ISAR Imaging Based on Multiple Measurement Vector Model Sparse Signal Recovery Algorithm

Algorithm 1

The block SL0 sparse signal recovery algorithm based on MMV model.

(I)	Initialization
(1)	is the minimum norm solution of
(2)	One decreasing sequence :
(II)	For :
(1)	Let ,
(2)	Minimize the function on the feasible set
(a)	Initialization:
(b)	Let be gradient of
(c)	(where is a small positive constant)
(d)	If , project back into the feasible set :
(e)	Compare step
	If
	If
(3)	Set .
(III)	Final solution is