Method and apparatus for operating a non-orthogonal multiple access scheme in multiuser beamforming system

摘要

A frequency-efficient antenna operation method is provided in a multiuser beamforming system. The method includes determining channel correlations and channel gain differences between channels using channel information received from multiple terminals, classifying the multiple terminals into at least one or more clusters using the channel correlations and channel gain differences, selecting a beamforming vector for each of the one or more clusters using the channel information of at least one or more terminals in the one or more clusters, allocating power to the terminals in each of the one or more clusters, and forming a beam based on the allocated power and the selected beamforming vector. According to the method, interference due to sharing space resources may be reduced and more efficient data communication may be achieved.

主权项

1. A method for operating a non-orthogonal multiple access (NOMA) scheme by a base station (BS) in a multiuser beamforming system, the method comprising:
receiving channel information related to channels from a plurality of terminals; determining channel correlations representing correlations between the channels based on the channel information; determining channel gain differences representing differences of gains for the channels based on the channel information; classifying the plurality of terminals into a plurality of groups based on the channel correlations and the channel gain differences; determining a beamforming vector for each of the plurality of groups based on the channel information of terminals in each of the plurality of groups; allocating power to the terminals in each of the plurality of groups; and forming a beam for each of the plurality of groups based on the allocated power and the determined beamforming vector.