COMMUNICATION TERMINAL APPARATUS AND RADIO COMMUNICATION METHOD

摘要

Calculation circuit 201 calculates the difference between the channel estimated value of a known reference signal sent from antenna A of the base station and the channel estimated value of a communication channel signal sent from the antenna of the base station, and the difference between the channel estimated value of a known reference signal sent from antenna B of the base station and the channel estimated value of the communication channel signal sent from antenna of the base station. These differences of channel estimated values are sent to comparison circuit 202 and compared there. This comparison result is sent to determination circuit 203. Determination circuit 203 performs threshold determination on the comparison result. The antenna that sent the communication channel signal is estimated by this threshold determination. Weighting calculation circuit 204 finds weighting factors based on the comparison result and determination result.