RADIO RECEPTION APPARATUS; SYMBOL TIMING CONTROL METHOD AND SYMBOL TIMING CONTROL PROGRAM

摘要

In a radio reception apparatus, a quadrature detector (4) provides its digital output signal to a band-limiting filter (6) after lowering a sampling frequency by a sampling frequency converter (15). Based on a correlation value obtained from an output of the band-limiting filter (6) by a symbol timing detecting circuit (17), a symbol timing deviation detecting circuit (18) detects a magnitude and a direction of a deviation of the timing of sampling in the sampling frequency converter (15), and controls timing of the sampling in the sampling frequency converter (15). Thereby, a symbol point of the correct timing is extracted.