RADIO RECEIVER AND AUTOMATIC GAIN CONTROL METHOD

摘要

A received frame is branched to a common pilot signal gain control system (20A) and to an individual data signal gain control system (20B). The gain control system (20A) gain-controls the gain of a common pilot signal while the gain control system (20B) gain-controls the gain of a data signal. A signal processor (30) performs synchronization with a frame, outputs a gain control signal (g1) for making the gain of the common pilot signal constant to a common pilot signal gain control circuit (21a), and outputs a gain control signal (g2) for making the gain of the data signal constant to a data signal gain control circuit (21b). Since the gain is controlled to be constant, it is possible to prevent saturation of ADC (26a, 26b, 27a, 27b) and S/N deterioration.