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55 results on '"Tao, Jian"'

2. A New Adaptive CFAR Detector

Author

Cong'an Xu, Tao Jian, You He, and Xin Feng Gu

Subjects
Engineering, Homogeneous, business.industry, Speech recognition, Detector, Pattern recognition, General Medicine, Artificial intelligence, business, Reference window, Statistic, Cfar detector
Abstract

A new CFAR detector based on Grubbs statistic called G-CFAR detector is proposed and its detection architecture is given.in this paper. Also the values of the threshold in different confidence level are given. The G-CFAR is evaluated through Monte-Carlo simulation in various environments. In homogeneous background, the performance of G-CFAR shows a little worse than that of CA-CFAR. In multiple targets background, the G-CFAR performs robustly, especially when the interfering targets are not confined to a single half of the reference window, the G-CFAR keeps good performance, while the VI-CFAR can not detect the targets effectively .

Published
2011

3. Performance Analysis of a Robust Wavelet Threshold for Heavy-Tailed Noises

Author

Tao Jian, Feng Su, and Guang Fen Wei

Subjects
business.industry, Gaussian, Pattern recognition, General Medicine, Minimax, symbols.namesake, Wavelet, Gaussian noise, Outlier, symbols, Entropy (information theory), Detection theory, Artificial intelligence, business, Mathematics
Abstract

The interesting signal is often contaminated by heavy-tailed noise that has more outliers than Gaussian noise. A robust wavelet threshold based on the minimax description length principle is derived in the ε-contaminated normal family for maximizing the entropy. Compared with classical threshold based on Gaussian assumption, the robust threshold can eliminate the heavy-tailed noise better, even if the precise value of ε is unknown, which shows its robustness. The further experiment shows that soft threshold is more suitable than hard threshold for robust wavelet threshold technique.

Published
2010

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