GENERATING PRECODERS FOR USE IN OPTIMISING TRANSMISSION CAPACITY BETWEEN AN ENODEB AND UE IN A DL MU-MIMO COMMUNICATIONS SYSTEM

摘要

This method of generating precoders is used in optimising transmission capacity between an eNodeB and UEs in a DL MU-MIMO communication system. The method includes the steps of computing correlation values between pairs of precoding matrices (PMs) of the reported precoding matrix indicators (PMIs) (step 40), selecting a PM pair having a minimum correlation value (step 42). If the minimum correlation value is less than a lower threshold T_min, the method uses a PM corresponding to the received PMI (step 44). If the minimum correlation value is greater than T_min and less than an upper threshold T_max, the method includes the steps of computing correlation values of the reported PMI and Channel Matrices (CMs) from a fixed codebook of representative CMs (step 48), selecting a CM pair having a maximum correlation value (step 52), and computing precoders from the selected CM pair (step 54).