Hybrid Beamforming Grouping Sum-Rate Maximization Algorithm for Multiuser mmWave Massive MIMO Systems

Algorithm 1

HBG-SRM algorithm.

Proposed ADS-MBT scheme.

1.Input;

2.Output: The optimal beamforming vector ;

3.Set: Correlation by (13), extract index by (14);

4.Calculation: correlation threshold by (15);

5.Options: , from the remaining users , form a set ; let ; represents the candidate set of the element in ;

6.Determine: If , has only elements. If , the th element in is a member of . If , , determine the th element in according to (17) and (18);

7.Update、, by (15), (16), repeat the process until the group is complete;

8.Grouping: Repeat (14)–(18) to group the remaining users until all users are grouped;

9.Intragrouping Identification: From (19) to (22), ML criterion is used in each group to identify the optimal beam and estimate its beamforming gain;

10. Intergrouping Confirmation: The gain of all candidate optimal beams is compared between each group by (23) to confirm the optimal beamforming vector , BS uses it for downlink transmission.