| Abstract: | A smart MU-MIMO operation method in TD-LTE system is proposed,which combines the merits of both BF(Beamforming) and CL-MIMO(Closed Loop MIMO).Once obtaining the estimated channel information when receiving UL-SRS(Uplink Sounding Reference Signal) from UE,the eNB will quantify them as labels using pre-determined codebook in physical layer L1.Then L1 conveys those chosen labels to L2 in which scheduler will use those labels for MU scheduling.It will well solve the two problems of zero-forcing UEs pairing and the cross-layer resource allocation procedure between L1 and L2.And finally,L1 will generate the BF precoding matrix without heavy computation.This paper proposes a general framework for the system implementation with anticipated sub-optimal performance.To reach the objectives,new design criteria on codebook and quick algorithm for generation on precoding matrix are proposed. |
