Antenna directivity control method and radio apparatus

摘要

A connection request signal issued from a terminal (PS 2 ) corresponding to a new call and received by an array antenna ( 2 ) is supplied to an adaptive array ( 14 ) and a parameter estimating unit ( 15 ). The parameter estimating unit ( 15 ) lowers a send power of a terminal (PS 1 ) corresponding to an existing call by a predetermined level when it is detected from an output of the adaptive array ( 14 ) and a signal supplied from the antenna ( 2 ) that the connection request signal is received via a C-channel.