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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 Computationally Efficient DOA and Polarization Estimation of Coherent Sources with Linear Electromagnetic Vector-Sensor Array | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2011 Article ID 490289 10 pages doi 10.1155 2011 490289 Research Article Computationally Efficient DOA and Polarization Estimation of Coherent Sources with Linear Electromagnetic Vector-Sensor Array Zhaoting Liu 1 Jing He 2 and Zhong Liu1 1 Department of Electronic Engineering Nanjing University of Science and Technology Nanjing Jiangsu 210094 China 2 Department of Electrical and Computer Engineering Concordia University Montreal QC Canada H3G 2W1 Correspondence should be addressed to Zhaoting Liu liuzhaoting@163.com Received 3 September 2010 Revised 10 December 2010 Accepted 16 January 2011 Academic Editor Ana Perez-Neira Copyright 2011 Zhaoting Liu 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. This paper studies the problem of direction finding and polarization estimation of coherent sources using a uniform linear electromagnetic vector-sensor EmVS array. A novel preprocessing algorithm based on EmVS subarray averaging EVSA is firstly proposed to decorrelate sources coherency. Then the proposed EVSA algorithm is combined with the propagator method PM to estimate the EmVS steering vector and thus estimate the direction-of-arrival DOA and the polarization parameters by a vector cross-product operation. Compared with the existing estimate methods the proposed EVSA-PM enables decorrelation of more coherent signals joint estimation of the DOA and polarization of coherent sources with a lower computational complexity and requires no limitation of the intervector sensor spacing within a half-wavelength to guarantee unique and unambiguous angle estimates. Also the EVSA-PM can estimate these parameters by parameter-space searching techniques. Monte-Carlo simulations are presented to verify the efficacy of the proposed
