Hierarchical Context Modeling for Video Event Recognition

  • Ji Q.
  • Wang X.

Current video event recognition research remains largely target-centered. For real-world surveillance videos, target-centered event recognition faces great challenges due to large intra-class target variation, limited image resolution, and poor detection and tracking results. To mitigate these challenges, we introduced a context-augmented video event recognition approach. Specifically, we explicitly capture different ...

64 x 0.5 Gbaud Nonlinear Frequency Division Multiplexed Transmissions with High Order Modulation Formats

  • Buelow H.
  • Le S.

Nonlinear frequency division multiplexing (NFDM) with the modulation of the nonlinear Fourier spectrum (both discrete and continuous parts), have been recently considered as a promising transmission method to combat fiber nonlinearity impairments. In this paper, we experimentally demonstrate the generation, detection and transmission performance of NFDM systems where the transmitted ...

Nonlinear signal multiplexing for communication beyond the Kerr nonlinearity limit

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

Current optical fibre transmission systems rely on modulation, coding and multiplexing techniques which were originally developed for linear communication channels. However, linear transmission techniques are not fully compatible with a transmission medium with nonlinear optical response such as silica. As a consequence, the Kerr nonlinearity imposes a limit on the ...

Data Sketching

Energy-Spectral Efficiency Tradeoffs in 5G Multi-Operator Networks With Heterogeneous Constraints

  • Aydin O.
  • Aziz D.
  • Jorswieck E.
  • Zappone A.

Along with spectral efficiency (SE), energy efficiency (EE) is a key performance metric for the design of 5G and beyond 5G (B5G) wireless networks. At the same time, infrastructure sharing among multiple operators has also emerged as a new trend in wireless communication networks. This paper presents an optimization framework ...

A Capacitor-DAC-Based Technique For Pre-Emphasis-Enabled Multilevel Transmitters

  • Chang M.
  • Chen Y.
  • Du Y.
  • Hu B.
  • Huang R.
  • Lee J.

This brief presents a capacitor digital-to-analog converter (DAC) based technique that is suitable for pre-emphasis-enabled multilevel wireline transmitter design in voltage mode. Detailed comparisons between the proposed technique and conventional direct-coupling-based as well as resistor-DAC-based multilevel transmitter design techniques are given, revealing potential benefits in terms of speed, linearity, implementation ...

Millimeter Wave Communications for Future Mobile Networks

  • Bjornson E.
  • Cli
  • Dai L.
  • Ghosh A.
  • Huang Y.
  • Karagiannidis G.
  • Li Y.
  • Matthaiou M.
  • Mumtaz S.
  • Xiao M.
  • Yang K.

Millimeter wave (mmWave) communications have recently attracted large research interest, since the huge available bandwidth can potentially lead to the rates of multiple gigabit per second per user. Though mmWave can be readily used in stationary scenarios, such as indoor hotspots or backhaul, it is challenging to use mmWave in ...

Empowering Stream Processing through Edge Clouds

  • Janssens N.
  • Luis Veiga
  • Sergio Esteves
  • Theeten B.

CHive is a new streaming analytics platform to run distributed SQL-style queries on edge clouds. However, CHive is currently tightly coupled to a specific stream processing system (SPS), Apache Storm. In this paper we address the decoupling of the CHive query planner and optimizer from the runtime environment, and also ...

Assessing the Impact of Library Sharing in Containers-Based Infrastructures

  • Bravo Ferreira J.
  • Cello M.
  • Omana Iglesias J.

With the surge in popularity of container-based infrastructures, and microservices gaining further traction as a choice in software design, the logical result is a collection of many, agile software components that need to be run thousands of times, adjusting to a highly dynamic load. An unfortunate consequence of this deconstruction ...

Polar-coded modulation based on the amplitude phase shift keying constellations

  • Dai J.
  • Dong C.
  • Guan H.
  • Niu K.
  • Sun J.
  • Zhang Y.
  • Zhou D.

In this paper, we investigate the polarization effect of the amplitude phase shift keying (APSK) constellations. We find that the polarization effect of the APSK constellations is affected by the bit mapping and the bit loading. Traditionally, the Gray mapping is usually adopted in APSK constellations. Based on the given ...

InP DHBT technology optimization for power amplifiers at mm-wave frequencies

  • Dupuy J.
  • Johansen T.
  • Konczykowska A.
  • Midili V.
  • Nodjiadjim V.
  • Riet M.
  • Squartecchia M.

