| 摘要 |
<p>PURPOSE:To prevent an erroneous vector from being detected by performing decision by using not only the present state of a correlation value in each detecting area, but the time fluctuation value of the correlation value when reliability for a vector in each detecting area is decided. CONSTITUTION:The minimum value, the mean value, and the maximum value of the correlation value are found at a correlation value detecting part 3. A time differential value or a differential value after averaging the correlation value is found at a time fluctuation detecting part 4 for correlation value. A reliability decision circuit means 5 for vector decides the reliability for each area from the correlation value inputted from the correlation value detecting part 3 and the time fluctuation value of the correlation value inputted from the time fluctuation detecting part 4 for correlation value. The decision of the reliability for the vector in each area is performed by using not only the state of the correlation value in each area, but the time fluctuation value of the correlation value. Therefore, the decision for the absolute value of the correlation value can be supplemented even when the value at a certain point is fluctuated by a noise, which disturbs accurate decision for reliability. In such a way, erroneous detection can be automatically interrupted, which prevents the erroneous vector detected.</p> |
