Patent ID: 8077806
Filing Date: 2011-12-13
Classification: H04L

Abstract:
1. A wireless reception device, comprising: an automatic frequency control unit which inputs a reception modulation signal that is frequency-converted to a baseband and is phase-modulated by information, and generates an automatic frequency control reference signal including a frequency deviation component of a carrier wave between transmission side and reception side that is contained in the reception modulation signal, the automatic frequency control unit having a frequency locking operation state and a steady state following the frequency locking operation; a modulation component removal unit which inputs the reception modulation signal, and generates a synchronization detection reference signal including the frequency deviation component by removing a phase-modulation component of the reception modulation signal from the reception modulation signal; and a match detection unit that detects a mismatch between the synchronization detection reference signal and the automatic frequency control reference signal, wherein, when the match detection unit detects the mismatch, the automatic frequency control unit is controlled to the frequency locking operation state.