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| Robust Estimation of Scattering Center Parameters in Long-Tailed K-Distribution Clutter |
| Shi Zhi-guang; Zhou Jian-xiong; Zhao Hong-zhong; Fu Qiang |
| ATR Lab, National University of Defence Technology, Changsha 410073, China |
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Abstract When the parameter estimation of Damped Exponentials (DE) based scattering center model is considered in real life situation, the noise is always non-Gaussian and has long-tailed distribution. The estimation error in such noise may be large if the estimator under gauss-noise assumption is used. In this paper, the M-estimation method is used to obtain robust parameter estimation of DE-model in long-tailed clutter. Firstly, the shortcoming of Prony-based M-estimation method is analyzed. Then, other two effective methods to realize M-estimation of DE-model are proposed. A comparative study of these two methods is carried on about their estimation performance. Lastly, Monte-Carlo simulation test is performed to validate the proposed methods. The results show that the two proposed methods both give better estimation results in long-tailed K-Distribution clutter.
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Received: 20 April 2006
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2007, Vol. 29 
