Patent ID: 7773949

Claim:
A multi-transmission/reception antenna device in a multi-user and multi-cell environment that, for each cell, includes a plurality of first units each having a predetermined antenna, and a second unit in wireless communication with the plurality of first units, wherein the second unit includes: an estimation unit that estimates channel information on signals from the individual first units and estimates information of noise and interference signals from adjacent cells; a calculation unit that calculates the sum of transfer rates for each user group having at least one first unit using the information estimated by the estimation unit; a determination unit that determines one user group by comparing the sum of the transfer rates of each user group calculated by the calculation unit; and a feedback unit that feedbacks information on the user group determined by the determination unit to the first units of a corresponding cell, and wherein the estimation unit estimates the channel information from prescribed pilot signals received from the first units of the corresponding cell, calculates the noise and interference signals from adjacent cells by subtracting the estimated channel information from an arbitrarily received signal, and estimates a correlation matrix of the noise and interference signals by correlating them for a predetermined time.