| 摘要 |
Input data symbols are written in a write buffer (120) then to a sync adder (200), which appends a pseudo randomly (PN) generated (800) sync bit to the MSB position of a four-symbol sync word data field to generate a sync word. Sync words might be randomized (900) and sent to a receiver (180) where synchronization is recovered (300) and de-randomized (900). Sync recovery involves the receiver (180) re-gerenating the same PN sequence that was generated at the transmitter (170). When the sync bit position is found, the data stream is assembled into fixed length sync words and written into the read buffer (150) at an address derived from the position of the sync bit in the PN sequence. Error rate measurement involving comparing a received PN sequence with a reconstructed PN sequence. |
