TRANSMISSION METHOD AND BASE STATION FOR DOWNLINK MULTIPLE-INPUT MULTIPLE-OUTPUT

摘要

Disclosed is a transmission method for downlink Multiple-Input Multiple-Output (MIMO), the method comprising: the precoding matrix indicators (PMI) transmitted by at least two user equipment are received and it is determined that the at least two user equipment is in the paired state according to the multi-user MIMO (MU-MIMO) pairing criteria; according to the PMI transmitted by the first user equipment, the beamforming and pairing power adjustment are performed to the transmission data on the Physical Downlink Shared Channel (PDSCH) distributed to the first user equipment in the first mode of the Long Term Evolution (LTE) transmission modes; the beamforming weights adjustment is performed to the second user equipment in the second mode so that the precoding matrix weights of the second user equipment are orthogonal with those of the first user equipment, and the power adjustment is performed to the second user equipment to satisfy the total power constraint of the paired first user equipment and second user equipment. The problem of pairing the user equipment in different MIMO modes could be solved with the method provided by the embodiments of the invention.