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  • Research Article
  • Open Access

Quad-Quaternion MUSIC for DOA Estimation Using Electromagnetic Vector Sensors

EURASIP Journal on Advances in Signal Processing20092008:213293

  • Received: 24 April 2008
  • Accepted: 22 December 2008
  • Published:


A new quad-quaternion model is herein established for an electromagnetic vector-sensor array, under which a multidimensional algebra-based direction-of-arrival (DOA) estimation algorithm, termed as quad-quaternion MUSIC (QQ-MUSIC), is proposed. This method provides DOA estimation (decoupled from polarization) by exploiting the orthogonality of the newly defined "quad-quaternion" signal and noise subspaces. Due to the stronger constraints that quad-quaternion orthogonality imposes on quad-quaternion vectors, QQ-MUSIC is shown to offer high robustness to model errors, and thus is very competent in practice. Simulation results have validated the proposed method.


  • Information Technology
  • Estimation Algorithm
  • Model Error
  • Quantum Information
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Authors’ Affiliations

Department of Electronic Engineering, Beijing Institute of Technology, Beijing, 100081, China


© Xiaofeng Gong et al. 2008

This article is published under license to BioMed Central Ltd. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.