Method and arrangement for transmitting and extracting a timing

Details Method and arrangement for transmitting and extracting a timing Method and arrangement for transmitting and extracting a timing

1986-05-20

1988-05-31

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 98, 375113, H04J 102

Patent

active

047486163

ABSTRACT:
A method for transmitting and extracting a timing signal for use in a multi-carrier parallel data transmission system having the carrier frequencies of channels arranged at baud rate intervals. 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. By this use of two pilot signals, it then becomes possible to transmit and extract a timing signal without sacrificing any of the valuable carriers contained within the data transmission band.

REFERENCES:
patent: 3355553 (1967-11-01), Miyagi
patent: 3702379 (1972-11-01), Peterson et al.
patent: 4300229 (1981-11-01), Hirosaki
patent: 4438511 (1984-03-01), Baran
patent: 4618996 (1986-10-01), Rafal et al.

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