Compensation of intra-channel nonlinear fibre impairments using simplified digital back-propagation algorithm

Rafique, Danish; Mussolin, Marco; Forzati, Marco; Mårtensson, Jonas; Chugtai, Mohsan N.; Ellis, A.D.

doi:10.1364/oe.19.009453

Cited by 130 publications

(72 citation statements)

References 15 publications

(28 reference statements)

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“…Main drawback of these techniques is the high complexity requirement in practical implementation due to large number of iterations. [13].Various investigations have been done to minimize the complexity requirement [14][15][16] .Algorithms based on DSP with DBP-SSFM and DBP-VSNE have been investigated to reduce the complexity for fiber nonlinear impairment compensation. In spite of these investigations there are number of models developed in wireless communication which can be investigated in the optical systems to further reduce the complexity.…”

Section: Imentioning

confidence: 99%

Implementation of Memory Polynomial Based Adaptive Digital Post distortion for Coherent Optical System

Mehra¹

2017

IJRASET

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The exponential growth in the ever -increasing demand of information require highly spectral efficient coherent optical systems with advanced modulation formats which allow the detection of in-phase and quadrature components of both polarizations and doubles the available capacity and spectral efficiency but the optical signal is severely degraded by linear and nonlinear transmission impairments after passing through the fiber. We have designed and implemented adaptive digital post distortion model to reduce fiber nonlinear impairments using memory polynomial for single channel DP-16QAM coherent system. Keywords: Digital Post distortion DPost-D, DP-16QAM, Memory polynomial, Coherent system, ACPR I.INTRODUCTION Due to the limitation of transmission bandwidth and the exponential growth in the demand of network traffic, mobile applications, internet video services , there is a strong requirement of the employment of highly spectral efficient coherent systems with advanced modulation formats such as Dual polarization quaternary phase shift keying (DP-QPSK) and Dual polarization 16 quadrature amplitude modulation ( DP-16QAM) which reduces the cost per bit and increase transmission capacity for high data rate signals. Higher optical signal to noise ratio (OSNR) is required with advanced modulation formats for long haul transmission system for achieving given bit error rate(BER)which requires more signal launch power in the fiber but increased launch power degrades signal quality due to kerr nonlinear effects that limits the achievable transmission distance in single channel and WDM systems [1][2][3][4][5][6][7][8].As compensation of linear effects is possible , research is boosted for compensation of nonlinear impairments which limit the transmission performance of the system. Number of techniques in optical domain and digital domain are proposed for compensation of fiber nonlinear impairments. Some of the compensation methods include electronic equalization , digital back propagation(DBP) , optical phase conjugation(OPC) ,frequency referenced transmission , phase conjugated twin waves ,spectral conversion [9-10]perturbation based nonlinear mitigation [11][12]. One of the prominent fiber transmission impairment compensation method for the coherent optical systems is the use of Digital Back-propagation (DBP) algorithm . Split step fourier transform and Volterra series nonlinear equalizer techniques based on digital back propagation have been used for fiber non linearity compensation. Main drawback of these techniques is the high complexity requirement in practical implementation due to large number of iterations. [13].Various investigations have been done to minimize the complexity requirement [14][15][16] .Algorithms based on DSP with DBP-SSFM and DBP-VSNE have been investigated to reduce the complexity for fiber nonlinear impairment compensation. In spite of these investigations there are number of models developed in wireless communication which can be investigated in the optical systems to further reduce ...

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Section: Imentioning

confidence: 99%

Implementation of Memory Polynomial Based Adaptive Digital Post distortion for Coherent Optical System

Mehra¹

2017

IJRASET

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“…In order to reduce the computational efforts of the algorithm by increasing the step-size (i.e. reducing the number of DBP calculation steps per fiber span), ultra-low-loss-fiber (ULF) is used (Pardo et al, 2011) and a promising method called correlated DBP (CBP) (Li et al, 2011;Rafique et al, 2011c) has been introduced (see section 4.1 of this chapter). This method takes into account the correlation between adjacent symbols at a given instant using a weighted-average approach, and an optimization of the position of non-linear compensator stage.…”

Section: State Of the Artmentioning

confidence: 99%

“…Recently a promising method to implement DBP is introduced by Rafique et al, 2011c) which is correlated backward propagation (CBP). The basic theme of implementing this scheme is to take into account the effect of neighbouring symbols in the calculation of non-linear phase shift φ NL at a certain instant.…”

Section: Recent Developments In Dbp 41 Correlated Backward Propagatimentioning

confidence: 99%

“…7. The correlation between neighbouring symbols is taken into account by applying a time-domain filter (Rafique et al, 2011c) corresponding to the weighted sum of neighbouring symbols. Non-linear phase shift on a given symbol by using CBP can be given as in Eq.…”

Section: Recent Developments In Dbp 41 Correlated Backward Propagatimentioning

confidence: 99%

“…In ) the investigations depict the results in 100GHz channel spaced DP-QPSK transmission and multi-span DBP shows a reduction of DBP stages upto 75%. While in (Rafique et al, 2011c) the algorithm is investigated for single channel DP-QPSK transmission. In this article upto 80% reduction in required back-propagation stages is shown to perform non-linear compensation in comparison to the standard back-propagation algorithm.…”

Section: Recent Developments In Dbp 41 Correlated Backward Propagatimentioning

confidence: 99%

See 2 more Smart Citations

Digital Backward Propagation: A Technique to Compensate Fiber Dispersion and Non-Linear Impairments

Asif¹,

Lin²,

Schmauß³

2011

Applications of Digital Signal Processing

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Nonlinear Impairments in Fiber Optic Communication Systems: Analytical Review

Payal

Kumar

2018

Communications in Computer and Information Science

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Compensation of intra-channel nonlinear fibre impairments using simplified digital back-propagation algorithm

Cited by 130 publications

References 15 publications

Implementation of Memory Polynomial Based Adaptive Digital Post distortion for Coherent Optical System

Implementation of Memory Polynomial Based Adaptive Digital Post distortion for Coherent Optical System

Digital Backward Propagation: A Technique to Compensate Fiber Dispersion and Non-Linear Impairments

Nonlinear Impairments in Fiber Optic Communication Systems: Analytical Review

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