| abstract |
The present invention relates to the field of communications, discloses a linear precoding method and device for multi-user (MU) multiple-input multiple-output (MIMO) systems that reduce calculation complexity, enhance system efficiency, and have high robustness for imperfect CSI by using linear precoding techniques. The solutions provided by the embodiments of the present invention determine a first matrix according to the channel information of the system, obtain an equivalent channel matrix according to the first matrix, decompose the equivalent channel matrix, calculates to obtain a second matrix, and obtain a precoding matrix according to the first matrix and the second matrix, such that after at least two simultaneous signals to be transmitted are processed using the precoding matrix, the power of the spatial streams of every user is in equilibrium. The solutions provided by the embodiments of the present invention are applicable to the use of linear precoding at base stations during signal transmissions on the uplink channels and downlink channels of MU MIMO systems. |