RADIO COMMUNICATION METHOD AND RADIO COMMUNICATION EQUIPMENT

摘要

PROBLEM TO BE SOLVED: To perform transmission so as to reduce or to eliminate interference signals to communication partners except a desired communication partner by appropriately determining transmission weight when a plurality of communication partners exist. SOLUTION: When the communication partner and data to be transmitted are determined, a channel information acquisition circuit 108 transmits a channel response matrix of the communication partner to an orthogonal space operation circuit 106 and an interference space operation circuit 107. The interference space operation circuit 107 calculates a group of interference space base vectors from the channel response matrix and outputs the group of interference space base vectors to the orthogonal space operation circuit 106. The orthogonal space operation circuit 106 calculates an orthogonal space channel response matrix from the channel response matrix and the group of interference space base vectors and outputs the group of interference space vectors to a transmission weight operation circuit 105. The transmission weight in each antenna of each signal system to each communication partner is calculated by the transmission weight operation circuit 105. Thus, the interference signals to the communication partners except the desired communication partner are reduced. COPYRIGHT: (C)2007,JPO&INPIT