Coordinated Precoding for D2D Communications Underlay Uplink MIMO Cellular Networks

Algorithm 2

Distributed precoding algorithm for solving problem (P1).

(1) initially set , , , , , , , , and .

(2) repeat

(3)  compute , with , and compute , with .

(4)   for  

(5)   compute by solving problem (P4.2) with CVX solver [22].

(6)   end for

(7)  compute

(8)   if  

(9)   .

(10)  elseif  

(11)   .

(12)  endif

(13)  update , and update with .

(14)  compute according to (4).

(15) until the termination criteria is satisfied.

(16) return   and .