A comparison of coherent digital PPM with PCM

Robert A. Cryan; Rodney T. Unwin; Alistair J. Massarella; Martin J.N. Sibley; Ian Garrett

doi:10.1002/ett.4460030405

A comparison of coherent digital PPM with PCM

Robert A. Cryan, Rodney T. Unwin, Alistair J. Massarella, Martin J.N. Sibley, Ian Garrett

Research output: Contribution to journal › Article › peer-review

22 Citations (Scopus)

Abstract

Digital pulse position modulation (PPM) is a preferred modulation format for the ideal photon counting channel and optical intersateilite links. Here we examine its potential for the coherent optical fibre communications channel. We present a thorough performance and optimisation analysis. Comparisons, at a wavelength of 1.5 μm, are made with shot‐noise limited coherent PCM (homodyne and heterodyne ASK, FSK and PSK) over a range of fibre band‐widths and varying PPM word size. We conclude that for moderate to high fibre bandwidths homodyne digital PPM should achieve an improvement in sensitivity of typically 5 dB over homo‐dyne PSK PCM.

Original language	English
Pages (from-to)	331-340
Number of pages	10
Journal	European Transactions on Telecommunications
Volume	3
Issue number	4
DOIs	https://doi.org/10.1002/ett.4460030405
Publication status	Published - 1 Jul 1992

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title = "A comparison of coherent digital PPM with PCM",

abstract = "Digital pulse position modulation (PPM) is a preferred modulation format for the ideal photon counting channel and optical intersateilite links. Here we examine its potential for the coherent optical fibre communications channel. We present a thorough performance and optimisation analysis. Comparisons, at a wavelength of 1.5 μm, are made with shot‐noise limited coherent PCM (homodyne and heterodyne ASK, FSK and PSK) over a range of fibre band‐widths and varying PPM word size. We conclude that for moderate to high fibre bandwidths homodyne digital PPM should achieve an improvement in sensitivity of typically 5 dB over homo‐dyne PSK PCM.",

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AU - Cryan, Robert A.

AU - Unwin, Rodney T.

AU - Massarella, Alistair J.

AU - Sibley, Martin J.N.

AU - Garrett, Ian

PY - 1992/7/1

Y1 - 1992/7/1

N2 - Digital pulse position modulation (PPM) is a preferred modulation format for the ideal photon counting channel and optical intersateilite links. Here we examine its potential for the coherent optical fibre communications channel. We present a thorough performance and optimisation analysis. Comparisons, at a wavelength of 1.5 μm, are made with shot‐noise limited coherent PCM (homodyne and heterodyne ASK, FSK and PSK) over a range of fibre band‐widths and varying PPM word size. We conclude that for moderate to high fibre bandwidths homodyne digital PPM should achieve an improvement in sensitivity of typically 5 dB over homo‐dyne PSK PCM.

AB - Digital pulse position modulation (PPM) is a preferred modulation format for the ideal photon counting channel and optical intersateilite links. Here we examine its potential for the coherent optical fibre communications channel. We present a thorough performance and optimisation analysis. Comparisons, at a wavelength of 1.5 μm, are made with shot‐noise limited coherent PCM (homodyne and heterodyne ASK, FSK and PSK) over a range of fibre band‐widths and varying PPM word size. We conclude that for moderate to high fibre bandwidths homodyne digital PPM should achieve an improvement in sensitivity of typically 5 dB over homo‐dyne PSK PCM.

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JO - European Transactions on Telecommunications

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A comparison of coherent digital PPM with PCM

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