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View article: Fiber Nonlinearity Mitigation in Coherent Optical Systems
Fiber Nonlinearity Mitigation in Coherent Optical Systems Open
Fiber nonlinearity represents a critical challenge to the capacity enhancement of modern optical communication systems. In recent years, significant research efforts have focused on mitigating its impact through two complementary approache…
View article: A New Twist on Low-Complexity Digital Backpropagation
A New Twist on Low-Complexity Digital Backpropagation Open
This work proposes a novel low-complexity digital backpropagation (DBP) method, with the goal of optimizing the trade-off between backpropagation accuracy and complexity. The method combines a split step Fourier method (SSFM)-like structur…
View article: Cost-Gain Analysis of Sequence Selection for Nonlinearity Mitigation
Cost-Gain Analysis of Sequence Selection for Nonlinearity Mitigation Open
We propose a low-complexity sign-dependent metric for sequence selection and study the nonlinear shaping gain achievable for a given computational cost, establishing a benchmark for future research. Small gains are obtained with feasible c…
View article: A New Twist on Low-Complexity Digital Backpropagation
A New Twist on Low-Complexity Digital Backpropagation Open
This work proposes a novel low-complexity digital backpropagation (DBP) method, with the goal of optimizing the trade-off between backpropagation accuracy and complexity. The method combines a split step Fourier method (SSFM)-like structur…
View article: A Security Plane Architecture for Ultra-Low-Energy, High-Capacity Optical Transport Networks
A Security Plane Architecture for Ultra-Low-Energy, High-Capacity Optical Transport Networks Open
The evolution toward agile, ultra-low-energy, high-capacity optical transport networks can benefit from solutions incorporating multi-band, multi-fiber, and point-to-multipoint (P2MP)/sliceable high-capacity transport technologies carefull…
View article: Coherent transceiver architecture enabling data transmission and optical identification
Coherent transceiver architecture enabling data transmission and optical identification Open
We propose a coherent transceiver architecture able to transmit information and enhance the security of the optical network by identifying other optical systems and subsystems. Simulations show that identification is obtained with sufficie…
View article: Sequence-Selection-Based Constellation Shaping for Nonlinear Channels
Sequence-Selection-Based Constellation Shaping for Nonlinear Channels Open
Probabilistic shaping is, nowadays, a pragmatic and popular approach to improve the performance of coherent optical fiber communication systems. In the linear regime, the potential of probabilistic shaping in terms of shaping gain and rate…
View article: Sequence selection for nonlinear probabilistic shaping: toward a practical implementation
Sequence selection for nonlinear probabilistic shaping: toward a practical implementation Open
The performance and implementation of nonlinear probabilistic shaping is discussed. We propose a sequence selection scheme that avoids the interaction with forward error correction and achieves a gain of 0.082 bits/s/Hz.
View article: Sequence-Selection-Based Constellation Shaping for Nonlinear Channels
Sequence-Selection-Based Constellation Shaping for Nonlinear Channels Open
Probabilistic shaping is a pragmatic approach to improve the performance of coherent optical fiber communication systems. In the nonlinear regime, the advantages offered by probabilistic shaping might increase thanks to the opportunity to …
View article: Optical identification using physical unclonable functions
Optical identification using physical unclonable functions Open
In this work, the concept of optical identification (OI) based on physical unclonable functions is introduced for the first time, to our knowledge, in optical communication systems and networks. The OI assigns an optical fingerprint and th…
View article: Optical identification using physical unclonable functions
Optical identification using physical unclonable functions Open
In this work, the concept of optical identification (OI) based on physical unclonable functions is introduced for the first time, to our knowledge, in optical communication systems and networks. The OI assigns an optical fingerprint and th…
View article: On the Nonlinear Shaping Gain With Probabilistic Shaping and Carrier Phase Recovery
On the Nonlinear Shaping Gain With Probabilistic Shaping and Carrier Phase Recovery Open
The performance of different probabilistic amplitude shaping (PAS)techniques in the nonlinear regime is investigated, highlighting its dependence on the PAS block length and the interaction with carrier phase recovery (CPR). Different PAS …
View article: Practical Implementation of Sequence Selection for Nonlinear Probabilistic Shaping
Practical Implementation of Sequence Selection for Nonlinear Probabilistic Shaping Open
We propose two novel techniques to implement sequence selection (SS) for fiber nonlinearity mitigation, demonstrating a nonlinear shaping gain of 0.24 bits/s/Hz, just 0.1 bits/s/Hz below the SS capacity lower bound.
