On the Bias of Direction of Arrival Estimation Using Linear Microphone Arrays
Jacob, Florian
Haeb-Umbach, Reinhold
This contribution investigates Direction of Arrival (DoA) estimation using linearly arranged microphone arrays. We are going to develop a model for the DoA estimation error in a reverberant scenario and show the existence of a bias, that is a consequence of the linear arrangement and limited field of view (FoV) bias: First, the limited FoV leading to a clipping of the measurements, and, second, the angular distribution of the signal energy of the reflections being non-uniform. Since both issues are a consequence of the linear arrangement of the sensors, the bias arises largely independent of the kind of DoA estimator. The experimental evaluation demonstrates the existence of the bias for a selected number of DoA estimation methods and proves that the prediction from the developed theoretical model matches the simulation results.
2016
info:eu-repo/semantics/conferenceObject
doc-type:conferenceObject
text
https://ris.uni-paderborn.de/record/11829
Jacob F, Haeb-Umbach R. On the Bias of Direction of Arrival Estimation Using Linear Microphone Arrays. In: <i>12. ITG Fachtagung Sprachkommunikation (ITG 2016)</i>. ; 2016.
eng
info:eu-repo/semantics/openAccess