2021
DOI: 10.48550/arxiv.2111.07664
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Improved Gibbs samplers for Cosmic Microwave Background power spectrum estimation

Gabriel Ducrocq,
Nicolas Chopin,
Josquin Errard
et al.

Abstract: We study different variants of the Gibbs sampler algorithm from the perspective of their applicability to the estimation of power spectra of the cosmic microwave background (CMB) anisotropies. We focus on approaches which aim at reducing the cost of a computationally heavy constrained realization step and capitalize on the interweaving strategy to ensure that our algorithms mix well for high and low signal-to-noise ratio components. In particular, we propose an approach, which we refer to as Centered overrelax… Show more

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