Research Article

Power Allocation for Reducing PAPR of Artificial-Noise-Aided Secure Communication System

Algorithm 4

The triple-iterative algorithm for the optimization problem (4).
Input: transmit antenna number , legal channel , PA parameter for different SNR values (according to reference [47]), modulation symbol with a finite alphabet, AN vector ;
Output: PA matrix , optimized PAPR value ;
(1)Initialize the PAPR value , and the maximum tolerance and the iteration index ;
(2)Repeat {Main Loop}
(3)Initialize the PA matrix , and the iteration index ;
(4)Repeat {Main Loop}
(5)Initialize the iteration variable , , iteration step length , and the iteration index ;
(6)Repeat {Main Loop}
(7)Solve the optimization problem (12) to obtain ;
(8)Update iteration parameters:
,
, and ;
(9)Until;
(10)Update the iteration parameters:
, and ;
(11)Until;
(12)Update the iteration parameters:
, , and ;
(13)Until
(14)Return, .