Secrecy in Wireless Information and Power Transfer for One-Way and Two-Way Untrusted Relaying with Friendly Jamming

Algorithm 1

Power allocation algorithm in two-way relay case.

INPUT: initial value , step value , convergence rate ,

numbers of channel blocks

OUTPUT: optimal power allocation

STEPS:

() Based on , and , calculates and

() Repeat:

() calculate and

() find and

() If ,

() calculate and for updating power allocation

() Else

() the channel state completes the power allocation,

() until: the condition where the rate is convergent.