| 摘要 |
<p>The present invention relates to the management of control information in a multi-user multi-input, multi-output system (1) with one base unit (2) and one or several user units (31, 32), where respective user unit sends an index representing a vector from a user codebook (311) belonging to the user unit (31). The base unit (2) co-schedules compatible user units (31) to simultaneously share one time-frequency recourse by selecting a precoding matrix from a transmitter codebook (21) based on the indices received from co-scheduled user units (31, 32), according to a predefined function. The base unit (2) transmits control information regarding selected precoding matrix to each co-scheduled user unit (31, 32). The predefined function is known to each user unit (31, 32) and the control information (23r, 23r') to each user unit (31, 32) only contains information on the index from every other user unit. Respective user unit (31, 32) regenerates the precoding matrix according to its own index, other user units indices and the predefined function.</p> |
