Spectrum Allocation with Flexible Frame Structure

  • Di Yuan
  • Liao Q.
  • Nikolaos Pappas
  • You Lei

This paper explores the potential of allocating spectrum resource under flexible frame structure for accommodating services with different types of requirements. Computational complexity is rigorously analyzed. A scalable algorithm is proposed based on searching in both primal space and dual space, which are shown to be complementary to each other ...

Phase-sensitive amplifier link with distributed Raman amplification

  • Andrekson P.
  • Astra E.
  • Benjamin F.
  • Eliasson H.
  • Karlsson M.
  • Olsson S.
  • Vijayan K.

© 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement We demonstrate long-haul transmission using a hybrid amplifier approach combining distributed Raman amplification and lumped phase-sensitive amplification. Aside from the well-known resulting SNR improvement, distributed Raman amplification is included in an effort to improve ...

Effect of Backhaul Constraints on Uplink Femtocell Networks

  • Jalali S.
  • Poor V.
  • Zeinalpour-Yazdi Z.

IEEE One promising approach to expand the coverage and enhance the performance of cellular networks is to employ multi-tier cellular networks. In this paper, an uplink two-tier communication network is studied, in which macro users, femto users and femto access points are geometrically located inside the coverage area of a ...

Forced convection in the wakes of impacting and sliding bubbles

  • Donnelly B.
  • Murray D.
  • Nolan K.
  • O'Reilly Meehan R.
  • Persoons T.
  • Williams N.

Both vapour and gas bubbles are known to significantly increase heat transfer rates between a heated surface and the surrounding fluid, even with no phase change. The cooling structures observed are highly temporal, intricate and complex, with a full description of the surface cooling phenomena not yet available. The current ...

Guest Editorial: Optical Networks Supporting Interoperability and White Boxes

  • Bigo S.
  • Sambo N.
  • Schmidtke H.
  • Shaikh A.
  • Suzuki M.
  • Tomkos I.

Preface to the Special Issue on Data Center Communications

  • Earnshaw M.
  • Li M.
  • Petropoulos P.
  • Vusirikala V.

Fast flow volume estimation

  • Ben Basat R.
  • Einziger G.
  • Friedman R.

The increasing popularity of jumbo frames means growing variance in the size of packets transmitted in modern networks. Consequently, network monitoring tools must maintain explicit traffic volume statistics rather than settle for packet counting as before. We present constant time algorithms for volume estimations in streams and sliding windows, which ...

Parametric analysis of laminar pulsating flow in a rectangular channel

  • Alimohammadi S.
  • Blythman R.
  • Jeffers N.
  • Murray D.
  • Persoons T.

Pulsating flow has potential for enhanced cooling of future electronics and photonics systems. To better understand the mechanisms underlying any heat transfer enhancement, it is necessary to decouple the mechanical and thermal problems. The current work performs a parametric analysis of the flow hydrodynamics using particle image velocimetry (PIV) measurements, ...

Guest Editorial Special Issue on Emerging Social Internet of Things: Recent Advances and Applications

  • Bhattacharya S.
  • Bhuiyan M.
  • Fortino G.
  • Goscinski A.
  • Hassan M.
  • Li J.
  • Zhou M.

The concept of Social Internet of Things (SIoT) has emerged from the integration of social networking into the core of the Internet of Things (IoT). It envisions IoT objects and devices to have social interactions with each other autonomously, cooperate with other agents, and exchange information with human users and ...

High Bending-Mode Sensitivity of Printed Piezoelectric Poly(vinylidenefluoride- co-trifluoroethylene) Sensors

  • Krijnen G.
  • Rajala S.
  • Schouten M.
  • Tuukkanen S.

© Copyright 2018 American Chemical Society. Printable piezoelectric sensors were fabricated on a flexible polyethylene terephthalate (PET) substrate. Solution-processed piezoelectric poly(vinylidenefluoride-co-trifluoroethylene) ink was used as an active layer. Evaporated silver on PET was used as the bottom electrode and the painted silver glue as the top electrode. The sensors were ...

Ultrafast Spontaneous Emission from a Slot-Antenna Coupled WSe<inf>2</inf>Monolayer

  • Desai S.
  • Eggleston M.
  • Fortuna S.
  • Javey A.
  • Madhvapathy S.
  • Messer K.
  • Wu M.
  • Xiao J.
  • Yablonovitch E.
  • Zhang X.

Optical antennas can enhance the spontaneous emission rate from nanoemitters by orders of magnitude, enabling the possibility of an ultrafast, efficient, nanoscale LED. Semiconductors would be the preferred material for such a device to allow for direct high-speed modulation. However, efficient nanoscale devices are challenging to implement because of high ...

