A Greedy Multistage Convex Relaxation Algorithm Applied to Structured Group Sparse Reconstruction Problems Based on Iterative Support Detection

Algorithm 2

Dual-based ADM for group sparsity [9].

Set . Initialize , , and .

While stopping criterion is not met Do

(1) Update :

   Compute according to (23) for given .

(2) Update :

   Compute by solving (25).

(3) Update :

   Update via (26).

(4) .

end while