| 摘要 |
<p>A Multiple-User Multiple Input - Multiple Output (MU-MIMO) wireless communication system uses a set of multiple subcarriers arranged in plural subsets or Resource Blocks (RBs). Precoding of signals transmitted from a base station (BS) to user terminals (UE1, UE2, UE3,...) involves acquiring (30) channel state information (e.g. CSI) on the connection channel between the base station and user terminals in said plurality. Channel quality indicators (e.g. CQIs or explicit SINR estimates) are detected (18) with user terminals (UE1, UE2, UE3,...) for respective subsets of RBs to produce (20) user/RB pairs having associated channel quality indicators. The user/RB pairs are subjected to selection (22) as a function of the channel quality indicators associated therewith so that precoding is performed by acquiring channel state information (30) exclusively for the user/RB pairs surviving the selection as a function of the channel quality indicators and, possibly, other selection steps as a function of other parameters such as speed (14), maximum bit rate (16), direction of arrival or angular spread (26) in a multiple-stage selection process.</p> |
