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• W657226898 abstract "State space models represent a flexible class of Bayesian time series models which can be applied to model latent state stochastic processes. Sequential Monte Carlo (SMC) algorithms, also known as particle filters, are perhaps the most widely used methodology for inference in such models, particularly when the model is nonlinear and cannot be evaluated analytically. The SMC methodology allows for the sequential analysis of state space models in online settings for fast inference, but can also be applied to study offline problems. This area of research has grown rapidly over the past 20 years and has lead to the development of important theoretical results. This thesis builds upon the SMC framework to address problems of parameter estimation for state space models. Due to the nonlinearity of some models, maximising the likelihood function of a state space model cannot be done analytically. This thesis proposes a new methodology for performing parameter estimation based on a gradient ascent algorithm, where the gradient is approximated using a particle filter. This new approach is shown to estimate parameters both online and offline and with a computational cost that is linear in the number of particles. This is an improvement over previously proposed approaches which either display quadratically increasing" @default.
• W657226898 created "2016-06-24" @default.
• W657226898 creator A5079845478 @default.
• W657226898 date "2014-01-01" @default.
• W657226898 modified "2023-09-26" @default.
• W657226898 title "Parameter estimation for state space models using sequential Monte Carlo algorithms" @default.
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