In this paper we present FRIDA---an algorithm for estimating directions of arrival of multiple wideband sound sources. FRIDA combines multi-band information coherently and achieves state-of-the-art resolution at extremely low signal-to-noise ratios. It works for arbitrary array layouts, but unlike the various steered response power and subspace methods, it does not require a grid search. FRIDA leverages recent advances in sampling signals with a finite rate of innovation. It is based on the insight that for any array layout, the entries of the spatial covariance matrix can be linearly transformed into a uniformly sampled sum of sinusoids.
@article{arxiv.1612.00876,
title = {FRIDA: FRI-Based DOA Estimation for Arbitrary Array Layouts},
author = {Hanjie Pan and Robin Scheibler and Eric Bezzam and Ivan Dokmanic and Martin Vetterli},
journal= {arXiv preprint arXiv:1612.00876},
year = {2019}
}