transmitters Signal filtering and prediction Telecommunication equipment
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