Patent ID: 7209713
Filing Date: 2007-04-24
Classification: H04B,H04W

Abstract:
1. A radio apparatus, including: a receiver which receives signals from a predetermined terminal apparatus; a received response characteristics computing unit which calculates, from the signals received by said receiver, a received response characteristic for the terminal apparatus; a transmission weight factor computing unit which computes, from the signals received by said receiver, a candidate of transmission weight factor for the terminal apparatus; a predicted power computing unit which computes, from the candidate of transmission weight factor and the received response characteristic, a predicted receiving power value in the terminal apparatus; a storage which stores the predicted receiving power value computed by said predicted power computing unit; a setting unit which updates and sets the transmission weight factor to the candidate of transmission weight factor computed by said transmission weight factor computing unit if a difference between a predicted receiving power value in the past stored in said storage and the predicted receiving power value computed by said predicted power computing unit is less than a predetermined threshold value and which sets without updating the transmission weight factor if the difference thereof is greater than or equal to the predetermined threshold value; and a transmitter which transmits signals to the terminal apparatus based on the transmission weight factor set by said setting unit.