LINK ADAPTION FOR WIRELESS MIMO TRANSMISSION SCHEMES

摘要

MIMO transmission methods are applied to communication systems in which a transmitter has more than one transmit antenna and a receiver has more than one receive antenna. Information to be transmitted is divided into a plurality of subsignals according to the number of used transmit antennas and each subsignal is processed separately before it is emitted by the respective transmit antenna. In the receiver the different receive signals are processed thus that subsignals are detected and decoded and the contribution of each detected and decoded subsignal is substracted from the receive signals and whereby a feedback channel from receiver to transmitter is used to send control information to the transmitter depending on the receive situation. In order to optimize the usage of the MIMO channel, the invention proposes the determination in the receiver of the link quality of each subsignal and the transmission of link quality information of each subsignal to the transmitter via the feedback channel so that in the transmitter properties of the subsignals can be controlled according to this link quality information.