Joint DL and UL Channel Estimation for Millimeter Wave MIMO Systems Using Tensor Modeling

Algorithm 1

Pseudocode of the B-ALS receiver.

(1)	Set ;
Initialize randomly the factor matrix ;
(2)	;
(3)	From , obtain a LS estimate of :
(4)	From , obtain a LS estimate of :
(5)	Repeat steps 2–4 until convergence. The convergence is achieved when , where is the residual error computed in the i-th iteration.