Using Received Power in Microphone Arrays to Estimate Direction of Arrival

Autor:	Zetterqvist, Gustav, Gustafsson, Fredrik, Hendeby, Gustaf
Rok vydání:	2023
Předmět:	Electrical Engineering and Systems Science - Signal Processing
Druh dokumentu:	Working Paper
Popis:	Conventional direction of arrival (DOA) estimators are based on array processing using either time differences or beamforming. The proposed approach is based on the received power at each microphone, which enables simple hardware, low sampling frequency and small arrays. The problem is recast into a linear regression framework where the least squares method applies, and the main drawback is that different sound sources are not readily separable. Our proposed approach is based on a training phase where the directional sensitivity of each microphone element is estimated. This model is then used as a fingerprint of the observed power vector in a real-time estimator. The learned power vector is here modeled by a Fourier series expansion, which enables Cram\'er-Rao lower bound computations. We demonstrate the performance using a circular array with eight microphones with promising results. Comment: Accepted for publication in ICASSP 2023-2023 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2305.02915 Zobrazit plný text záznamu View this record from Arxiv