tailieunhanh - Báo cáo hóa học: " Research Article An Efficient Kernel Optimization Method for Radar High-Resolution Range Profile Recognition"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article An Efficient Kernel Optimization Method for Radar High-Resolution Range Profile Recognition | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2007 Article ID 49597 10 pages doi 2007 49597 Research Article An Efficient Kernel Optimization Method for Radar High-Resolution Range Profile Recognition Bo Chen Hongwei Liu and Zheng Bao National Key Laboratory for Radar Signal Processing Xidian University Xi an 710071 Shaanxi China Received 15 September 2006 Accepted 5 April 2007 Recommended by Christoph Mecklenbrauker A kernel optimization method based on fusion kernel for high-resolution range profile HRRP is proposed in this paper. Based on the fusion of l1 -norm and l2-norm Gaussian kernels our method combines the different characteristics of them so that not only is the kernel function optimized but also the speckle fluctuations of HRRP are restrained. Then the proposed method is employed to optimize the kernel of kernel principle component analysis KPCA and the classification performance of extracted features is evaluated via support vector machines SVMs classifier. Finally experimental results on the benchmark and radar-measured data sets are compared and analyzed to demonstrate the efficiency of our method. Copyright 2007 Bo Chen et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. 1. INTRODUCTION Radar automatic target recognition RATR is to identify the unknown target from its radar-echoed signatures. Target high-range-resolution profile contains more detail target structure information than that of low-range-resolution radar echoes so it plays an important role in RATR community 1-4 . As is known radar HRRP is a strong function of target aspect and serious speckle fluctuation may exist when target-radar orientation changes which makes HRRP RATR a challenge task. In addition target may exist at any position in real system thus the position of an .