Timing reproducer and demodulator comprising this

A timing recovery device characterized by the provision of:

• adding means for adding together an in-phase component of a base band signal and a quadrature component of the base band signal and for outputting a signal after the addition as an added signal;
• subtracting means for subtracting the in-phase component of the base band signal and the quadrature component of the base band signal from each other and for outputting a signal after the subtraction as a subtracted signal;
• added value correlation calculating means for calculating the correlation between said added signal and a ½ symbol frequency component generated at the receiver side, and for outputting the calculated correlation value as an added correlation signal;
• subtracted value correlation calculating means for calculating the correlation between said subtracted signal and said ½ symbol frequency component, and for outputting the calculated correlation value as a subtracted correlation signal;
• vector selecting means for comparing the magnitude of said added correlation signal and the magnitude of said subtracted correlation signal, for selecting the correlation signal of the larger magnitude, and for outputting the selected correlation signal as a selected correlation signal;
• weighting means for weighting said selected correlation signal in accordance with the magnitude of the vector length indicated by said selected correlation signal, and for outputting said weighted selected correlation signal as a weighted correlation signal;
• weighted signal averaging means for averaging said weighted correlation signal and for outputting the average as a weighted average correlation signal;
• and
• timing phase difference calculating means for calculating a timing phase difference through utilization of the vector angle indicated by said averaged correlation signal.