Patent ID: 8345641

Claim:
A transmitting station in a radio system, comprising: a plurality of antennas; a memory to store information of a plurality of users; a first modulation section adaptively to modulate the user information output from the memory; a time-division conversion section to perform time-division of the user information output from the memory; a second modulation section adaptively to modulate each time-divided output; a plurality of radio signal generation sections to supply outputs of the first modulation section and the second modulation section to the plurality of antennas, correspondingly; a reception section to obtain reception quality information estimated from a pilot channel among information fed back from the plurality of users; and based on the reception quality information obtained in the reception section, a scheduler to determine a transmission system for the plurality of antennas, wherein, the scheduler validates the output of the first modulation section when performing a beamforming transmission, and validates the output of the second modulation section when performing Multi Input Multi Output (MIMO) multiplexing transmission.