Does the Cross-Talk Between Nonlinear Modes Limit the Performance of NFDM Systems?

  • Aref V.
  • Buelow H.
  • Thai Le S.

We show a non-negligible cross-talk between nonlinear modes in Nonlinear Frequency division Multiplexed system when data is modulated over the nonlinear Fourier spectrum and transmitted over a lumped amplified optical link. Considering a generic modulation, we evaluate the performance loss of neglecting the cross-talks.

Improvement of Bandwidth Limitation Tolerance for High-speed PAM-4 Transmission Using Turbo Equalizer

  • Buchali F.
  • Buelow H.
  • Dischler R.
  • Hu Q.
  • Schmalen L.
  • Schuh K.

We beat the bandwidth limitation of low-cost IMDD system achieving high-speed PAM-4 transmission. With information iteratively delivered between equalizer and decoder, a low-complexity turbo equalizer is applied to cancel the inter-symbol interference caused by the hardware bandwidth limitation.

My Favorite Pattern Languages

  • Hanmer R.

A brief introduction to software patterns, pattern languages and five different pattern languages.

Volterra Series Nonlinear Equalizer Accounting for PMD

  • Czegledi C.
  • Dar R.

We propose a modified Volterra series (VS) digital backpropagation algorithm that takes into account polarization-mode dispersion (PMD) effects. The algorithm accounts only for nonlinear products that are PMD-insensitive, leading to both performance enhancement and significant complexity reduction.

Thermal Adaptation of Four-Channel Polarization Diversified Silicon Photonics WDM Receiver

  • Chen Y.
  • Dong P.
  • Gatdula R.
  • Kim K.
  • Melikyan A.

We demonstrate simultaneous wavelength locking of a silicon photonic polarization diverse 4-channel microring-based dense wavelength division multiplexing receiver. Using a single monitoring photodetector, we thermally adapt over a temperature range >20°C and demultiplex 4x25 Gb/s on-off-keying modulation with 100-GHz channel spacing.

On the performance prediction of optical transmission systems in presence of filtering

  • Delezoide C.

We investigate the impact of optical filtering from routing nodes in optical networks, and how to predict it. From measurements in presence of tight optical filtering, we propose a new method relying on an extended back-to-back model for improved QoT prediction.

Maximum Likelihood Carrier Phase Estimation Based on Monte Carlo Integration

  • Bitachon B.
  • Rios Muller R.

The mean-squared error performance and phase noise variance tolerance of a maximum likelihood carrier phase estimation algorithm based on Monte Carlo integration is evaluated and compared to two relaxed versions of this algorithm.

The Interaction between Nonlinearity and Filtering in Coherent Fiber-Optic Systems

  • Ghazisaeidi A.

A rigorous theory of nonlinear signal propagation in multi-span wavelength division multiplexed systems, including in-line optical filtering, is presented. Spontaneous emission noise coloring, linear inter-symbol-interference, and the variance of nonlinear distortions are analytically calculated and validated by numerical simulations.

On the Performance of Multi-tier Heterogeneous Cellular Networks with Idle Mode Capability

  • Chuan Ma
  • Guoqiang Mao
  • He C.
  • Lopez-Perez D.
  • Ming Ding
  • Zihuai Lin

This paper studies the impact of the base station (BS) idle mode capability (IMC) on the network performance of multi-tier and dense heterogeneous cellular networks (HCNs). Different from most existing works that investigated network scenarios with infinite user equipments (UEs), we consider a more practical setup with a finite number ...

A New Capacity Scaling Law in Ultra-Dense Networks

  • Guoqiang Mao
  • Lopez-Perez D.
  • Ming Ding

We discover a new capacity scaling law in ultradense networks (UDNs) under practical system assumptions, such as a general multi-piece path loss model, a non-zero base station (BS) to user equipment (UE) antenna height difference, and a finite UE density. The intuition and implication of this new capacity scaling law ...

