| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a synchronization detecting device and synchronization detecting method capable of reducing erroneous detection of symbol timing synchronization caused by detection leakage of correlative peak, for improved detection precision. <P>SOLUTION: A symbol timing synchronization detecting circuit 14 calculates the correlation value 40 of a radio packet signal 26 that is received by a correlation calculation circuit 30. A peak detecting circuit 32 compares the correlation value 40 with a threshold value that is used, and a detection signal 44 is transmitted to a symbol synchronization process circuit 34 according to the correlation value equal to or higher than the threshold value. The threshold value of the peak detecting circuit 32 is so set that a threshold value used in a prescribed predicted period and the period other than that are different on and after first peak detection. A first peak is detected with the threshold value of strict condition in the period other than the prescribed predicted one, and the next peak detection timing is predicted according to the detection. The synchronization detection position is judged based on the fact that no correlative peak is present at the predicted timing, for outputting synchronization detection signal. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
