An inexpensive multi-channel AC heater control system

  • Dorthe L.
  • Kolodner P.

A commonly-encountered problem in the experimental modeling of thermal-management solutions is the need to independently power many sources of heat. A typical telecomm circuit pack, for example, may contain a dozen or more ICs or optical components, and we would like to test cooling solutions by replacing each IC with ...

Nonlinear Dynamics and Bifurcation Behavior of a 2-DOF Spring Resonator with End Stopper for Energy Harvesting

  • A. El Aroudi
  • B. Fu
  • D. O’Connell
  • E. Alarcon
  • E. Blokhina
  • Frizzell R.
  • O. Feely

In this paper, the model of a two-degree-of-freedom (2-DOF) spring resonator with end stopper for an energy harvesting application is presented. Then we characterize its nonlinear dynamical behavior by numerical simulations when some suitable parameters are varied. The system is formed by two resonators subject to external vibrational excitation and ...

Piecewise Modelled Impact Resonator for Energy Harvesting Systems

  • Boyang Fu
  • Diarmuid O'Connell
  • Frizzell R.

In this work, a novel resonator model with Coulomb damping has been developed. Fitting analysis between simulation results and experimental data shows that the proposed model exhibits better performance compared to the conventional mass-spring with a simple viscous damper model. The piecewise characteristics existing in the proposed model also show ...

Numerical Study of Mixing in Microchannels Enhanced by Vibrating Stirs

  • Lei S.
  • Qingfeng Xia
  • Xiaochuan Yang

In this paper, mixing in microscale channels augmented by vibrating stirs is numerically studied. The micro-mixer comprises of several micro stirs (µ-stirs) placed in the microscale channel. Chaotic advection appears for the fact that the incoming flow interplays with the µ-stirs being transversely moving between two sidewalls. A two-dimensional numerical ...

A New Technique for Scaling Microwave Capacity

  • Blinet A.

Modern microwave systems offer new approaches such as advanced packet compression and higher order modulation for increasing microwave channel capacity. However, there comes a point in time when channel capacity cannot be further increased. In these cases, combining 2 or more channels into a higher capacity virtual link takes microwave ...

Cross-layered and Interactive Techniques for Energy Minimization of M2M Networks

  • Lin C.
  • Venkateswaran V.

Machine to Machine (M2M) networks are severely constrained by the overall energy available for sensing and communication at sensor nodes. The existing techniques minimize energy focus on specific network components and optimize its energy consumption. This paper explores a unified approach to optimize for energy consumption in the overall M2M ...

Network Global Expectation Model of Routing and Grooming in Multi-Layer Service Transport

  • Atkinson G.
  • Korotky S.
  • Simsarian J.

We present an analytical model to estimate the expected minimum numbers of network elements required to support traffic demands in a multi-layer service transport network for the case where grooming of demands into channels is permitted at all nodes. This new formulation expands upon earlier models and makes use of ...

Carrier Recovery Algorithms and Real-time DSP Implementation for Coherent Receivers

  • Pfau T.

Different carrier recovery algorithms and strategies are presented and compared in terms of performance and hardware complexity, along with insights into the real-time implementation of such algorithms.

Vision of future Applications for Graphene in Telecommunications

  • Templ W.

Graphene is a new material with promising properties enabling new components supporting a wide range of applications in future telecommunication systems. The presentation introduces the needs and requirements of future communication systems and shows how they could be addressed by future Graphene based components.

ICT Drivers for Nanolectronics

  • Templ W.

The presentation is sumarsising the major trends in electronic communication and deriving technical requirements to future nanoelectronic semiconductor technologies.

HARP-A New Concept for Realising RF-Transmitters

  • Pascht A.
  • Templ W.
  • Vadim Lebedev
  • Wiegner D.

The in the following described HARP transmitter concept is an exciting and unconventional approach to a possible new disruptive rf-transmitter-architecture based on the idea of spectral composition of the desired RF power signal rather than generation by the conventional lineup of D/A conversion, modulation/up-conversion and amplification. The core component of ...

Dynamic of TCP Bandwidth Sharing

  • Lautenschlaeger W.

Traditionally TCP bandwidth sharing has been investigated mainly by stochastic approaches due to its seemingly chaotic nature. Even though of great generality, the theories deal mainly with expectation values, which is prone to misinterpretation with respect to the Quality-of-Experience (QoE). We disassemble TCP operating conditions into dominating scenarios and show ...

A Generative Model for Predicting Outcomes in College Basketball

  • Perez-Cruz F.
  • Ruiz F.

Gambling is one of mankind's oldest activities, as evidenced by writings and equipment found in tombs and other places, and the birth of probability theory is attributed to Pascal and Fermat in 1654 on the fair division on an interrupted game of chance (Hacking, 1975). In this paper, we aim ...

Map/Reduce Uncollapsed Gibbs Sampling for Bayesian Non Parametric Models

  • Molina-Bulla H.
  • Moreno P.
  • Perez-Cruz F.
  • Pradier M.
  • Ruiz F.
  • Valera I.

We propose a Map/Reduce parallel Gibbs sampling framework for Bayesian nonparametric (BNP) models. Our proposal relies on the idea of sampling all the hidden variables in order to break their dependencies, as it has been proposed in the related literature. We present it in a way that is easily generalizable ...

Spezifikation und Charakterisierung eines volldigitalen Sendepfades für breitbandige und energieeffiziente Multistandard-RF-Transmitter (Teilvorhaben in BMBF UTTERMOST; Abschlussbericht; Final report of our activities in BMBF/CATRENE Project UTTERMOST)

  • Bohn T.
  • Haslach C.
  • Markert D.
  • Templ W.
  • Ulrich Seyfried

Modulation schemes used by >3G mobile communication systems are using rf-signals with high peak to average ratio, thus imposing high challenges to the design of energy-efficient rf-power amplifiers. Additionally the increasing number of various customer requirements and localizations demands for flexible hardware solutions at the same time. Rf-switch mode power ...

NFV and SDN: Key Concepts and Their Challenges Towards Virtualization in the Telecommunications Industry

  • Bauer M.
  • Hilt V.

NFV and SDN: Key Concepts and Their Challenges Towards Virtualization in the Telecommunications Industry

Review of the basic line coding techniques for high-speed electrical interconnects

  • Guenach M.
  • Jacobs L.
  • Kozicki B.
  • Moeneclaey M.

A review of baseband modulation techniques intended for use in high-speed electrical interconnects is presented. A general framework is developed and used to compare the performance of traditional baseband formats and partial response coding. A special focus is placed on spectral characteristics suitable for the high-speed electrical interconnects. For that ...

BL OpenDay Demonstrator Video

  • Sienel J.

Video showing the public demonstration of the Bell Labs Open Day 2013 prototype on Telephony Service over MediaCloud.

Future NFV Orchestration: Analytics-driven vIMS Management

  • Hilt V.
  • Sienel J.

Advanced management of Virtualized Network Functions (VNF) using knowledge about structure of the virtualized service, service performance data, and demand prediction.