Patent ID: 7912163
Filing Date: 2011-03-22
Classification: H04L,H04W,Y02D

Abstract:
1. A wireless receiving device for receiving a modulated signal to execute demodulation processing, comprising: mode setting unit for setting a synchronization acquisition mode or a synchronization tracking mode; signal converter for converting a received signal into a first digital signal having a first number of samples in said synchronization acquisition mode; synchronous position detection unit for detecting a synchronous position of said first digital signal which has been converted in said synchronization acquisition mode; storage unit for storing said detected synchronous position in said synchronization acquisition mode; demodulation processing unit for executing demodulation processing of said first digital signal based on said detected synchronous position in said synchronization acquisition mode; and error determination unit for determining whether said demodulated first digital signal has a reception error or not, wherein said mode setting unit sets said synchronization tracking mode in response to the determination that there exists no reception error made by said error determination unit, said signal converter converts said received signal into a second digital signal having a second number of samples less than said first number of samples in said synchronization tracking mode, said demodulation processing unit executes demodulation processing of said second digital signal based on the synchronous position stored in said storage unit in said synchronization tracking mode, said second number of samples is set such that from said received signal, at least a symbol point and points before and after said symbol point are included in sampling timing, and an interval between the symbol point and the points before and after said symbol point is equal to an interval between points sampled a number of times equal to said first number of samples.