Proceedings

Online Expectation Maximization for Reinforcement Learning in POMDPs

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Proceedings of the Twenty-Third International Joint Conference on Artificial Intelligence. Pages 1501-1506.

Abstract

We present online nested expectation maximization for model-free reinforcement learning in a POMDP. The algorithm evaluates the policy only in the current learning episode, discarding the episode after the evaluation and memorizing the sufficient statistic, from which the policy is computed in closed-form. As a result, the online algorithm has a time complexity O(n) and a memory complexity O(1), compared to O(n2) and O(n) for the corresponding batch-mode algorithm, where $n$ is the number of learning episodes. The online algorithm, which has a provable convergence, is demonstrated on five benchmark POMDP problems.

Miao Liu, Xuejun Liao, and Lawrence Carin. 2013. Online Expectation Maximization for Reinforcement Learning in POMDPs. In Proceedings of the Twenty-Third International Joint Conference on Artificial Intelligence, IJCAI-13. IJCAI, 1501–1506. https://ijcai.org/proceedings/2013/224
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