View article: On the Nonlinear Shaping Gain with Probabilistic Shaping and Carrier Phase Recovery
On the Nonlinear Shaping Gain with Probabilistic Shaping and Carrier Phase Recovery Open
The performance of different probabilistic amplitude shaping (PAS) techniques in the nonlinear regime is investigated, highlighting its dependence on the PAS block length and the interaction with carrier phase recovery (CPR). Different PAS…
View article: New Lower Bounds on the Capacity of Optical Fiber Channels via Optimized Shaping and Detection
New Lower Bounds on the Capacity of Optical Fiber Channels via Optimized Shaping and Detection Open
Constellation shaping is a practical and effective technique to improve the performance and the rate adaptivity of optical communication systems. In principle, it could also be used to mitigate the impact of nonlinear effects, possibly inc…
View article: New Lower Bounds on the Capacity of Optical Fiber Channels via Optimized Shaping and Detection
New Lower Bounds on the Capacity of Optical Fiber Channels via Optimized Shaping and Detection Open
Constellation shaping is a practical and effective technique to improve the performance and the rate adaptivity of optical communication systems. In principle, it could also be used to mitigate the impact of nonlinear effects, possibly inc…
View article: A Sequence Selection Bound for the Capacity of the Nonlinear Fiber Channel
A Sequence Selection Bound for the Capacity of the Nonlinear Fiber Channel Open
A novel technique to optimize the input distribution and compute a lower bound for the capacity of the nonlinear optical fiber channel is proposed. The technique improves previous bounds obtained with the additive white Gaussian noise deco…
View article: Tailored Shaping, Improved Detection, Simpler Backpropagation: the Road to Nonlinearity Mitigation
Tailored Shaping, Improved Detection, Simpler Backpropagation: the Road to Nonlinearity Mitigation Open
Several strategies for nonlinearity mitigation based on signal processing at the transmitter and/or receiver side are analyzed and their effectiveness is discussed. Improved capacity lower bounds based on their combination are presented.
View article: Tailored Shaping, Improved Detection, Simpler Backpropagation: the Road\n to Nonlinearity Mitigation
Tailored Shaping, Improved Detection, Simpler Backpropagation: the Road\n to Nonlinearity Mitigation Open
Several strategies for nonlinearity mitigation based on signal processing at\nthe transmitter and/or receiver side are analyzed and their effectiveness is\ndiscussed. Improved capacity lower bounds based on their combination are\npresented…
View article: A Sequence Selection Bound for the Capacity of the Nonlinear Fiber\n Channel
A Sequence Selection Bound for the Capacity of the Nonlinear Fiber\n Channel Open
A novel technique to optimize the input distribution and compute a lower\nbound for the capacity of the nonlinear optical fiber channel is proposed. The\ntechnique improves previous bounds obtained with the additive white Gaussian\nnoise d…
View article: Coupled-Channel Enhanced SSFM for Digital Backpropagation in WDM Systems
Coupled-Channel Enhanced SSFM for Digital Backpropagation in WDM Systems Open
A novel technique for digital backpropagation (DBP) in wavelength-division multiplexing systems is introduced and shown, by simulations, to outperform existing DBP techniques for approximately the same complexity.
View article: Mitigating the Impact of Noise on Nonlinear Frequency Division Multiplexing
Mitigating the Impact of Noise on Nonlinear Frequency Division Multiplexing Open
In the past years, nonlinear frequency division multiplexing (NFDM) has been investigated as a potentially revolutionary technique for nonlinear optical fiber communication. However, while NFDM is able to exploit the Kerr nonlinearity, its…
View article: Interplay of Probabilistic Shaping and Carrier Phase Recovery for Nonlinearity Mitigation
Interplay of Probabilistic Shaping and Carrier Phase Recovery for Nonlinearity Mitigation Open
The interaction between carrier phase recovery and probabilistic amplitude shaping (PAS) in the nonlinear regime is investigated. We show that, for sufficiently high signal-to-noise ratio, the first provides the same inter-channel nonlinea…
View article: Hierarchical Distribution Matching for Probabilistic Amplitude Shaping
Hierarchical Distribution Matching for Probabilistic Amplitude Shaping Open
Probabilistic amplitude shaping—implemented through a distribution matcher (DM)—is an effective approach to enhance the performance and the flexibility of bandwidth-efficient coded modulations. Different DM structures have been proposed in…
View article: Hierarchical Distribution Matching: a Versatile Tool for Probabilistic Shaping
Hierarchical Distribution Matching: a Versatile Tool for Probabilistic Shaping Open
The hierarchical distribution matching (Hi-DM) approach for probabilistic shaping is described. The potential of Hi-DM in terms of trade-off between performance, complexity, and memory is illustrated through three case studies.
View article: Hierarchical Distribution Matching: a Versatile Tool for Probabilistic\n Shaping
Hierarchical Distribution Matching: a Versatile Tool for Probabilistic\n Shaping Open
The hierarchical distribution matching (Hi-DM) approach for probabilistic\nshaping is described. The potential of Hi-DM in terms of trade-off between\nperformance,complexity, and memory is illustrated through three case studies.\n
View article: Polarization-multiplexed nonlinear inverse synthesis with standard and reduced-complexity NFT processing: erratum
Polarization-multiplexed nonlinear inverse synthesis with standard and reduced-complexity NFT processing: erratum Open
We correct a formula for the numerical nonlinear Fourier transform in [1]. The conclusions of our work are unchanged.
View article: Improved Detection Strategies for Nonlinear Frequency-Division Multiplexing
Improved Detection Strategies for Nonlinear Frequency-Division Multiplexing Open
Two novel detection strategies for nonlinear Fourier transform-based transmission schemes are proposed. We show, through numerical simulations, that both strategies achieve a good performance improvement (up to 3 dB and 5 dB) with respect …
View article: Polarization-multiplexed nonlinear inverse synthesis with standard and reduced-complexity NFT processing
Polarization-multiplexed nonlinear inverse synthesis with standard and reduced-complexity NFT processing Open
In this work, we study the performance of polarization division multiplexing nonlinear inverse synthesis transmission schemes for fiber-optic communications, expected to have reduced nonlinearity impact. Our technique exploits the integrab…