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arXiv 1509.04580stat.MLcs.SYeess.SY
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最大相关熵卡尔曼滤波器

Maximum Correntropy Kalman Filter

Xi’an Jiaotong University(西安交通大学);University of Florida(佛罗里达大学)

Badong Chen, Xi Liu, Haiquan Zhao, José C. Príncipe

AI总结:

本文提出最大相关熵卡尔曼滤波器,用于改善传统卡尔曼滤波在非高斯噪声下的鲁棒性,通过最大相关熵准则替代最小均方误差准则,提供更稳定的估计。

摘要:

传统卡尔曼滤波(KF)是在著名的最小均方误差(MMSE)准则下推导的,这在高斯假设下最优。然而,当信号非高斯,尤其是系统受重尾脉冲噪声干扰时,KF性能会严重下降。为此,本文提出新的卡尔曼滤波器,称为最大相关熵卡尔曼滤波器(MCKF),采用稳健的最大相关熵准则(MCC)作为最优准则,而非MMSE。与传统KF类似,MCKF使用状态均值和协方差矩阵传播方程来提供状态和协方差矩阵的先验估计。然后采用新的固定点算法更新后验估计。给出了保证固定点算法收敛的充分条件。通过示例演示了新算法的有效性和鲁棒性。

英文摘要:

Traditional Kalman filter (KF) is derived under the well-known minimum mean square error (MMSE) criterion, which is optimal under Gaussian assumption. However, when the signals are non-Gaussian, especially when the system is disturbed by some heavy-tailed impulsive noises, the performance of KF will deteriorate seriously. To improve the robustness of KF against impulsive noises, we propose in this work a new Kalman filter, called the maximum correntropy Kalman filter (MCKF), which adopts the robust maximum correntropy criterion (MCC) as the optimality criterion, instead of using the MMSE. Similar to the traditional KF, the state mean and covariance matrix propagation equations are used to give prior estimations of the state and covariance matrix in MCKF. A novel fixed-point algorithm is then used to update the posterior estimations. A sufficient condition that guarantees the convergence of the fixed-point algorithm is given. Illustration examples are presented to demonstrate the effectiveness and robustness of the new algorithm.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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