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A modified approach based on covariance differencing technique for a uniform linear array is proposed to the problem of direction finding of narrowband signals under color noise background. By assuming a Hermitian symmetric Toeplitz matrix for the unknown noise, the array covariance matrix is transformed in an appropriate way and the noise component is eliminated finally. It is shown that the presented...
In multipath environments, cyclic MUSIC is failed to detect all incident sources. In order to de-correlate the coherent signals, spatial smoothing (SS) and forward/backward SS techniques have been investigated to resolve this situation, however, all these algorithms will reduce the number of detectable signals and cause the deficiency of array aperture. In this paper, two new approaches called virtual...
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