METHOD OF TRANSMITTING AND RECEIVING A SIGNAL FOR A MULTI-USER MIMO SYSTEM AND CORRESPONDING DEVICES

摘要

The present invention relates to a method of simultaneously transmitting K data streams allocated respectively to K different users, implemented by a transmitter intended for a MIMO system with NT transmission antennas and NR reception antennas associated with K receivers associated respectively with a user. The method comprises at least per data stream: a linear pre-coding with an initial transmission vector Tk so as to generate an intermediate vector of size NT. and a calculation of the largest eigenvalue of the expression; ? with Hk the matrix of the propagation channel for stream k, RSK, the covariance matrix of the emitted data, Rnk the covariance matrix of the noise on reception for user k, so as to deduce therefrom the initial optimal reception vector Dk of size N Rk which corresponds to the conjugate transpose of the eigenvector associated with the largest eigenvalue, and comprises: the addition of the K intermediate vectors of size NT, before feeding the NT antennas and the transmission of the K reception vectors Dk to the K receivers. The determination of the transmission and reception vectors may be performed iteratively.