Optimizing the Spectrum and Power Allocation for D2D-Enabled Communication Systems Using DC Programming

Algorithm 1

The power allocation optimization using DC programming.

(1)
(2)	set i = 0.
(3)	Initialize the power allocation variables , and , , , the Lagrangian multiplier and .
(4)	Set the convergence threshold .
(5)
(6)	while− (  =  1) and − (  = 1) do
(7)	i = i + 1;
(8)	Compute the optimal power allocation of and according to equations 30 and (31).
(9)	Updating power allocation according to equation (32);
(10)	Solve the dual problem and updating Lagrangian multiplier and (  = 1, 2 , )according to equations (37) and (38) respectively.
(11)	endwhile