Timing extraction in multiplexed multichannel high speed fiber o

Details Timing extraction in multiplexed multichannel high speed fiber o Timing extraction in multiplexed multichannel high speed fiber o

1989-08-10

1991-09-17

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370108, H04J 304, H04J 306

Patent

active

050501674

ABSTRACT:
Recovery of the timing signal is obtained directly at the receiver of the time-division multiplexed transmission system in accordance with the present invention. At the transmitter, multiplexing (203) of plural return-to-zero format (RZ) channels (201-1-201-N) is delay controlled (202) so that the position of each pulse of each channel within each time slot is offset from the beginning or the end of the time slot by a predetermined fixed delay, the position of the data bits in pairs of adjacent time slots being mirror-imaged with respect to their common time point. The power density spectrum of the resultant signal has an "enchanced" discrete component at the clock frequency and a dip in the continuous spectrum. At the receiver a large amplitude phase-synchronized clock signal is derived from this discrete component in one single step by an injection-locking technique (704).

REFERENCES:
patent: 3727061 (1973-04-01), Dworkin
patent: 3931473 (1976-01-01), Ferris, Jr.
patent: 4967410 (1990-10-01), Takase et al.
"Digital PCM Bit Synchronizer and Detector, " A. E. Moghazi et al. IEEE Trans. Comm., Com-28, pp. 1197-1203, Aug. 1980.
"2 Gbit/s Timing Recovery Circuit Using Dielectric Resonator Filter," D. J. Millicker et al. Elect. Lett., 23, pp. 738-739, Jul. 1987.
"New Proposal for Multigigabit/s Clock Recovery IC Based on a Standard Silicon Bipolar Technology, " D. Wang et al. Electr. Lett., 23, pp. 454-456, Apr. 1987.
"New Method of Data Regeneration for Multigigabit/s Lightwave Systems," K. Runge et al. Digest, OFC'89 Paper #WN2, Houston, Tex. 1989.
"1.13-Gbit/s Lightwave Transmission System," K. Y. Maxham et al. J. Lightwave Techn., Lt-5, No. 10, pp. 1510-1517, Oct. 1987.
"Multigigabit Per Second Short Optical Pulse Transmitter Experiment," H. Izadpanah et al. Conf. Digest CLEO '88, Anaheim, Calif. pp. 128-129.
"Optical TDM For Very High Bit-Rate Transmission," R. S. Tucker et al. J. Lightwave Techn., LT-6, pp. 1737-1749, 1988.
"Injection Locking of Microwave Solid-State Oscillators," K. Kurokaw, Proc. IEEE, 61, pp. 1386-1410, Oct. 1973.
"Direct Timing Extraction in a Modified-Manchester Coded Picosecond Optical Pulse Fibre Optic Transmission System," H. Izadpanah, Electr. Lett., 24 pp. 1151-1152, Sep. 1988.

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