Estimation of Multiple Coherent Source Locations by Using SPM Method Combined with Signal Subspace Fitting Technique

Kazumasa TAIRA
Risaburo SATO

IEICE TRANSACTIONS on Communications   Vol.E88-B    No.8    pp.3164-3169
Publication Date: 2005/08/01
Online ISSN: 
DOI: 10.1093/ietcom/e88-b.8.3164
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section of 2004 International Symposium on Electromagnetic Compatibility)
Category: Measurements
EMC,  electric field,  SPM method,  WSF method,  calibration,  estimation of electromagnetic source location,  

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A visualization method of coherent source locations based on the Sampled Pattern Matching (SPM) method is described. Modified SPM method is proposed to improve the S/N, in which the measurement of the electric field distribution is repeated in appropriate time duration and eigenvalue decomposition of the covariance matrix is introduced. A combination of the modified SPM method with the Weighted Subspace Fitting (WSF) method is also proposed to estimate accurate source locations. A calibration technique by using a reference antenna to compensate the complex pattern of the receiving antenna is proposed. Experimental investigation to estimate source location for one dipole antenna and two dipole antennas is also made to demonstrate the validity of the proposed method.