Method for transmitting symbols encoded in a hybrid MIMO transceiver scheme, transmitter,receiver, and MIMO system

摘要

The invention relates to wireless communication, and more particularly to MIMO systems. In such a MIMO system (1), a method for transmitting a plurality of encoded symbols (s 1 to s 4 ) from a plurality of transmitter antennas (T 1 to T 4 ) at a transmitter end to a plurality of receiver antennas (R 1 , R 2 ) at a receiver end is provided. The symbols (s 1 to s 4 ) are encoded in a hybrid MIMO transceiver scheme which can be expressed using an effective MIMO channel matrix (H hyb ). The method comprises the step of: allocating the encoded symbols (s 1 to s 4 ) to the transmitter antennas (T 1 to T 4 ) based on information provided from the receiver end to the transmitter end in a feed-back loop. An allocation which maximizes the instantaneous capacity of the effective MIMO channel matrix (H hyb ) is chosen based on information about the instantaneous channel realization. By selecting the best transmitter antennas (T 1 to T 4 ) using this criterion, the optimal balance between the diversity gain and the spatial multiplexing gain of the hybrid MIMO transceiver scheme can be obtained.