August 11, 2016

Experimental Nonlinear Frequency Domain Equalization of QPSK Modulated 2-Eigenvalue Soliton

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

Second order soliton with independently QPSK-modulated discrete spectral amplitude was transmitted over 1600-km in an NZ-DSF loop and realization induced phase distortion was equalized using soliton energy dependent phase back-rotation and eigenvalue pre-decision.

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Recent Publications

August 28, 2024

Hybrid GMM-UBM and SVM based systems for text-independent speaker verification in noisy environment

  • Carvalho D.
  • Cavalcanti G.
  • Pinheiro H.
  • Sijbers J.
  • Tsang I.
  • Tsang I.

This paper proposes a hybrid Gaussian Mixture Model-Universal Background Model (GMM-UBM) based speaker verification system for mobile devices in variable noisy environments. We applied a Support Vector Machine (SVM) classier in two GMM-UBM based text-independent speaker verification systems to improve the performance. In the first system, both hypothesized speaker and ...

May 22, 2020

Energy Savings in LTE Macro Base Stations

  • Ambrosy A.
  • Blume O.
  • Ferling D.
  • Jueschke P.
  • Wilhelm M.
  • Yu X.

In wireless access networks the traffic load varies strongly along a day and efficient concepts to adapt the power consumption of LTE macro base stations to the required traffic load are currently widely under study. Significant daily energy savings up to 35% can be achieved for different deployment scenarios by ...

February 19, 2017

Enhancing Mobile Networks with Software Defined Networking and Cloud Computing

  • Cao Z.
  • Kodialam M.
  • Lakshman T.
  • Panwar S.

In the past decade, mobile devices and applications have experienced an explosive growth, and users are expecting higher data rates and better quality services every year. In this paper, we propose several ideas to increase wireless network functionality and capacity using software-defined networking and cloud computing. Connections in mobile networks ...