VERFAHREN UND EINRICHTUNG ZUM UEBERTRAGEN UND EXTRAHIEREN EINES ZEITSIGNALS.

摘要

For use in a multi-carrier parallel data transmission system having the carrier frequencies of channels arranged at baud rate intervals there is provided a method and an arrangement for transmitting and extracting a timing signal. On a transmitting side, two pilot signals, whose frequency difference is an integral multiple of the baud rate, are inserted outside the signal band of said data transmission system and transmitted to a receiving side. On the receiving side, the frequency difference signal of said two pilot signals is taken out and is frequency-divided to extract a timing signal equal to the baud rate frequency. This system is capable of transmitting a timing signal without sacrificing any of the carriers within the band usable for data transmission.