Patent ID: 8219039
Filing Date: 2012-07-10
Classification: H04B

Abstract:
1. A radio communication device which adaptively controls directivity of a transmission radio signal by use of a plurality of element antennas on the basis of a received radio signal received from a counterpart radio communication device that is a communication target radio communication device, the transmission radio signal being to be transmitted to the counterpart radio communication device, the radio communication device comprising: a transmission controller configured to process the transmission radio signal according to a first control method for adaptively controlling the directivity of the transmission radio signal; a propagation path state detector configured to detect a fluctuation state of a propagation path to the counterpart radio communication device on the basis of the received radio signal; and a judgment unit configured to judge whether or not to change the directivity of the transmission radio signal on the basis of the fluctuation state of the propagation path detected by the propagation path state detector, wherein when the judgment unit judges to change the directivity of the transmission radio signal, the transmission controller switches to a second control method that is different from the first control method, and then processes the transmission radio signal according to the second control method.