Wireless transmission apparatus, wireless reception apparatus, wireless communication system and integrated circuit

A wireless reception apparatus that includes at least one reception antenna and that receives a spatially multiplexed signal from a wireless transmission apparatus, the wireless reception apparatus comprising:

• A memory having instructions stored thereon executed by a processor to perform:
• sharing a codebook describing a plurality of linear filters associated with each other with said wireless transmission apparatus, and
• extracting a first linear filter from said codebook, based on said association, and
• notifying the extracted first linear filter to said wireless transmission apparatus;
• wherein
• said first linear filter maximizes any one of a reception signal-to-noise power ratio, a reception signal-to-interference plus noise power ratio and a communication capacity of said wireless transmission apparatus.

An integrated circuit that is mounted on a wireless transmission apparatus including a plurality of transmission antennas and that makes said wireless transmission apparatus perform a plurality of functions, the integrated circuit makes said wireless transmission apparatus perform a series of functions, the integrated circuit comprising:

• A memory having instructions stored thereon executed by a processor to perform:
• a function of performing precoding on a data signal for each of a plurality of reception apparatuses and of spatially multiplexing and transmitting the signal after said precoding;
• a function of sharing, with each of said reception apparatuses, a codebook describing a plurality of linear filters associated with each other;
• and
• a function of performing, based on a first linear filter that is extracted from said codebook in each of said reception apparatuses based on said association and that is notified from each of said reception apparatuses, the precoding on each data signal for each of said reception apparatus;
• wherein
• said first linear filter maximizes any one of a reception signal-to-noise power ratio, a reception signal-to-interference plus noise power ratio and a communication capacity of each of said reception apparatuses.