Wireless communication apparatus and wireless communication method

A wireless communication apparatus having a plurality of antennas comprising:

• a reception channel coefficient calculation unit for calculating a reception channel coefficient of each of the plurality of antennas;
• a transmission channel coefficient calculation unit for calculating a transmission channel coefficient of each of the plurality of antennas by extrapolation, based on a variation of the reception channel coefficient calculated by the reception channel coefficient calculation unit;
• an absolute value calculation unit for calculating an absolute value of the transmission channel coefficient calculated by the transmission channel coefficient calculation unit;
• a threshold calculation unit for calculating a threshold based on the reception channel coefficient calculated by the reception channel coefficient calculation unit;
• a comparison unit for comparing the absolute value calculated by the absolute value calculation unit and the threshold calculated by the threshold calculation unit;
• a difference value calculation unit for calculating a difference value between the absolute value calculated by the absolute value calculation unit and the threshold calculated by the threshold calculation unit;
• and
• a correction unit, when the absolute value is greater than the threshold as a result of a comparison by the comparison unit, for correcting the transmission channel coefficient calculated by the transmission channel coefficient calculation unit based on the difference value calculated by the difference value calculation unit.

A wireless communication method for controlling wireless communication between a wireless communication apparatus having a plurality of antennas and a counterpart wireless communication apparatus, comprising:

• a reception channel coefficient calculation step for calculating a reception channel coefficient of each of the plurality of antennas;
• a transmission channel coefficient calculation step for calculating a transmission channel coefficient of each of the plurality of antennas by extrapolation, based on a variation of the reception channel coefficient calculated at the reception channel coefficient calculation step;
• an absolute value calculation step for calculating an absolute value of the transmission channel coefficient calculated at the transmission channel coefficient calculation step;
• a threshold calculation step for calculating a threshold based on the reception channel coefficient calculated at the reception channel coefficient calculation step;
• and
• a correction step, when the absolute value is greater than the threshold, for correcting the transmission channel coefficient, calculated at the transmission channel coefficient calculation step, so as to match the absolute value to the threshold.

A wireless communication method for controlling wireless communication between a wireless communication apparatus having a plurality of antennas and a counterpart wireless communication apparatus, comprising:

• a reception channel coefficient calculation step for calculating a reception channel coefficient of each of the plurality of antennas;
• a transmission channel coefficient calculation step for calculating a transmission channel coefficient of each of the plurality of antennas by extrapolation, based on a variation of the reception channel coefficient calculated at the reception channel coefficient calculation step;
• an absolute value calculation step for calculating an absolute value of the transmission channel coefficient calculated at the transmission channel coefficient calculation step;
• a threshold calculation step for calculating a threshold based on the reception channel coefficient calculated at the reception channel coefficient calculation step;
• a difference value calculation step for calculating a difference value between the absolute value calculated at the absolute value calculation step and the threshold calculated at the threshold calculation step;
• and
• a correction step, when the absolute value is greater than the threshold, for correcting the transmission channel coefficient calculated at the transmission channel coefficient calculation step, based on the difference value calculated at the difference value calculation step.