Wireless Communication System And Wireless Communication Method

An user equipment in a MIMO wireless communication system that comprises at least one base station having multiple transmitting antennas and at least one user equipment having at least one receiving antennas, wherein the base station is capable of accommodating plural user equipments by precoding based on a codebook, the user equipment comprises:

• a channel estimation unit for conducting a channel estimation based on a pilot signal transmitted from the base station, to obtain a channel information;
• a codeword determination unit for determining a first codeword that results in the maximum signal-noise-ratio, and at least one second codeword that results in the minimum signal-noise-ratio, based on the channel information;
• and
• a transmission unit for feedbacking the first codeword and the second codeword(s) to the base station.

A MIMO wireless communication system, which comprises at least one base station having plural transmitting antennas and at least one user equipment having at least one receiving antennas, the base station being capable of accommodating plural user equipments by precoding based on a codebook, wherein,

• each of the plural user equipments comprises:
• a channel estimation unit for conducting a channel estimation based on a pilot signal transmitted from the base station, to obtain a channel information;
• a codeword determination unit for determining a first codeword that results in the maximum signal-noise-ratio, and at least one second codeword that results in the minimum signal-noise-ratio, based on the channel information;
• and
• a transmission unit for feedbacking the first codeword and the second codeword(s) to the base station,
• the base station is configured to schedule the user equipments based on the first codeword and the second codeword so that a predetermined system performance metric is optimized.