| 摘要 |
PROBLEM TO BE SOLVED: To attain the gain control of a CDMA receiver by receiving a wide band level signal from the wide band stage of a receiver by a first port, receiving a narrow band power level signal from the narrow band stage of the receiver by a second port, connecting the wide band and narrow band power level signals by a connector, and generating a gain control signal to an input amplifier. SOLUTION: A reception input signal is demodulated by a demodulator 13, digitized by a standardizing and analog/digital converting circuit 14, CDMA- modulated or narrow band processed by a CDMA de-spread circuit 15, and processed for error correction decoding and source decoding by a narrow band processor 16. A gain control circuit 19 receives a first input from a stage in which a signal is a wide band CDMA signal and a second input from a stage in which a signal is a narrow band signal, generates a control signal based on those inputs, supplies it to a gain amplifier 12, and controls the gain. |
