Non-Linear Phase Noise Mitigation Over Systems Using Constellation Shaping

Pilori, Dario; Nespola, A.; Forghieri, F.; Bosco, Gabriella

doi:10.1109/jlt.2019.2917308

Cited by 26 publications

(14 citation statements)

References 34 publications

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“…This is due to the larger ratio between the variance of the short-correlated NLPN and the one of the Gaussian noise component, which requires a finer phase estimation in order to approach the constellation obtained after ideal PN cancellation. In this condition, a less hardware intensive approach could be the implementation of an uncorrelated PN aware soft decoding strategy as proposed in [3]. Finally, for medium transmission distance with Np = 16 similar results to the long-haul case are observed, while with Np = 64 we clearly observe a region in which SS-VW and DS CPR are able to approach the theoretical phase noise mitigation with less than 0.1 dB SNR penalty.…”

Section: Analysis and Resultssupporting

confidence: 63%

“…Finally it is interesting to understand the relative weight of the NLIN dynamics and of the incomplete mitigation of the linear phase noise on the achievable performance observed with the proposed CPR. This information can in fact provide a quantification of the improvement which is possible to obtain by using additional DSP designed specifically for handling short-correlated NLPN as in [3]. For this purpose we apply DS CPR in the case of a linear channel in which, to perform a fair comparison, the ASE power after each span is properly adjusted to match the whole ResN+ASE power observed in the two cases previously presented after ideal phase noise removal.…”

Section: Figure 1 (Ac) Snr After the Proposed Cpr Implementations Amentioning

confidence: 99%

“…In contrast to the amplified spontaneous emission (ASE) noise, which characterizes the linear channel, NLIN can show a significant amount of phase and polarization rotation noise [2], causing the additive white Gaussian noise (AWGN) channel model to become an unacceptable approximation. This behavior is particularly evident in the case of short reach transmission, low symbol rate and propagation over low dispersion fibers [3], and it is enhanced when high order modulation formats are employed [4]. One can phenomenologically separate NLIN into two components to analyze its statistics: a nonlinear phase noise component (NLPN) and an additive Gaussian noise component, which we call residual noise (ResN) [5].…”

Section: Introductionmentioning

confidence: 99%

“…We perform this estimation in different transmission scenarios by using as a comparison the signal to noise ratio (SNR) after ideal phase noise compensation obtained through the statistical analysis proposed in [5]. This allows us to understand how much the post-DSP constellation approaches the AWGN model, and thus, what performance gain can be obtained by employing additional mitigation strategies as for example the nonlinear-aware soft-decoding scheme proposed in [3].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Achievable Mitigation of Nonlinear Phase Noise through Optimized Blind Carrier Phase Recovery

Rosa¹,

Richter²

2020

2020 22nd International Conference on Transparent Optical Networks (ICTON)

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Partial mitigation of nonlinear phase noise by standard carrier phase recovery has been reported both, experimentally and through simulations. In this paper we quantify the achievable mitigation by using different implementations of the carrier phase recovery. All the approaches are based on the widespread blind phase search algorithm but follow different optimization strategies for handling simultaneously both, linear and nonlinear impairments of the channel. We apply the algorithms on probabilistically shaped signals transmitted over standard single mode fiber and non-zero dispersion shifted fiber in order to consider conditions in which the system performance is evidently affected by nonlinear phase noise. The results obtained are finally compared to the statistically estimated achievable phase noise removal. This allows to evaluate in different system scenarios an upper bound to the potential gain obtainable by algorithms developed to mitigate the detrimental impact of shortcorrelated nonlinear phase noise.

show abstract

Section: Analysis and Resultssupporting

confidence: 63%

Section: Figure 1 (Ac) Snr After the Proposed Cpr Implementations Amentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Achievable Mitigation of Nonlinear Phase Noise through Optimized Blind Carrier Phase Recovery

Rosa¹,

Richter²

2020

2020 22nd International Conference on Transparent Optical Networks (ICTON)

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show abstract

“…Furthermore, the studies in [ and [20] proposed heuristic design methods to increase the constellation's robustness in a phase noise dominated channel. Alternatively, the work in [21] demonstrated significant reach gains by using the PCAWGN model in non-linear channel transmission for both probabilistic and geometrically shaped (GS) formats. Lastly, a recent study in [22] looked at employing end-to-end deep learning model to geometrically shape phase noise-robust multi-dimensional constellations for optical communications in PCAWGN channel.…”

mentioning

confidence: 99%

The Partially-Coherent AWGN Channel: Transceiver Strategies for Low-Complexity Fibre Links

Dzieciol

Sillekens

Liga

et al. 2021

J. Lightwave Technol.

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Carrier phase estimation (CPE) is one of the key requirements to perform intradyne coherent detection in optical communication systems. Residual errors in the phase estimation at the receiver, also known as residual phase noise (RPN), follow the so-called Tikhonov distribution. In the digital domain, a channel where the phase has already been estimated by the CPE is generally known as a partially-coherent additive white Gaussian noise (PCAWGN) channel. Herein, we present a joint strategy to modulate and demodulate a 2-dimensional (2D) signal in a PCAWGN channel. Using a low-complexity demapper, we geometrically shape (GS) 8-to 64-ary modulation formats for a PCAWGN channel. Through numerical simulations, we then assess the bit-wise achievable information rates (AIRs) and post forward error correction (FEC) bit error rates (BER) of the presented constellations with the: theoretical optimum model, Euclidean model and the low-complexity PCAWGN model. The resulting constellations are shown to be tolerant to a significant amount of RPN and are therefore applicable to coherent optical communication systems using high linewidth lasers (e.g., > 500 kHz) and/or lower symbol rates. Moreover, we demonstrate that shaped PCAWGN constellations combined with a low-complexity demapper can either significantly relax laser linewidth (LW) or carrier phase estimation (CPE) requirements. Assuming a rate-9/10 LDPC scheme, we demonstrate post-FEC BER shaping gains of up to 2.59 dB and 2.19 dB versus uniform 64QAM and 64-ary constellations shaped for the purely AWGN channel, respectively.

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Proposal of PPM-RZ-mQAM scheme for suppressing nonlinear phase noise in high spectral ultra-DWDM system

Abdulzahrah

Hmood

2021

Opt Quant Electron

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Non-Linear Phase Noise Mitigation Over Systems Using Constellation Shaping

Cited by 26 publications

References 34 publications

Achievable Mitigation of Nonlinear Phase Noise through Optimized Blind Carrier Phase Recovery

Achievable Mitigation of Nonlinear Phase Noise through Optimized Blind Carrier Phase Recovery

The Partially-Coherent AWGN Channel: Transceiver Strategies for Low-Complexity Fibre Links

Proposal of PPM-RZ-mQAM scheme for suppressing nonlinear phase noise in high spectral ultra-DWDM system

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