Reconfigurable Intelligent Surface-Aided Cell-Free Massive MIMO with Low-Resolution ADCs: Secrecy Performance Analysis and Optimization

Algorithm 1

Power control optimization algorithm.

(1) Initialization: set , , , and , where is the optimal value of the objective function in (47) and denotes the tolerance

(2) Set , then solve the following optimization problem

Then, update the ; if the problem is feasible, set the or else set that ;

(3) Repeat 2 until the algorithm converges; that is, ; return as the optimal power control coefficients