摘要
In this paper, we consider the nonlinear filtering by using information geometric approach. Under the principle of Bayesian, the filtering problem has been converted to Bayesian estimation. Based on the estimation conditional on the measurement, the posterior probability density functions(PDFs) have constructed a statistical manifold. With the information geometric approach, the nonlinear characteristic has been convert to the Riemannian metric tensor, and the Bayesian estimation has been obtained by the natural gradient descent technique. Further, the information geometric nonlinear filtering has been induced. For the linear and Gaussian case, the metric tensor is constant, and the proposed method will be equivalent to the traditional Kalman filter. While the nonlinear case, the metric tensor is variable in which need be computed at each point on the statistical manifold, and the proposed method will be convergence along the optimal direction. The numerical experiment will show the better performance of our proposed method.
In this paper, we consider the nonlinear filtering by using information geometric approach. Under the principle of Bayesian, the filtering problem has been converted to Bayesian estimation. Based on the estimation conditional on the measurement, the posterior probability density functions(PDFs) have constructed a statistical manifold. With the information geometric approach, the nonlinear characteristic has been convert to the Riemannian metric tensor, and the Bayesian estimation has been obtained by the natural gradient descent technique. Further, the information geometric nonlinear filtering has been induced. For the linear and Gaussian case, the metric tensor is constant, and the proposed method will be equivalent to the traditional Kalman filter. While the nonlinear case, the metric tensor is variable in which need be computed at each point on the statistical manifold, and the proposed method will be convergence along the optimal direction. The numerical experiment will show the better performance of our proposed method.
引文
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