Channel Estimation for Broadband Millimeter Wave MIMO Systems Based on High-Order PARALIND Model

Algorithm 1

PARALIND decomposition algorithm.

Input:, , ;

Step 1: Solve the optimization problem (21) to obtain , given , and ;

Step 2: Solve the optimization problem (24) to obtain , given , and ;

Step 3: Solve the optimization problem (27) to obtain , given , and ;

Step 4: Solve the optimization problem (30) to obtain , given , and ;

Step 5: Calculate the residual

If , the iteration is terminated, where is a small number. Otherwise, and turn to step 1;

Output:, , and.