arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 0709.3448math.STstat.TH
收藏

关于辅助粒子滤波

On the auxiliary particle filter

Randal Douc, Eric Moulines, Jimmy Olsson

摘要:

本文研究了由pitt和shephard(1999)提出的辅助粒子滤波器(APF)产生的加权样本的渐近性质。除了建立光滑粒子估计的中心极限定理(CLT)外,我们还得到了有限粒子样本量下的Lp误差和偏差的界.通过检查递归公式的渐近方差的CLT,我们确定第一阶段的重要性权重的渐近方差的增加,在一个单一的迭代算法是最小的。根据这些发现,我们讨论并演示了几个例子如何APF算法可以改进。

英文摘要:

In this article we study asymptotic properties of weighted samples produced by the auxiliary particle filter (APF) proposed by pitt and shephard (1999). Besides establishing a central limit theorem (CLT) for smoothed particle estimates, we also derive bounds on the Lp error and bias of the same for a finite particle sample size. By examining the recursive formula for the asymptotic variance of the CLT we identify first-stage importance weights for which the increase of asymptotic variance at a single iteration of the algorithm is minimal. In the light of these findings, we discuss and demonstrate on several examples how the APF algorithm can be improved.

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。

↑