| 摘要 |
A base station transmitter for a CDMA system which can quickly reflect an amplitude controlling signal from a mobile station in transmission power control of the base station. The transmitter has a plurality of channel signal processing units which are provided for each communication channel and each of which converts an amplitude signal and a transmission signal into a serial signal. The transmission signal represents information to be transmitted and the amplitude signal is a signal for directing whether an amplitude of the transmission signal is increased or decreased. In the serial signal, one or more dummy bits are inserted between the transmission signal and the amplitude signal. The serial signal is then separated into the transmission signal and the amplitude signal. Each of the separated transmission signals is spread modulated with a corresponding spread code, and the spread modulated signals are combined into a combined spread signal on the basis of respective amplitude signals.
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