| 摘要 |
An antenna directivity control section 102 controls an antenna adaptively by control of an arrival direction detecting section 106 , and narrows down a area for transmitting data. DPCH transmission power control sections 111 - 1 to 111 -n perform transmission power control of a DPCH transmission signal based on a request signal for increase/decrease of the transmission power inputted from radio receivers 104 - 1 to 104 -n. Power judgement sections 112 - 1 to 112 -n determine how much the transmission power is increased/decreased from the transmission power to which the transmission power control is applied, and output a signal according to a quantity of increase/decrease of the transmission power to adaptive modulation control sections 113 - 1 to 113 -n. The adaptive modulation control sections 113 - 1 to 113 -n apply adaptive modulation control to packet data of a HS-DSCH, based on a signal inputted from the power judgement sections 112 - 1 to 112 -n. Thus, it is possible to prevent a reception signal from producing errors due to erroneous beam forming and adaptive modulation. |
