A Novel Downward-Looking Linear Array SAR Imaging Method Based on Multiple Measurement Vector Model with -Norm

Algorithm 2

MMV-OMP algorithm based on the -norm.

Input: matrix , matrix , threshold ;

Initialization: residue error matrix , support set , sparse matrix , iterative number k=1;

While

   Step 1: Find the new support: ;

   Step 2: Update the support set: ;

   Step 3: Update the sparse matrix ;

   Step 4: Update the residue error , ;

Output: sparse vector