| 摘要 |
<p>PURPOSE:To identify the type of a frame and to prevent the deterioration in a frame using efficiency by changing and transmitting the quantity of shift for every parallel code string of a synchronizing code in one slot according to the type of the frame and detecting the quantity of the shift in a receiving side. CONSTITUTION:At the time of transmitting a reference burst of a frame reference such as an ordinary frame, a super frame, the code start point of a burst synchronizing code * in the plural parallel code strings P, Q corresponding to the number of modulated phases is shifted for every code string P, Q according to the various frame reference, the quantities t1, t2 of the shift are defined to be frame synchronizing information to transmit the various frame references. In a receiving station, the synchronizing code * is detected from a decoded signal for every parallel code string P, Q by a detector capable of detecting a code pattern corresponding to the modulated phase, thereby, the phase of a phase indeterminate removing circuit is set, the quantities t1, t2 of the shift for every synchronizing code string are detected by the time difference of a synchronizing code detecting signal to obtain the frame synchronizing information.</p> |
