Signal decorrelation by spatial smoothing for spherical microphone arrays

Dmitry Khaykin, Boaz Rafaely

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

6 Scopus citations

Abstract

Spatial smoothing (SS) is a preprocessing technique that was shown to be efficient in decorrelating coherent signals thus making eigenstructure methods, like MUSIC, operative in a coherent interference environment. However, up to date the application of this technique to spherical arrays was not presented. The spherical array configuration provides desired 3- D symmetry and facilitates the estimation of both azimuth and elevation angles with the same accuracy. One of the approaches to perform SS is to construct arrays which are shifted versions of the original array. In this paper we investigate conditions on the locations of the shifted arrays to ensure efficient performance of SS, i.e. increase in the rank of the signals covariance matrix.

Original languageEnglish
Title of host publication2008 IEEE 25th Convention of Electrical and Electronics Engineers in Israel, IEEEI 2008
Pages270-274
Number of pages5
DOIs
StatePublished - 1 Dec 2008
Event2008 IEEE 25th Convention of Electrical and Electronics Engineers in Israel, IEEEI 2008 - Eilat, Israel
Duration: 3 Dec 20085 Dec 2008

Publication series

NameIEEE Convention of Electrical and Electronics Engineers in Israel, Proceedings

Conference

Conference2008 IEEE 25th Convention of Electrical and Electronics Engineers in Israel, IEEEI 2008
Country/TerritoryIsrael
CityEilat
Period3/12/085/12/08

Keywords

  • Coherent interference
  • Doa estimation
  • Spatial smoothing
  • Spherical arrays

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