Secrecy Energy-Efficient UAV Communication via Trajectory Design and Power Control

Algorithm 2

Proposed iterative algorithm to solve (P1).

Input:

Output:,

1: Initialize, which should be feasible in

 (10). Let

2: repeat

3: With fixed UAV trajectory , obtain the

  optimal UAV’s transmit power using (14)

4: With fixed UAV transmit power , obtain

  the optimal solution using Algorithm 1

5: Update ,

  , ,

  , , ,

  , .

6: Update .

7: until converges to a prescribed threshold .