Instantaneous DOA estimation for moving wideband cyclostationary sources under multipath

Cyclostationarity has been exploited in direction of arrival (DOA) estimation due to its signal selectivity and immunity against noise and interference. For coherent signals, e.g., those arising from a multipath propagation environment, the resulting rank deficiency of the signal cyclic correlation...

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Published inProceedings. (ICASSP '05). IEEE International Conference on Acoustics, Speech, and Signal Processing, 2005 Vol. 4; pp. iv/949 - iv/952 Vol. 4
Main Authors Fan, H.H., Huiqin Yan
Format Conference Proceeding
LanguageEnglish
Published IEEE 2005
Subjects
Decorrelation
Direction of arrival estimation
Frequency
Interference
Multiple signal classification
Narrowband
Signal resolution
Smoothing methods
Wideband
Working environment noise
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Summary:Cyclostationarity has been exploited in direction of arrival (DOA) estimation due to its signal selectivity and immunity against noise and interference. For coherent signals, e.g., those arising from a multipath propagation environment, the resulting rank deficiency of the signal cyclic correlation matrix hampers proper DOA estimation. Spatial smoothing (SS) is an effective tool to cope with this problem. However, SS reduces effective array span, thus also reduces the DOA resolution as well as the number of detectable sources. In this paper, we propose an instantaneous DOA estimation method for moving wideband cyclostationary sources under a multipath environment. Based on the movement of the sources, our method is able to decorrelate wideband coherent signals caused by multipath without SS. Effectiveness of our method is demonstrated by simulations.
ISBN:9780780388741
0780388747
ISSN:1520-6149
2379-190X
DOI:10.1109/ICASSP.2005.1416167