Method for realizing precoding and method for generating precoding matrices

The invention provides a method for realizing precoding and a method for generating precoding matrices set. Precoding matrix sets are set at a transmitting terminal and a receiving terminal; according to the signal quality of an measured antenna at the transmitting terminal, the receiving terminal selects the precoding matrix, and the selected precoding matrix is indexed and informed to the transmitting terminal; the transmitting terminal utilizes the precoding matrix corresponding to the precoding matrix index to pre-code the sent signal. The precoding matrix in the precoding matrix set has the function of selecting the antenna, so that the antenna with good antenna signal quality can be selected for transmitting according to the antenna signal quality, and the antenna with poor antenna signal quality can be closed, thus improving the efficiency for sending signals by multiple antennae, and saving the resources.