DIGITAL RADIO RECEIVER

摘要

A digital radio receiver for reproducing carrier quickly and capturing a desired signal at high speed, comprising a carrier reproduction phase error detecting circuit (6) for detecting the phase error voltage based on the demodulation output of a wave to be modulated between predetermined sections in a header section, a number-of-peak calculation circuit (92) for calculating the error frequency between a desired receiving frequency and the frequency of a reproduced carrier, and a differential coefficient calculation circuit (94) for calculating the polarity of the error frequency. The error frequency having a calculated polarity is converted through a step frequency control circuit (96) into a step frequency width for an automatic frequency controlling and a desired signal can be captured at high speed by frequency-scanning the reproduction carrier frequency until frame synchronization is established at a converted step frequency width after the frame synchronization is detected thereby reproducing the carrier quickly.