This paper focuses on the design of maximum ratio transmission (MRT) precoding for multi-user multiple-input\nmultiple-output (MU-MIMO) downlink transmission. Exiting block diagonalization (BD) precoding studies on MUMIMO\nsystems have the high complexity, because the transmitter precoding matrices constructed by singular value\ndecomposition (SVD) are successively calculated twice. The MRT scheme construct precoding vectors aimed at each\nreceived antennas, respectively, so the signals of every antenna are independent. More spatial diversity gain can be\nobtained compared with BD precoding when MRT precoding and maximum ratio combining are employed.\nSimulations show that the proposed algorithm has many gains over the conventional BD precoding in various\nMU-MIMO systems.
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