Design implications of high-speed digital PPM

Martin J. N. Sibley

doi:10.1117/12.161341

1 November 1993 Design implications of high-speed digital PPM

Martin J. N. Sibley

Proceedings Volume 2024, Multigigabit Fiber Communication Systems; (1993) https://doi.org/10.1117/12.161341
Event: SPIE's 1993 International Symposium on Optics, Imaging, and Instrumentation, 1993, San Diego, CA, United States

Abstract

Work in the area of digital pulse position modulation (digital PPM) has shown that this type of modulation can yield sensitivities that are typically 4 - 5 dB better than an equivalent PCM system. Recent experimental work has shown that the receiver in a digital PPM system does not need to have a wide bandwidth. Instead, the bandwidth can be very low so that the receiver is effectively impulsed by the digital PPM signal. The advent of very high speed Si digital ICs, and fast lasers, means that digital PPM can now be used to code gigabit PCM signals. This paper presents original theoretical results for a digital PPM system coding 1 Gbit/s PCM signals into 8 Gbit/s digital PPM signals. The paper also addresses the difficulties that the system designer is likely to encounter, and discusses some possible solutions.

Citation Download Citation

Martin J. N. Sibley "Design implications of high-speed digital PPM", Proc. SPIE 2024, Multigigabit Fiber Communication Systems, (1 November 1993); https://doi.org/10.1117/12.161341

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