| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a synchronization detection circuit capable of correctly detecting synchronization from a received signal. <P>SOLUTION: The synchronization detection circuit includes: a correlation detection means for detecting a correlation between a received signal and comparison object data and providing the detected result as a correlation value; a window setting means for setting a window for sharing a prescribed period in matching with timing when the correlation between the received signal and the comparison object data is detected; a means for detecting a peak at which the correlation value is a prescribed value or over for the window period and carrying out a peak detection count for counting the number of accumulated peaks to provide an output of the number of peak detection times a; a vanished peak count means for detecting a vanished peak whose correlation value is not a prescribed value or over for the window period and counting the consecutive number of vanished peak times to provide an output of the number of vanished peak times b; and a detection / vanish comparison means for outputting synchronization timing when the number of peak detection times a is greater than a prescribed number of times a<SB>0</SB>and the number of vanished peak times b is greater than a prescribed number of time b<SB>0</SB>. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
