High resolution direction of arrival estimation of multiple wide band sources in multichannel adaptive nulling systems.
The main purpose of this paper is to demonstrate that the adaptive weights obtained from different frequency channels can be used for high-resolution direction of arrival (DOA) estimation. It is shown that these weights have sufficient information which can be processed by eigenstructure methods to...
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| Language: | English |
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1996
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| Online Access: | http://ezproxy.villanova.edu/login?url=https://digital.library.villanova.edu/Item/vudl:173315 |
| Summary: | The main purpose of this paper is to demonstrate that the
adaptive weights obtained from different frequency
channels can be used for high-resolution direction of
arrival (DOA) estimation. It is shown that these weights
have sufficient information which can be processed by
eigenstructure methods to yield the signal and the noise
subspaces. As such, with the availability of the adaptive
weights in multichannel nulling system, source
localization using the data matrix or time-averaged
estimation of the covariance matrix may, in most cases,
prove unnecessary and can only add meager improvement
over the proposed method. We present two approaches to
extract the eigenstructures from the multichannel adaptive
weights. Both approaches are based on coherent subspace
averaging, namely the focusing techniques. |
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