Inter-Channel Crosstalk Compensation for Time-Frequency Packing Systems

  • Aref V.
  • Buchali F.
  • Buelow H.
  • Dischler R.
  • Hu Q.
  • Idler W.
  • Schmalen L.

We compensate the inter-channel interference (ICI) in time-frequency packing signal using cross-channel equalizer in combination with joint DSP. The experiment shows 1.2 dB gain in OSNR penalty and 37% increase in reach with ICI compensation.

Packaged SOA with Ultrawide-band, Large Output Power and Low Noise Figure

  • Verdier A.

We demonstrate ultra-wideband operation of a SOA module, based on the polarization diversity scheme. NF below 6 dB, Psat above 20 dBm, and gain over 15.5 dB are obtained on 120 nm

Towards a Scalable User-Space QUIC Network Stack

  • Duan Yufeng
  • Gallo M.
  • Giaccone P.
  • Laufer R.
  • Traverso S.

The introduction of kernel-bypass techniques that enable high-speed packet processing has fostered the development of scalable servers and middleboxes through the introduction of customized user-space network stacks. Despite their diffusion, such solutions are tailored to a single application or network protocol preventing their wide deployment. Motivated by the introduction of ...

Risk Thinking for Cloud-Based Application Services

  • Bauer E.

Powerpoint overview of "Risk Thinking for Cloud-Based Application Services" book by Eric Bauer, published by CRC Press, April 2017

From Documents to Dialogues: Programming Technology for the Conversational Web

  • Van Cutsem T.

A paradigm shift is taking place on the Web. Users spend less and less time using browsers and more and more time using instant messaging applications. While originally designed to facilitate communication among humans, these platforms now position themselves as "next-generation browsers" to interact with services and businesses. They do ...

MIMO Equalization for Multi-Gbit/s Communication Under Channel Variability

  • D. Vande Ginste
  • Guenach M.
  • Jacobs L.
  • Jelle Bailleul
  • Marc Moeneclae
  • P. Manfredi

Multiple-input multiple-output (MIMO) equalization at the transmitter and/or receiver has been shown to enable multi-Gbit/s communication over lowcost electrical interconnects. Because of the high operating frequencies, however, the interconnects become susceptible to manufacturing tolerances and the equalization filters must be adjusted to the specific channel realization to achieve optimal performance. ...

On the Fundamental Characteristics of Ultra-Dense Small Cell Net

  • Claussen H.
  • Lopez-Perez D.
  • Ming Ding
  • Mohamed Ali Kaafarx

In order to cope with the forecasted 1000x increase in wireless capacity demands by 2030, network operators tend to aggressively densify the network infrastructure, so as to reuse the spectrum as much as possible. However, it is important to realise that these new ultra-dense small cell networks are fundamentally different ...

A Theory of Nonlinear Signal-Noise Interactions in Wavelength Division Multiplexed Coherent Systems

  • Ghazisaeidi A.

a general theory of nonlinear signal-noise interactions for wavelength division multiplexed fiber-optic coherent transmission systems is presented. This theory is based on the regular perturbation treatment of the nonlinear Schrodinger equation, which governs the wave propagation in the optical fiber, and is exact up to the first order in the ...

1.2 Tbit/s (64 QAM at 100 GBaud) transmission over 300 km

  • Altenhain L.
  • Buchali F.
  • Dümler U.
  • Engenhardt K.
  • Eriksson T.
  • Idler W.
  • Möller M.
  • Schmalen L.
  • Schmid R.
  • Schuh K.
  • Templ W.

We demonstrate dual polarization 64 QAM transmission at 100 GBaud over 300 km ultra large effective area fiber. The achieved line rate of 1.2 Tbit/s is the highest line rate achieved without OTDM.

Algorithm for IoT service characterization: performance evaluation

  • Ammar N.
  • Le Pallec .
  • Noirie L.

With the explosion of the number and variety of connected objects, it is necessary to define a system of recommendation of IoT services to the users so that they better use the connected objects that are at their disposal. The purpose of this recommendation system is to provide the user ...