DISTRIBUTED MULTI-CELL MULTI-USER BEAMFORMING METHOD, TRANSMITTER AND RELEVANT SYSTEM

摘要

Disclosed are a distributed multi-cell multi-user beamforming method, a transmitter and a relevant system. In the distributed beamforming method in the embodiments of the present invention, beamforming coordinated calculation is performed by a plurality of transmitters, and an interference matrix among the transmitters is used to perform an iterative operation on a beamforming vector corresponding to the data which is to be sent to each user over each sub-channel of this cell, so that the interference dimension of each user over each sub-channel of the transmitters is compressed into a subspace as small as possible.

主权项

1. A multi-cell multi-user distributed beamforming method, comprising:
transmitting, by a transmitter, channel coefficient matrix information of a cell that the transmitter belongs to other transmitter performing coordinated beamforming with the transmitter, wherein the channel coefficient matrix information of the cell that the transmitter belongs to comprises a channel coefficient matrix for each user in each subchannel of the cell that the transmitter belongs to; acquiring channel coefficient matrix information of the other transmitter, wherein the channel coefficient matrix information of the other transmitter comprises a channel coefficient matrix for each user in each subchannel of the other transmitter; calculating a beamforming vector corresponding to data to be transmitted to each user in each subchannel of the cell that the transmitter belongs to and an interference matrix of the cell that the transmitter belongs to the other transmitter according to the channel coefficient matrix for each user in each subchannel of the cell that the transmitter belongs to and the channel coefficient matrix information of the other transmitter; transmitting the interference matrix of the cell that the transmitter belongs to the other transmitter to the other transmitter, so that the next transmitter performing the coordinated beamforming with the transmitter updates the beamforming vector of the next transmitter and an interference matrix of the next transmitter to other cell; acquiring an interference matrix of the other transmitter to the cell that the transmitter belongs to updated by the other transmitter; when the transmitter is polled to perform calculation, updating, by the transmitter, the beamforming vector corresponding to the data to be transmitted to each user in each subchannel of the cell that the transmitter belongs to according to a last acquired interference matrix of the other transmitter to the cell that the transmitter belongs to; and determining whether a preset operational-stop condition is satisfied currently; in a case that the preset operational-stop condition is satisfied currently, transmitting the data of each user according to a last updated beamforming vector corresponding to the data to be transmitted to each user in each subchannel of the cell that the transmitter belongs to; and in a case that the preset operational-stop condition is not satisfied currently, calculating the interference matrix of the cell that the transmitter belongs to the other transmitter according to the updated beamforming vector corresponding to the data to be transmitted to each user in each subchannel of the cell that the transmitter belongs to, and repeatedly performing the processes of transmitting the interference matrix of the cell that the transmitter belongs to the other transmitter to the other transmitter, acquiring the interference matrix of the other transmitter to the cell that the transmitter belongs to updated by the other transmitter, updating the beamforming vector corresponding to the data to be transmitted to each user in each subchannel of the cell that the transmitter belongs to, and determining whether the preset operational-stop condition is satisfied currently.