SELECTIVE CODEWORD-TO-LAYER MAPPING FOR MIMO TRANSMISSIONS

摘要

A method in a network node (2) of a cellular communications system for providing MIMO transmissions to a communication device (1) in the cellular communications system is disclosed. The MIMO transmissions use P code words mapped onto Q MIMO layers, where P > 2 and Q > P. The method comprises mapping (110) the code words for transmission to the communication device onto the MIMO layers according to a selected mapping scheme that has been selected among a plurality of available mapping schemes available for use for MIMO transmission of P code words over Q MIMO layers in the cellular communications system. A corresponding method for the communication device (1) is also disclosed.