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2024 IEEE 18th International Symposium on Applied Computational Intelligence and Informatics (SACI) / 23-25 May 2024

Differentiable Particle Filtering Using Optimal Placement Resampling

Particle filters are a frequent choice for inference tasks in nonlinear and non-Gaussian state-space models. They can either be used for state inference by approximating the filtering distribution or for parameter inference by approximating the marginal data (observation) likelihood. A good proposal distribution and a good resampling scheme are crucial to obtain low variance estimates. However, traditional methods like multinomial resampling introduce non-differentiability in particle filter-based loss functions for parameter estimation, prohibiting gradient-based learning tasks. This work proposes a differentiable resampling scheme by deterministic sampling from an empirical cumulative distribution function. We evaluate our method on parameter inference tasks and proposal learning.

Url
https://doi.org/10.1109/SACI60582.2024.10619755
Authors
Csuzdi, D.
Törő, O.
Bécsi, T.
Institutes

Kapcsolat

Prof. Dr. Péter Gáspár

H-1111 Budapest, Kende u. 13-17.

+36 1 279 6000

autonom@nemzetilabor.hu

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