MIMO transmission scheme using multiple antennas in a radio communication station

A radio transmitting station comprising:

• multiple transmitting antennas that transform electrical signals into radio waves and emit the radio waves;
• a processor that controls a beam direction of the radio waves to be emitted from the multiple transmitting antennas by giving precoding weights to the electrical signals to be supplied to the multiple transmitting antennas;
• and
• at least one power adjuster that adjusts power of an electrical signal that is to be supplied to at least a portion of the multiple transmitting antennas, such that differences between powers of the electrical signals to be supplied to the multiple transmitting antennas are reduced,
• wherein the processor gives the precoding weights to the electrical signals to be supplied to the multiple transmitting antennas using a precoding algorithm that is selected from precoding algorithms differing from one another, and
• wherein the power adjuster changes an amount of power adjustment according to the precoding algorithm used in the processor.