Polarization effects in nonlinearity compensated links

  • Awwad E.
  • Charlet G.
  • Fernandez De Jauregui Ruiz I.
  • Ghazisaeidi A.
  • Tran P.

We experimentally assess the impact of PDL and PMD on the performance of nonlinear compensation algorithms in dispersion unmanaged links. We show that PDL significantly degrades algorithm gains and increase gain fluctuations, while PMD has only a small impact.

Transmission of Waveforms Determined by 7 Eigenvalues with PSK-Modulated Spectral Amplitudes

  • Aref V.
  • Buelow H.
  • Idler W.

Eigenvalues of a 2-ns waveform and their PSK-modulated spectral amplitudes were optimized by taking constraints of link, transmitter, and receiver into account. These signals were generated and transmitted over 576-km of NZ-DSF fiber spans with 2E-4 SER.

Improved Flexibility in Rate and Reach by Time-Frequency Packed QPSK

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

We experimentally demonstrate a transmission with flexible rate and reach using time-frequency-packed DP-QPSK. A digital filter is properly designed to pack the QPSK signal with baud rate ranging from 32 to 64GBaud/s into a 32 GHz bandwidth.

Embedded In-Band DQPSK Signaling within n-QAM Data Transmission

  • Buchali F.
  • Dischler R.
  • Schmalen L.

We propose embedded short sequences of DQPSK-symbols within a n-QAM data stream for independent signaling on transponder level. In experiment we demonstrate a simplified processing chain obtaining a BER margin of factor 10 vs. data BER.

A Novel Fixed Throughput Nonlinear Cross-Channel Compensation: Flexible K-Best GML

  • Bigo S.
  • Layec P.
  • Rossi N.

We propose a novel blind nonlinear cross-channel compensation method based on Generalized Maximum Likelihood and offering a fixed throughput implementation easing the hardware logic integration. Simulations show a 1.8dB gain in nonlinear tolerance.

Performance Analysis of 60 GHz Wireless Access with Beam Misalignment

  • Du J.
  • Xiao M.
  • Yang G.

High speed wireless access on 60 GHz spectrum relies on highly directional antenna beams to overcome the serve signal attenuation. However, perfect transmit-receive antenna beam alignment is rare in practice and overheard signals from concurrent transmissions may cause significant interference. In this paper we analyze the impact of antenna beam ...


  • Hofmann M.

Charts for presentation by Markus Hofmann, Head of Application Platforms & Software Systems Research, Nokia Bell Labs,at the Bell Canada Leadership Conference in Toronto on April 13, 2016

A 2-D Adaptive Nonlinearity Resistance Approach for Future Efficient Mobile Fronthaul

  • Hu X.
  • Ye C.

We propose a cross frequency-time 2-D nonlinearity resistance approach, and demonstrate that this tech can bring over system nonlinearity tolerance and an extra 3dB SNR gain in high-density analogy optics/fibre fronthaul transmission solutions

Demonstration and Analysis on PAM-4-8, DB-PAM-2-4, DMT Formatted TDM-PON with 25Gbps, 40Gbps, 50Gbps Capacity per Lane using Economical 10Gbps Transceiver

  • Hu X.
  • Ye C.

We demonstrate 25Gbps/40Gbps/50Gbps TDM-PONs using PAM-2/4/8, duo-binary PAM-2/4, and DMT formats on economical 10Gbps transceivers. Based on the performance/cost analysis and comparison, we also introduce a general guidance on format choice for 25Gbps+ PONs.

Object recognition via compressive sensing

  • Ahn J.

When the compressive sensing theory is applied to compressive imaging of natural images, we get fewer non-pixel measurements instead of pixel values. We propose how to make the direct use of compressed measurements without time-consuming image recovery for object recognition. For this, we use an orderly-permuted Hadamard matrix as a ...

On Channel Estimation Performance in Multi-Cell TDD Systems

  • Gacanin H.
  • Ligata A.

In this paper, we analyze the bit error rate (BER) and mean square error (MSE) performance for data uplink of a multi-cell TDD system with imperfect knowledge of channel state information (CSI). We investigate the impact of imperfect CSI, channel tracking methods and pilot contamination on the achievable performance, and ...

Fighting exponential traffic growth - Is mobile network energy efficiency a desperate game?

  • Gruber M.

Based on Bell Labs presidential talk given by Oliver Blume

Traffic Monitoring in Software Defined Networks using Opendaylight controller

  • Hebbar A.
  • Luong D.
  • Outtagarts A.

Software Defined Network (SDN) is an emerging approach in network technology appeared in recent years. In the SDN revolution, OpenFlow is defined as the first communication standard to separates the control plane and data plane this allows the control plane to be centralized by an OpenFlow con-troller. The rise of ...

Compensation of Imperfections Caused by Digital Pulse Width Modulation Using Frequency Dependent Baseband Injection

  • Yu X.

All-digital transmitter is a hot topic since a few years. One of the key elements of all-digital transmitters is the modulator, which modulates the baseband IQ signal onto a carrier frequency in the form of digital binary signals. The combination of delta-sigma modulation and pulse width modulation is a very ...

Future Cable Networks Enabling Future Wireless Networks

  • Glapa M.

Helping MSOs on their path to delivering wireless services by understanding the best strategy required, identifying what kind of network is needed and how they can get there.

100 GSa/s BiCMOS DAC supporting 400 Gb/s dual carrier transmission

  • Buchali F.
  • Hu Q.
  • Idler W.
  • Schuh K.
  • Templ W.

We demonstrate generation of 32Gbaud 16QAM dual-carrier channel from one laser utilizing a novel 100GSa/s BiCMOS digital-to-analog converter. Fiber transmission over 1950 km of SSMF is also demonstrated.

Ultracompact and ultra-wide operational bandwidth optical isolator based on a silicon waveguide and a multi-mode interferometer

  • Chang C.
  • Chen Y.
  • De Valicourt G.
  • Dong P.

We design and fabricate a simple ultracompact and ultra-wide operational bandwidth optical isolator. It is made up of a silicon waveguide (nonlinear attenuator) and a multi-mode interferometer (linear attenuator). We measure and achieve more than 5 dB isolation from 1525 nm to 1575 nm.

mmMAGIC D5.1: Initial multi-node and antenna transmitter and receiver architectures and schemes

  • A. Clemente
  • A. Westlund
  • A. Wolfgang
  • B. Makki
  • Baracca P.
  • C. Fang
  • Ferling D.
  • Halbauer H.
  • J. Luo
  • M. Castañeda
  • M. Hunukumbure
  • M. Iwanow
  • N. Vucic
  • P. Zetterberg
  • R. D'Errico
  • T. Svensson
  • Y. Qi
  • Y. Wang

This deliverable provides the initial concepts and solutions from the technical work of WP5, in the form of multi-antenna and multi-node transceiver schemes in millimeter wave (denoted as 6-100GHz) spectrum. It also briefly presents the use cases on which the WP5 work will be based on and categorizes the solutions ...

Optimal fronthaul capacity allocation and training for joint uplink receiver in C-RAN

  • Boviz D.
  • Sheng Yang

In Cloud Radio Access Networks (C-RAN) one of the main challenges is accurate data transfer on limited capacity fronthaul links between Remote Radio Heads (RRHs) and the central processing unit. Particularly in large-band and multiantenna transmissions, fronthaul capacity can be a limiting factor. In this paper we study the impact ...

Consolidated state of the art surveys (ESRs 3-4)

  • Suryaprakash V.

Deliverable D2.1 for the European project ACT5G containing state of the art analysis carried out by the PhD students involved in the project.