| 摘要 |
In a cellular system which is based on the TDMA system performing multi-slot communications, a DSP and a controller detect the received signal strength in each of a plurality of time slots received by an RF input section and, in case the received signal strength is abnormal, assign a weight to the received signal strength which is lighter than that assigned to a normal value thus calculating a received signal average strength in each time slot. In case each of these received signal average strength is abnormal, the DSP and the controller assign a weight to the received signal strength which is lighter than that assigned to a normal value to calculate the average value of a plurality of received signal average strengths in a frame. A gain control signal which is based on the average multi-slot received strength is fed back to an automatic gain control circuit to perform automatic gain control for setting the received signal strength to a predetermined value. This makes it possible to receive signals in a plurality of time slots in a frame by way of a same gain setting in a stable fashion.
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