Experimental Demonstration of A Low-Complexity Phase Noise Compensation for CO-OFDM Systems

  • Le S.
  • Megret P.
  • Nguyen T.
  • Wuilpart M.

IEEE In this letter, a low-complexity phase noise compensation scheme based on Kalman filtering theory is experimentally demonstrated for coherent optical orthogonal frequency division multiplexing (CO-OFDM) transmissions. The proposed scheme can operate in two modes, pilot-aided mode and blind mode, resulting in a variety of phase noise tracking configurations upon ...

Enriching Taxonomies with Functional Domain Knowledge

  • Ajwani D.
  • Dutta S.
  • Nicholson P.
  • Parthasarathy S.
  • Sala A.
  • Vedula N.

Knowledge hierarchies have become immensely useful and popular in a wide variety of fields owing to their applicability in structurally organizing and conveniently navigating information. A plethora of techniques have been developed to automatically build knowledge hierarchies from a variety of data sources. Nevertheless, maintaining such extensive knowledge bases and ...

Integration of New Concepts in Knowledge Hierarchies

  • Ajwani D.
  • Dutta S.
  • Nicholson P.
  • Parthasarathy S.
  • Sala A.
  • Vedula N.

Knowledge hierarchies have become immensely useful and popular in a wide variety of fields owing to their applicability in structurally organizing and conveniently navigating information. A plethora of techniques have been developed to automatically build knowledge hierarchies from a variety of data sources. Nevertheless, maintaining such extensive knowledge bases and ...

Massive Machine Type Communications over 5G using Lean Protocols and Edge Proxies

  • Benno S.
  • Bhatia R.
  • Esteban J.
  • Gupta B.
  • Lakshman T.
  • Samardzija D.
  • Tavares M.

We present a novel solution for Massive Machine Type Communications (mMTC) over wireless networks comprising of Edge Proxies and Lean Protocols. Our solution is designed to reduce the overheads associated with data exchange from massive number of low complexity, low power machine type devices. The solution allows the full richness ...

Physical Layer Security in TDD Massive MIMO

  • Ashikhmin A.
  • Basciftci Y.
  • Koksal C.

IEEE We consider a single-cell downlink time division duplex (TDD) based massive MIMO communication in the presence of an adversary capable of jamming and eavesdropping simultaneously. We show that massive MIMO communication is naturally resilient to no training-phase jamming attack in which the adversary jams only the data communication and ...

Multimode and Coupled-Core Fiber Amplifiers

  • Alvarado-Zacarias J.
  • Amezcua-Correa A.
  • Amezcua-Correa R.
  • Antonio-López J.
  • Axel Schülzgen
  • Bigot-Astruc M.
  • Chen H.
  • Eznaveh Z.
  • Fontaine N.
  • Gonnet C.
  • Ryf R.
  • Sillard P.

We report recent advances in multimode-and coupled-core fiber amplifiers for SDM. The amplifiers gain goes up to 20dB, operating at low mode-dependent-loss. Adequate fibers design and pumping configuration allows for exploiting multiple benefits of these two approaches making them suitable for employment in transmission links.

Inter-polarization mixers for coherent detection of optical signals

  • Chandrasekhar S.
  • Chen Y.
  • Dong P.
  • Fontaine N.
  • Kim K.
  • Melikyan A.

Electro-magnetic (EM) mixers are fundamental building blocks in communication systems. They are used in frequency/wavelength filters, interferometric modulators, amplitude-phase receivers, to name a few. Traditional EM mixers have two or more input ports and work only for co-polarized signal and local-oscillator (LO) incident on its inputs. Here we report on ...

A Novel Constellation Rotation Algorithm to Reduce Transmitter Noise

  • Almonacil S.
  • Jenneve P.
  • Layec P.
  • Ramantanis P.

We propose a constellation phase rotation technique to mitigate digital-to-analog converters induced penalty. We demonstrate by simulations and experiments that our technique enables up to 1 dB of system signal-to-noise ratio improvement for 16-QAM signals. OCIS codes: (060.1660) Coherent communications;

A Novel Constellation Phase Rotation Method to Reduce Transmitter Noise in Metro Links

  • Almonacil S.
  • Jenneve P.
  • Layec P.
  • Ramantanis P.

IEEE We present a novel constellation phase rotation method to mitigate the DACs quantization penalty resulting from pre-compensation of chromatic dispersion (CD) in optical metro links where low-resolution digital-to-analog converters (DACs) may be used to be cost- and power-efficient. The CD-induced constellation rotation increases the peak-to-average power-ratio (PAPR) of the ...