tailieunhanh - Báo cáo hóa học: "Research Article Quad-Quaternion MUSIC for DOA Estimation Using Electromagnetic Vector Sensors"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Quad-Quaternion MUSIC for DOA Estimation Using Electromagnetic Vector Sensors | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2008 Article ID 213293 14 pages doi 2008 213293 Research Article Quad-Quaternion MUSIC for DOA Estimation Using Electromagnetic Vector Sensors Xiaofeng Gong Zhiwen Liu and Yougen Xu Department of Electronic Engineering Beijing Institute of Technology Beijing 100081 China Correspondence should be addressed to Yougen Xu yougenxu@ Received 24 April 2008 Revised 22 October 2008 Accepted 22 December 2008 Recommended by Jacques Verly 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 quadquaternion signal and noise subspaces. Due to the stronger constraints that quad-quaternion orthogonality imposes on quadquaternion 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. Copyright 2008 Xiaofeng Gong et al. 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. 1. INTRODUCTION A complete electromagnetic EM vector sensor comprises six collocated and orthogonally oriented EM sensors . short dipole and small loop and provides complete electric and magnetic field measurements induced by an EM incidence 1-3 . An incomplete EM vector sensor with one or more components removed is also of high interest in some practical applications 4 5 . Numerous algorithms for direction-of-arrival DOA estimation using one or more EM vector sensors have been proposed. For example vector sensor-based maximum likelihood strategy was .