Coherent signals direction-of-arrival estimation using a spherical microphone array: Frequency smoothing approach

Dima Khaykin, Boaz Rafaely

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

105 Scopus citations

Abstract

Direction-of-arrival (DOA) estimation of coherent signals is considered of great importance in signal processing. To estimate both azimuth and elevation angle with the same accuracy, 3-dimensional (3-D) array must be used. Spherical arrays have the advantage of spherical symmetry, facilitating 3-D DOA estimation. To apply high resolution subspace DOA estimation algorithms, such as MUSIC, in a coherent environment, a smoothing technique is required. This paper presents the development of a smoothing technique in the frequency domain for spherical microphone arrays. We show that frequency smoothing can be efficiently performed using spherical arrays due to the decoupling of frequency and angular components. Experimental comparison of DOA estimation between beamforming and MUSIC with frequency smoothing is performed with data measured in a real auditorium.

Original languageEnglish
Title of host publication2009 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics, WASPAA 2009
Pages221-224
Number of pages4
DOIs
StatePublished - 1 Dec 2009
Event2009 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics, WASPAA 2009 - New Paltz, NY, United States
Duration: 18 Oct 200921 Oct 2009

Publication series

NameIEEE Workshop on Applications of Signal Processing to Audio and Acoustics

Conference

Conference2009 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics, WASPAA 2009
Country/TerritoryUnited States
CityNew Paltz, NY
Period18/10/0921/10/09

Keywords

  • Direction-of-arrival estimation
  • Multipath
  • Spherical microphone array
  • Wideband sources

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Computer Science Applications

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