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An efficient vector sensor configuration for source localization
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DOI：10.1109/LSP.2004.831682.png)
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An electromagnetic vector-sensor enables estimation of the direction of arrival (DOA) and polarization of an incident electromagnetic wave with arbitrary polarization. In this letter, an efficient vector-sensor configuration is proposed. This configuration includes the minimal number of sensors, which enables DOA estimation of an arbitrary polarized signal from any direction except two opposite directions on the z-axis. The configuration is obtained by analyzing the Cramer-Rao lower bound (CRLB) for source localization using a single vector-sensor. The resulting vector-sensor configuration consists of two electric and two magnetic sensors. It is shown that this quadrature configuration satisfies the necessary and sufficient conditions for the DOA estimation problem. The CRLB for DOA estimation of signals in the azimuth plane is identical for the quadrature and the complete vector-sensor configurations.
Keyword:
Cramer-Rao lower bound (CRLB)
direction-of-arrival (DOA) estimation
electromagnetic vector sensors
Fisher information matrix (FIM)
polarization
quadrature vector sensor
source localization
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9.6
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1.1W
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1.7W
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