Coding for Optical Channels by Ivan Djordjevic

By Ivan Djordjevic

Coding for Optical Channels

Ivan Djordjevic

William Ryan

Bane Vasic

In order to evolve to the ever-increasing calls for for high-speed transmission and distance-independent connectivity, today’s community operators are imposing a hundred Gb/s in step with dense wavelength department multiplexing (DWDM) channel. At these info premiums, the functionality of fiber-optic communique structures is degraded considerably because of intra- and inter-channel fiber nonlinearities, polarization-mode dispersion (PMD), and chromatic dispersion. to be able to care for those channel impairments, novel complex strategies in modulation, detection, coding and sign processing are wanted.

This groundbreaking booklet represents a coherent and finished advent to the basics of optical communications, electronic sign processing (DSP), and coding for optical channels. This book:

  • Is the 1st to combine the basics of coding idea and DSP with the basics of optical communication;
  • Provides distinctive assurance of joint coding and modulation for optical communications;
  • Presents faster equalization for joint iterative channel equalization and smooth deciphering on optical channels;
  • Provides in-depth assurance of codes on graphs, together with LDPC and rapid codes, and describes their software to optical channels;
  • Includes assurance of either fiber-optics and free-space optical (FSO) channels;
  • Is the 1st to hide the channel means of fiber-optic conversation systems;
  • Is the 1st to explain restricted coding for optical channels.

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Extra resources for Coding for Optical Channels

Sample text

In Chap. 5, we describe the codes on graphs suitable for the use of next-generation optical networks, namely TPCs and LDPC codes. Due to the fact that LDPC codes can match and outperform TPCs in terms of BER performance while having a lower complexity decoding algorithm, in this book we are mostly concerned with LDPC codes. Given the fact that LDPC-coded turbo equalizer is an excellent nonlinear ISI equalizer candidate, there naturally arises the question about fundamental limits on channel capacity of codedmodulation schemes, which is addressed in Chap.

Sab OA, Lemarie V (2001) Block turbo code performances for long-haul DWDM optical transmission systems. OFC 3:280–282 24 1 Introduction 41. Mizuochi T et al (2004) Forward error correction based on block turbo code with 3-bit soft decision for 10 Gb/s optical communication systems. IEEE J Sel Top Quantum Electron 10(2):376–386 42. Gallager RG (1963) Low density parity check codes. MIT, Cambridge, MA 43. Mizuochi T et al (2003) Next generation FEC for optical transmission systems. In: Proceedings of optical fiber communication conference (OFC 2003), vol 2, pp 527–528 44.

WDM has potential of exploiting the enormous bandwidth offered by the optical fiber. During transmission of WDM signals, occasionally one or several wavelengths are to be added or dropped, which is performed by the optical component known as optical add–drop multiplexer (OADM), as illustrated in Fig. 1. The optical networks require the switching of information among different fibers, which is performed in optical cross-connect (OXS). To combine several distinct wavelength channels into composite channel, the wavelength multiplexers are used.

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