A least squares narrowband DOA estimator with robustness against phase wrapping
Kabzinski T, Habets E (2019)
Publication Type: Conference contribution
Publication year: 2019
Publisher: European Signal Processing Conference, EUSIPCO
Book Volume: 2019-September
Conference Proceedings Title: European Signal Processing Conference
Event location: A Coruna
ISBN: 9789082797039
DOI: 10.23919/EUSIPCO.2019.8902551
Abstract
Narrowband direction-of-arrival (DOA) estimates are commonly used for source localization, parametric spatial audio coding, and directional filtering. As previously shown, a linear least squares direction estimate can be obtained by minimizing the difference of expected and observed inter-microphone phase differences. In this work, it is shown that phase wrapping induces severe estimation errors especially at frequencies just below spatial aliasing frequencies and in low signal-to-noise ratios. A cost function to mitigate the influence of phase wrapping errors on the DOA estimation is proposed. Even though the proposed cost function is nonlinear, it is shown that one iteration of a gradient descent method with proper initialization provides a large improvement when compared to the linear least squares solution.
Authors with CRIS profile
Emanuël Habets
Professur für wahrnehmungsbasierte räumliche Audiosignalverarbeitung (AudioLabs) (Stiftungsprofessur)
Involved external institutions
Germany (DE)How to cite
APA:
Kabzinski, T., & Habets, E. (2019). A least squares narrowband DOA estimator with robustness against phase wrapping. In European Signal Processing Conference. A Coruna, ES: European Signal Processing Conference, EUSIPCO.
MLA:
Kabzinski, Tobias, and Emanuël Habets. "A least squares narrowband DOA estimator with robustness against phase wrapping." Proceedings of the 27th European Signal Processing Conference, EUSIPCO 2019, A Coruna European Signal Processing Conference, EUSIPCO, 2019.
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