Wireless communication device, transmission power control method, and communication quality transmission method

A wireless communication device equipped with a plurality of antennas and configured to perform parallel communication of data, comprising:

• a communication quality calculator configured to calculate, based on a pilot signal included in the data received thereby, an antenna communication quality of each of a plurality of transmitting antennas of a transmitting-side wireless communication device that has transmitted the data;
• and
• a communication quality transmitter configured to transmit, to the transmitting-side wireless communication device, information about the antenna communication qualities calculated by the communication quality calculator.

A transmission power control method for a wireless communication device equipped with a plurality of antennas and configured to perform parallel communication of data, comprising:

• receiving information about antenna communication quality of each of said plurality of antennas from a receiving-side wireless communication device that has received the data;
• and
• controlling transmission power of each of said plurality of antennas, in accordance with the received antenna communication qualities.