Combination of weighted ?2,1 minimization with unitary transformation for DOA estimation
The weighted ?2,1 ? 2 , 1 minimization is combined with the unitary transformation. This combination improves the resolution and accuracy of DOA estimation. More credible weights can be obtained after performing the unitary transformation. The jointly sparse constraint can be further enhanced. The implied spatial smoothing improves the decorrelation ability.
1 unitary transformation direction-of-arrival (doa) estimation uniform linear array (ula) weighted ?2 1 ? 2 1 minimization ?2 1 ?2