Energy Efficiency Maximization for UAV-Assisted Emergency Communication Networks

Algorithm 3

Overall iterative optimization algorithm for Equation (18).

1. Let . Initialize energy efficiency .

2. repeat

3. Initialize .

4.  repeat

5.   For given and , solve the problem (24)

    to obtain the optimal solution .

6.   For given and , solve the problem

    (33) to obtain the optimal solution

7.   For given and , solve

    the problem (34) to obtain the optimal

    solution via Algorithm 2.

8.   Update .

9.  until Convergence or reaching the maximum

     number of iterations.

10. ifthen

11. return and

  .

12. else

13.  and .

14. until Convergence or reaching .