Method and apparatus for generating pre-coding matrix codebook

An apparatus for generating pre-coding matrix codebook, comprising:

• a universal set of first pre-coding matrixes acquiring unit configured to acquire a universal set of pre-coding matrixes in a first format;
• a universal set of second pre-coding matrixes acquiring unit configured to acquire a universal set of pre-coding matrixes in a second format;
• a first pre-coding matrix selecting unit configured to select a first predetermined number of pre-coding matrixes in the first format from the universal set of pre-coding matrixes in the first format;
• and
• a second pre-coding matrix selecting unit configured to select a second predetermined number of pre-coding matrixes in the second format from the universal set of pre-coding matrixes in the second format, according to the selected first predetermined number of pre-coding matrixes in the first format;
• wherein the second pre-coding matrix selecting unit comprises:
• a combined set of pre-coding matrixes generating sub-unit configured to merge the selected first predetermined number of pre-coding matrixes in the first format with the universal set of pre-coding matrixes in the second format, so as to form a combined set of pre-coding matrixes;
• a channel matrixes set acquiring sub-unit configured to form a set of channel matrixes of a communication system to which the pre-coding matrixes are applied, and each of the channel matrixes is corresponding to one channel example;
• a performance parameter matrix generating sub-unit configured to form a performance parameter matrix according to the combined set of pre-coding matrixes and the set of channel matrixes, each row of the performance parameter matrix represents performance parameter values related to the same pre-coding matrix, and each column represents performance parameter values related to the same channel matrix;
• and
• a pre-coding matrixes in second format selecting sub-unit configured to select the second predetermined number of pre-coding matrixes in the second format making a maximum contribution to the performance of the communication system, by using the performance parameter matrix and according to contributions to the performance of the communication system made by the respective pre-coding matrixes in the second format,
• wherein the universal set of first pre-coding matrixes acquiring unit, the universal set of second pre-coding matrixes acquiring unit, the first pre-coding matrix selecting unit, and the second pre-coding matrix selecting unit comprise hardware.