Setting the gain of a loop filter used for carrier synchronization in a receiver according to the type of quadrature modulation received

摘要

A reception device that receives a modulation signal being a result of digital modulation of a carrier is disclosed. The device includes:a demodulation section (11) that demodulates the modulation signal into a demodulation signal including an Icomponent and a Qcomponent;a numerically controlled oscillation section (37) that generates a signal of predetermined phase;a phase error detection section (32) that detects a phase error between a phase of a symbol of the demodulation signal and the predetermined phase of the signal generated by the numerically controlled oscillation section (37);a phase rotation section (33) that rotates the phase of the symbol of the demodulation signal in accordance with the phase error;a loop filter (36) that filters the phase error, and controls the numerically controlled oscillation section; anda gain control section (38) that controls a gain of the loop filter (36) based on a modulation technique of the modulation signal.