Opportunistic NOMA-Based Massive MIMO Precoding for 5G New Radio

Algorithm 1

Selection algorithm for NOMA group users.

Input:

All user data configurations,

Initializtion:

Indices of the NOMA group user, ndex = ; Indices of the multicast group user, ndex1 = ; Indices of the pre-NOMA

group user, ndex2 = ;

Selection:

1: Estimating the distance from the base station to every user by .

2: Estimating the path loss based on the distance. The path loss is recorded in the vector

3: for

4: if

5: ;

6: end

7: if

8: ;

9: end

10: end

11: Some users are selected from ndex2 as NOMA group users; these selected users need to be in the same beam

as a certain user in ndex1. ndex shows all the indices of the NOMA group users.

Output:

Return the indices of the NOMA group users, .