Radio communication base station apparatus and radio communication method

摘要

A plurality of search codes generated by a first search code generator and second search code generator are switched by a selector as appropriate, distributed in predetermined positions of control channel signals and transmitted. Transmitting control channel signals with search codes distributed in different time zones can suppress peak power of the transmission amplifier when transmitting search codes. Moreover, this prevents the transmission power of the search code part from extremely increasing compared to the transmission power of the data part of control channel signals, which allows the system to be designed within the range of the capacity of the transmission amplifier.