Fig. 3From: Direction-of-arrival and power spectral density estimation using a single directional microphone and group-sparse optimizationEstimation errors obtained with GL-LS and GL-L1, as well as with their modified versions which exclude the nonnegativity constraint over the error term (GL-LS\(_0\) and GL-L1\(_0\), respectively), while using different microphone directivity patterns to generate the observed dataBack to article page