Patent ID: 7398098

Claim:
A radio base apparatus capable of communicating with a diversity terminal apparatus performing selective diversity reception, said diversity terminal apparatus having at least first and second antennas, always using said second antenna to transmit an up-link signal to said radio base apparatus, and measuring reception levels at said first antenna at a prescribed first timing and at said second antenna at a prescribed second timing of a down-link signal from said radio base apparatus to use an antenna with a higher reception level to receive a down-link signal from said radio base apparatus, said radio base apparatus comprising: signal processing means for receiving and transmitting a signal from/to each of said plurality of terminal apparatuses through adaptive array processing; and transmitting power control means for controlling transmitting power for a terminal apparatus of said plurality of terminal apparatuses which communicates with said radio base apparatus such that transmitting power at said second timing of the down-link signal is larger than transmitting power at said first timing of the down-link signal.