A radio apparatus and base station apparatus that flexibly respond to an
increase or decrease in the number of users without being constrained by
the number of users. An A-DPCH signal processing section (106) generates
dedicated transmission signals corresponding in number to users
multiplexed based on the number of users for each sector input from a
control station apparatus and outputs the multiplexed signal to a
multiplexing section (105). An HSDPA signal processing section (107)
selects a transmission destination sector based on an instruction from a
base station control section, generates multiplexed transmission data and
outputs the multiplexed data to the multiplexing section (105). The
multiplexing section (105) code-multiplexes dedicated transmission
signals of A-DPCH and packet data in HSDPA communication for each sector
and outputs the multiplexed data to a radio transmission section (104).
The radio transmission section (104) transmits the multiplexed
transmission signal input from the multiplexing section (105) from an
antenna (101).