| 摘要 |
A transmission device and a method thereof are provided to remove interference between user terminals through less operation quantity and obtain diversity gain. A subset matrix setting unit(102) sets up a subset matrix which is a channel matrix about a plurality of antennas of one or more user terminals among a plurality of user terminals by using channel matrices fed back from a plurality of user terminals. A beam forming matrix generating unit(108) produces beam forming matrix consisting of weight vectors corresponding to a plurality of antennas of a user terminal by performing the prescribed operation by using the set up subset matrix. A beam forming processing unit(110) produces transmission signals after the beam forming by performing a beam forming processing according to the generated beam forming matrix about data which is transmitted. Antennas(112) transmit the transmission signal after the beam forming to a plurality of user terminals. The subset matrix setting unit sets up the subset matrix about one antenna of a user terminal and the antenna of the other user terminal which is not the antenna of the user terminal about each antenna of one or more user terminals. |