An optimized InP Double Heterojunction Bipolar Transistor (DHBT) technology is presented for millimeter-wave power amplifiers at E-band and higher frequencies. Single- and multi-finger transistors with 0.7um emitter width are designed for high frequency and high power applications. The static and frequency performances of the fabricated devices are discussed. Reported cutoff ...

Low-resource Multi-task Audio Sensing for Mobile and Embedded Devices via Shared Deep Neural Network Representations

  • Bhattacharya S.
  • Georgiev P.
  • Lane N.
  • Mascolo C.

Continuous audio analysis from embedded and mobile devices is an increasingly important application domain. More and more, appliances like the Amazon Echo, along with smartphones and watches, and even research prototypes seek to perform multiple discriminative tasks simultaneously from ambient audio; for example, monitoring background sound classes (e.g., music or ...

Overlay transmission of sporadic random access and broadband traffic for 5G networks

  • Berardinelli G.
  • Viswanathan H.

Providing services to devices with varied rate, latency and energy consumption requirements is a major challenge for 5th Generation (5G) radio access technology. Overlay transmission or non-orthogonal multiple access, wherein multiple devices with same or different service requirements use the same time-frequency resources, may overcome the poor trunking efficiency of ...

3D thermal simulations and modeling of multi-finger InP DHBTs for millimeter-wave power amplifiers

  • Dupuy J.
  • Johansen T.
  • Konczykowska A.
  • Midili V.
  • Nodjiadjim V.
  • Riet M.
  • Squartecchia M.

This paper presents the comparison between the simulated and measured thermal resistance of InP Double Heterojunction Bipolar Transistors (DHBT). 3D thermal simulations were carried out in order to compute the temperature distribution across the full structure due to a constant power excitation of devices with up to 8 emitter fingers. ...

Long delay optical feedback sensitivity of hybrid III-V/SOI directly modulated DFB lasers

  • Accard A.
  • Duan G.
  • Gallet A.
  • Grillot F.
  • Huang H.
  • Make D.
  • Olivier S.
  • Schires K.
  • Song M.

Hybrid III-V/SOI DFB lasers subjected to external optical feedback is analyzed. Its impact on optical spectrum, eye diagram and bit error rate (BER) is discussed.

Network Energy: Problematic and solutions towards sustainable ICT

  • Chiaroni D.

The energy efficiency has been identified by international institutions as fundamental to have a major ecological impact on the planet. This paper will draw new technical directions to make the network of tomorrow more sustainable.

Comparison of 5G waveform candidates in high speed scenario

  • Chen X.
  • Liu Y.
  • Miao D.
  • Wang F.
  • Zhao Z.
  • Zheng Q.

Summary form only given. Strong light-matter coupling has been recently successfully explored in the GHz and THz [1] range with on-chip platforms. New and intriguing quantum optical phenomena have been predicted in the ultrastrong coupling regime [2], when the coupling strength Ω becomes comparable to the unperturbed frequency of the ...

Packet segmentation for contention-based transmission in 5G

  • Tuo X.
  • Wang F.
  • Wang D.
  • Zhang Y.
  • Zhao Z.

Summary form only given. Strong light-matter coupling has been recently successfully explored in the GHz and THz [1] range with on-chip platforms. New and intriguing quantum optical phenomena have been predicted in the ultrastrong coupling regime [2], when the coupling strength Ω becomes comparable to the unperturbed frequency of the ...

Non-orthogonal waveforms for machine type communication

  • Chen X.
  • He X.
  • Miao D.
  • Wang F.
  • Zhao Z.

Summary form only given. Strong light-matter coupling has been recently successfully explored in the GHz and THz [1] range with on-chip platforms. New and intriguing quantum optical phenomena have been predicted in the ultrastrong coupling regime [2], when the coupling strength Ω becomes comparable to the unperturbed frequency of the ...

Passive Chaos Bandwidth Enhancement Under Dual-Optical Feedback with Hybrid IIIâ?"V/Si DFB Laser

  • Duan G.
  • Gallet A.
  • Gomez S.
  • Grillot F.
  • Schires K.

The chaotic dynamics of a DFB laser are studied experimentally under a combination of short and long feedbacks. Chaos bandwidth enhancement is demonstrated using a hybrid IIIâ?"V/Si DFB laser with a large relaxation oscillation frequency (ROF) of 14Â GHz. The impact of short feedback on the ROF is studied and ...