| 摘要 |
PROBLEM TO BE SOLVED: To reduce a circuit scale and an operation processing quantity by narrowing the required window width and reducing the number of correlation units. SOLUTION: A deviation quantity determining means 108 detects deviation quantity and deviation direction between a frequency center value which is set at present and synchronizing timing when a maximum correlation value is obtained by comparing correlation values from respective correlation units 1051 to 1058, and outputs a window position change signal to a window-moving means 107. The window moving means 107 changes the frequency center value of window width, based on the window position change signal from the deviation quantity determining means 108. When correlation value maximum timing moves from the center frequency due to AFC error, since the position of the window itself moves correspondingly, correlation value maximum timing will not deviate from the window, even if window width is narrowed. |
