Patent ID: 7266356
Filing Date: 2007-09-04
Classification: H04B

Abstract:
1. A mobile communication terminal apparatus configured to communicate with a transmitting station together with other terminal apparatuses, comprising: an antenna unit configured to select at least one of a plurality of antenna radiation characteristics different from one another, to receive a signal transmitted from the transmitting station according to the selected antenna radiation characteristics, and to generate a first signal; a wave detector configured to detect the first signal and to output a detection signal; a receiver configured to receive a signal which is transmitted from the other terminal apparatuses and represents the detection signal, and to generate a reference signal; an operator configured to determine a correlation value between the reference signal and the detection signal of the selected antenna radiation characteristic at the time of selecting the antenna radiation characteristic; a determination device configured to determine first antenna radiation characteristics of the other terminal apparatuses and second antenna radiation characteristics to be set at the antenna unit, based on the correlation value; a first transmitter configured to transmit a designation signal, for designating the first antenna radiation characteristics, to the other terminal apparatuses; a controller configured to control the antenna unit and to obtain the second antenna radiation characteristics; and a second transmitter configured to transmit the detection signal to the other terminal apparatuses, when the antenna unit has the second antenna radiation characteristics.