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arXiv 0705.2262math.NAcs.NAmath.STstat.COstat.TH
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具有时间尺度分离系统的粒子滤波方差缩减

Variance reduction for particle filters of systems with time-scale separation

University of California(加州大学);Lawrence Berkeley National Laboratory(劳伦斯伯克利国家实验室)

Dror Givon, Panagiotis Stinis, Jonathan Weare

AI总结:

针对时间尺度分离系统,利用平均原理降维和Rao-Blackwell化分解转移概率,结合粗投影积分框架构建粒子滤波器,实现方差缩减和加速。

摘要:

我们提出了一种针对具有时间尺度分离系统的粒子滤波器构造。时间尺度的分离允许我们利用两个简化:i) 使用平均原理对系统进行降维,以便求解每个粒子;ii) 转移概率的分解,允许对滤波步骤进行Rao-Blackwell化。这两种简化都可以使用粗投影积分框架实现。得到的粒子滤波器比基于原始系统的粒子滤波器更快,且方差更小。该方法在一个多尺度随机微分方程和一个由化学反应驱动的多尺度纯跳跃扩散上进行了测试。

英文摘要:

We present a particle filter construction for a system that exhibits time-scale separation. The separation of time-scales allows two simplifications that we exploit: i) The use of the averaging principle for the dimensional reduction of the system needed to solve for each particle and ii) the factorization of the transition probability which allows the Rao-Blackwellization of the filtering step. Both simplifications can be implemented using the coarse projective integration framework. The resulting particle filter is faster and has smaller variance than the particle filter based on the original system. The method is tested on a multiscale stochastic differential equation and on a multiscale pure jump diffusion motivated by chemical reactions.

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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