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arXiv 1806.09595math.PRmath.OCmath.STstat.TH
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最优滤波高阶导数的稳定性

Stability of Optimal Filter Higher-Order Derivatives

Vladislav Z. B. Tadic, Arnaud Doucet

摘要:

在许多情况下,状态空间模型依赖于需要从数据中推断的参数。利用随机梯度搜索和最优滤波器(一阶)导数,可以在线估计参数。为了分析非线性状态空间模型中在线参数估计方法的渐近性态,有必要建立最优滤波器高阶导数的存在性和稳定性的结果。研究了这些导数的存在性和稳定性。我们证明了最优滤波器的高阶导数的存在和忘记初始条件指数快速。我们还证明了最优滤波器的高阶导数是几何遍历的。所得到的结果保持在(相对)温和的条件下,并适用于在实践中遇到的状态空间模型。

英文摘要:

In many scenarios, a state-space model depends on a parameter which needs to be inferred from data. Using stochastic gradient search and the optimal filter (first-order) derivative, the parameter can be estimated online. To analyze the asymptotic behavior of online methods for parameter estimation in non-linear state-space models, it is necessary to establish results on the existence and stability of the optimal filter higher-order derivatives. The existence and stability properties of these derivatives are studied here. We show that the optimal filter higher-order derivatives exist and forget initial conditions exponentially fast. We also show that the optimal filter higher-order derivatives are geometrically ergodic. The obtained results hold under (relatively) mild conditions and apply to state-space models met in practice.

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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