Abstract
We consider the nonparametric estimation of the intensity function of a Poisson point process in a circular model from indirect observations \(N_1,\ldots ,N_n\). These observations emerge from hidden point process realizations with the target intensity through contamination with additive error. In case that the error distribution can only be estimated from an additional sample \(Y_1,\ldots ,Y_m\) we derive minimax rates of convergence with respect to the sample sizes n and m under abstract smoothness conditions and propose an orthonormal series estimator which attains the optimal rate of convergence. The performance of the estimator depends on the correct specification of a dimension parameter whose optimal choice relies on smoothness characteristics of both the intensity and the error density. We propose a data-driven choice of the dimension parameter based on model selection and show that the adaptive estimator attains the minimax optimal rate.
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Acknowledgements
Financial support by the Deutsche Forschungsgemeinschaft (DFG) through the Research Training Group RTG 1953 is gratefully acknowledged. I am indepted to my supervisors Jan Johannes and Martin Schlather for fruitful discussions and helpful comments on the paper.
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Kroll, M. Nonparametric intensity estimation from noisy observations of a Poisson process under unknown error distribution. Metrika 82, 961–990 (2019). https://doi.org/10.1007/s00184-019-00716-7
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DOI: https://doi.org/10.1007/s00184-019-00716-7