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4 November 1993 Investigation of the synchronization requirements for optical fiber PPM
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Proceedings Volume 1974, Transport Technologies for Broadband Optical Access Networks; (1993) https://doi.org/10.1117/12.161500
Event: Video Communications and Fiber Optic Networks, 1993, Berlin, Germany
Abstract
Self synchronization of the optical fiber n-ary PPM format entails acquiring the slot, frame frequency, and frame phase information directly from the PPM stream. Processing the PPM power spectral density can result in extracting the slot and frame frequency leaving an nth degree frame phase ambiguity to be resolved. We identify two classes of naturally occurring PPM sequences and present a novel technique for acquiring the frame phase directly from the incoming data stream. The technique is superior to previous methods since it does not involve added code redundancy, loss in sensitivity or bit rate. The frame phase synchronizers are shown to be upgradable and thus capable of coping with the required PPM word size. Original theoretical and practical results are reported for the synchronizers. Tracking the first two additional sequences is demonstrated and shown to offer 10.4 dB improvement in the discrete frame spectral component joined with 8.4 X 10-3 rad2 reduction in the timing variance.
© (1993) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jaafar M. H. Elmirghani, Robert A. Cryan, and F. M. Clayton "Investigation of the synchronization requirements for optical fiber PPM", Proc. SPIE 1974, Transport Technologies for Broadband Optical Access Networks, (4 November 1993); https://doi.org/10.1117/12.161500
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