A Scale-Invariant Approach for Sparse Signal Recovery
A Scale-Invariant Approach for Sparse Signal Recovery
In this paper, we study the ratio of the $L_1 $ and $L_2 $ norms, denoted as $L_1/L_2$, to promote sparsity. Due to the nonconvexity and nonlinearity, there has been little attention to this scale-invariant model. Compared to popular models in the literature, such as the $L_p$ model for $p\in(0,1)$ …