MMW-NOMA: An Uplink NOMA Communication System Based on the Node Pairing Algorithm of Maximum and Minimum Weight in Underwater Acoustic Networks

Algorithm 2

The node replacement algorithm.

1: Procedure()

2: Input: τ    //input the channel correlation threshold

3: For(i =0; i <20; i++)

4:  {

5:   For(j =20; j >0; j--)

6:    {

7:       //count for the channel correlation

8:     //count for the channel gain difference set

9:   }

10:   If(){

11:        //replace FEN_j with node x

12:   

      //modify channel gain difference

13:   }

14:   Else

15:   {

16:    //keep the initial node pair

17:    }

18:   Output:;

19:  }

18: End procedure