Cited by 398Direction-of-Arrival Estimation TechniquesSpeech and Audio ProcessingTarget Tracking and Data Fusion in Sensor Networks

Source localization using recursively applied and projected (RAP) MUSIC

Mosher, J.C., Leahy, R.M.·1999·IEEE Transactions on Signal Processing

Abstract

A new method for source localization is described that is based on a modification of the well-known MUSIC algorithm. In classical MUSIC, the array manifold vector is projected onto an estimate of the signal subspace. Errors in the estimate of the signal subspace can make localization of multiple sources difficult. Recursively applied and projected (RAP) MUSIC uses each successively located source to form an intermediate array gain matrix and projects both the array manifold and the signal subspace estimate into its orthogonal complement. The MUSIC projection to find the next source is then performed in this reduced subspace. Special assumptions about the array manifold structure, such as Vandermonde or shift invariance, are not required. Using the metric of principal angles, we describe a general form of the RAP-MUSIC algorithm for the case of diversely polarized sources. Through a uniform linear array simulation with two highly correlated sources, we demonstrate the improved Monte Carlo error performance of RAP-MUSIC relative to MUSIC and two other sequential subspace methods: S and IES-MUSIC. We then demonstrate the more general utility of this algorithm for multidimensional array manifolds in a magnetoencephalography (MEG) source localization simulation.

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Crossref · 10.1109/78.740118

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Authors
Mosher, J. C., & Leahy, R. M.
Affiliations
  • Los Alamos National Laboratory (US)
  • University of Southern California (US)
Venue
IEEE Transactions on Signal Processing
Published
1999
Volume
47
Issue
2
Pages
332-340
ISSN
1053-587X (ISSN-L)
OpenAlex
W2126767504
Cited by
398
References
16
Citations by year
2026: 6 · 2025: 13 · 2024: 11 · 2023: 15 · 2022: 18 · 2021: 19 · 2020: 17 · 2019: 16 · 2018: 20 · 2017: 24 · 2016: 8 · 2015: 19 · 2014: 16 · 2013: 15 · 2012: 17
FWCI
11.99
Type
journal article
Language
en
Open access
closed
Locations
IEEE Transactions on Signal Processing (publishedVersion)
Funders
  • University of Southern California
  • Villanova University
Topics
  • Physical Sciences › Computer Science › Signal Processing › Direction-of-Arrival Estimation Techniques
  • Physical Sciences › Computer Science › Signal Processing › Speech and Audio Processing
  • Physical Sciences › Computer Science › Artificial Intelligence › Target Tracking and Data Fusion in Sensor Networks
Keywords
source localization, rap music, MUSIC algorithm, signal subspace estimation, principal angles, correlated sources, uniform linear array, magnetoencephalography

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