Phase-conjugated subcarrier coding for fibre nonlinearity mitigation in CO-OFDM transmission

Le, Son Thai; Doran, Nick; Ellis, A.D.; Turitsyn, Sergei K.

doi:10.1109/ecoc.2014.6963874

Cited by 11 publications

(16 citation statements)

References 9 publications

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“…Regeneration may take many forms, ranging from Decode-and-Forward model (allowing the use of FEC in each stage), hard decision (without FEC) [134], transformation with smooth nonlinear transfer functions (TF), which results in noise squeezing [51] and distributed pulse and noise shaping [135]. System capacities for Decode-and-Forward model can be readily calculated from the capacity of a single link channel [136], whilst another approach is required for hard decision and smooth TF based regenerators, these were discussed in Sect.…”

Section: Optical Regenerationmentioning

confidence: 99%

Optical Information Capacity Processing

Sorokina

Ellis

Turitsyn

2015

Springer Series in Optical Sciences

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The never-stopping increase in demand for information transmission capacity has been met with technological advances in telecommunication systems, such as the implementation of coherent optical systems, advanced multilevel multidimensional modulation formats, fast signal processing, and research into new physical media for signal transmission (e.g. a variety of new types of optical fibers). Since the increase in the signal-to-noise ratio makes fiber communication channels essentially nonlinear (due to the Kerr effect for example), the problem of estimating the Shannon capacity for nonlinear communication channels is not only conceptually interesting, but also practically important. Here we discuss various nonlinear communication channels and review the potential of different optical signal coding, transmission and processing techniques to improve fiber-optic Shannon capacity and to increase the system reach. Introduction: Information Capacity in Optical CommunicationsThe capacity of global and local communication systems has increased dramatically over past decades, with recent laboratory experiments approaching the order of Pbits/s data rates. However, the data demands rise with time at an even higher rate at the moment calling for new technology advances. The efficiency of current transmission systems are limited by a number of physical effects, with optical noise and nonlinearity being the major challenges [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. It is well recognized nowadays that current fiber-optic communication systems and technologies are facing very specific hurdles due to the nonlinear properties of optical fiber channels, problems not existing in wireless and other linear channels. In optical fiber, the dominant

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Section: Optical Regenerationmentioning

confidence: 99%

Optical Information Capacity Processing

Sorokina

Ellis

Turitsyn

2015

Springer Series in Optical Sciences

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“…This is shown by the solid points of Fig. 1, where the performance without NLC, phase conjugate pilots (PCP) and phase conjugate subcarrier coding (PCSC) [8] are compared (taking into account the 3dB difference between Q 2 and SNR for a QPSK signal). Theoretical lines are also shown, where C is used as a fitting parameter (~ two channels equivalent bandwidth).…”

Section: Impact Of Compensation Techniquementioning

confidence: 99%

The impact of phase conjugation on the nonlinear-Shannon limit: The difference between optical and electrical phase conjugation

Ellis

Al-Khateeb

et al. 2015

2015 IEEE Summer Topicals Meeting Series (SUM)

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“…In CO-OFDM transmissions, due to the narrow frequency spacing (tens of MHz) the nonlinear phase-shifts of neighbouring subcarriers are essentially correlated, especially when 50% pre-electrical dispersion compensation (pre-EDC) is applied [13,14]. Based on this phenomenon, an effective nonlinearity compensation technique for CO-OFDM was proposed in [13] by transmitting a portion of OFDM subcarriers with its phase-conjugates pilots (PCPs, Fig.…”

Section: Nonlinearity Compensation Using Phase Conjugated Pilotsmentioning

confidence: 99%

Techniques for noise and nonlinear impairments compensation in CO-OFDM transmission

Turitsyn

2015

2015 17th International Conference on Transparent Optical Networks (ICTON)

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In this paper, we discuss recent advances in digital signal processing techniques for compensation of the laser phase noise and fiber nonlinearity impairments in coherent optical orthogonal frequency division multiplexing (CO-OFDM) transmission. For laser phase noise compensation, we focus on quasi-pilot-aided (QPA) and decision-directed-free blind (DDF-blind) phase noise compensation techniques. For fiber nonlinearity compensation, we discuss in details the principle and performance of the phase-conjugated pilots (PCP) scheme.

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Phase-conjugated subcarrier coding for fibre nonlinearity mitigation in CO-OFDM transmission

Cited by 11 publications

References 9 publications

Optical Information Capacity Processing

Optical Information Capacity Processing

The impact of phase conjugation on the nonlinear-Shannon limit: The difference between optical and electrical phase conjugation

Techniques for noise and nonlinear impairments compensation in CO-OFDM transmission

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