| 摘要 |
PURPOSE:To decrease mis-detection rate of a unique word by reducing the possibility of setting an aperture block to an erroneous position. CONSTITUTION:An aperture block detector 20 setting an aperture block is provided with a 1st detection circuit 21 detecting the locking to a synchronization state, a 2nd detection circuit 22 detecting a BTR part of a packet, and an aperture block discrimination device 23 setting an aperture block based on the output of the detection circuit. Thus, it is prevented that the aperture block is set to a wrong position due to noise having a tentatively high level and the unique word is mis-detected. |
