| 摘要 |
PURPOSE:To establish frame synchronization even when part of a frame header is destroyed by using plural frame headers and establishing the frame synchronization by detecting (n)-headers being faulty among the plural headers. CONSTITUTION:Plural (m) frame headers with different patterns are provided to a frame and when >=(1<=n<=m) headers are faulty, the frame synchronization is established. For example, a frame consists of frame headers 1-3 and a transmission data 4 and the pattern of the 3 frame headers 1-3 is different and when at least >=2 among the frame headers 1-3 are detected, the frame sychronization is established. Thus, even when part of the frame headers is destroyed due to noise or the like, the frame synchronization is correctly established and even when the same pattern as that of a frame header takes place in the transmission data, no malfunction takes place and sure frame synchronizatrion is implemented. |
