Evaluation and comparison of three source direction-of-arrival estimators using relative harmonic coefficients

Yonggang Hu, Prasanga N. Samarasinghe, Sharon Gannot, Thushara D. Abhayapala

Research output: Contribution to journalConference articlepeer-review

3 Scopus citations


A spherical harmonics domain source feature called relative harmonic coefficients (RHC) has recently been applied to address the source direction-of-arrival (DOA) estimation problem. This paper presents a compact evaluation and comparison between two existing RHC based DOA estimators: (i) a method using a full grid search over the two-dimensional (2-D) directional space, (ii) a decoupled estimator which uses one-dimensional (1-D) search to separately localize the source’s elevation and azimuth. We also propose a new estimator using a gradient descent search over the 2-D directional grid space. Extensive experiments in both simulated and real-life environments are conducted to examine and analyze the performance of all the underlying DOA estimators. Two objective metrics, including localization accuracy and algorithm complexity, are adopted for an evaluation and comparison between all estimators.

Original languageEnglish
Pages (from-to)815-819
Number of pages5
JournalProceedings - ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing
StatePublished - 2021
Event2021 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2021 - Virtual, Toronto, Canada
Duration: 6 Jun 202111 Jun 2021

Bibliographical note

Publisher Copyright:
©2021 IEEE


  • DOA estimators
  • Gradient descent search
  • Relative harmonic coefficients
  • Spherical harmonics domain


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