| 摘要 |
PURPOSE: To reduce a time till received data establishes correct frame synchronization by allowing the received data to be quickly escaped from the synchronization with a pseudo pattern. CONSTITUTION: The system is provided with a synchronization pattern comparison section (a) detecting a frame synchronization pattern, a count section (b) whose operation is started at detection time t0 of a first pattern to count a time T for a prescribed period, a memory section (c) storing a position t1 of the frame synchronization pattern detected on the way of count, and a synchronization establishment discrimination section (d) detecting a synchronization pattern for a prescribed number of times for each prescribed time T to discriminate frame synchronization. When the synchronization pattern comparison section (a) recognizes pseudo synchronization because a synchronization detected at a time t1 at first from the received data cannot be detected at a time t0' after the prescribed period T, frame synchronization is established by using a time position t1 of the synchronization pattern of the memory section (c). |
