On two-direction spatial smoothing for estimation angle-of-direction of coherent signals
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Based on Evans’ spatial smoothing preprocessing scheme, a new approach called two-direction spatial smoothing preprocessing method is presented. It is proved that the decorrelation, the effective aperture and the maximum number of distinguishable coherent signals (when array size is given) of the new method are better than those of the Evans’ method. Simulation results give a comparison between the eigenvector spectrums produced by the two methods.
Key wordsArray antenna Coherent signal Two-direction spatial smoothing method
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