PPM phase bearing-events for direct frame phase extraction

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PPM phase bearing-events for direct frame phase extraction

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© The Institution of Electrical Engineers
Published

A novel technique for extracting the optical fibre PPM frame phase is devised, implemented and theoretically characterised. The method is shown to combine design simplicity with performance adaptability for various PPM word sizes and is thus considerably more suited than previously suggested methods. Use is made of a class of naturally occurring PPM sequences that are identified and termed Min sequences. Original theoretical and practical results are reported that demonstrate the technique and its use in a self-synchronised PPM system.

Inspec keywords: optical links; pulse position modulation; encoding; synchronisation

Other keywords: performance adaptability; minimum length sequence; Min synchroniser; timing performance; design simplicity; direct frame phase extraction; optical fibre PPM frame phase; PPM synchronisation; PPM phase bearing-events; self-synchronised PPM system; encoding

Subjects: Optical communication; Codes

References

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      • J. Elmirghani , R. Cryan , M. Clayton . Spectral characterisation and frame synchronisation of optical fibre digital PPM. Electron. Lett. , 16 , 1482 - 1483
    2. 2)
      • G.L. Lui , H.H. Tan . On joint symbol and frame synchronization for direct-detection optical communication systems. IEEE Trans. , 24 , 250 - 255
    3. 3)
      • R.A. Cryan , R.T. Unwin , A.J. Massarella , M.J.N. Sibley , I. Garrett . A comparison of coherent PPM with PCM. European Trans. Telecom , 4 , 331 - 340
    4. 4)
      • J.J. O'Reilly , W. Yichao . Line code design for digital pulseposition modulation. IEE Proc. F , 6 , 441 - 446
    5. 5)
      • J.M.H. Elmirghani , R.A. Cryan , F.M. Clayton . Slot and frame synchronisation in optical fibre PPM systems with dispersed pulse shapes. J. Opt. Commun.
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