An 11 GHz dual-sided self-calibrating dynamic comparator in 28 nm CMOS

Licensee MDPI, Basel, Switzerland. This paper demonstrates a high-speed, low-noise dynamic comparator, employing self-calibration. The proposed dual-sided, fully-dynamic offset calibration is able to reduce the input-referred offset voltage by a factor of ten compared to the uncalibrated value without any speed or noise penalty and with less than 5% power ...

DyMo: Dynamic Monitoring of Large-Scale LTE-Multicast Systems

IEEE LTE evolved Multimedia Broadcast/Multicast Service (eMBMS) is an attractive solution for video delivery to very large groups in crowded venues. However, the deployment and management of eMBMS systems are challenging, due to the lack of real-time feedback from the user equipments (UEs). Therefore, we present the Dynamic Monitoring (DyMo) ...

Friendly, appealing or both? Characterising user experience in sponsored search landing pages

  • Bron M.
  • Chute M.
  • Evans H.
  • Lalmas M.
  • Redi M.
  • Silvestri F.

© 2017 International World Wide Web Conference Committee (IW3C2), published under Creative Commons CC BY 4.0 License. Many of today's websites have recognised the importance of mobile friendly pages to keep users engaged and to provide a satisfying user experience. However, next to the experience provided by the sites themselves, ...

Analyzing uber's ride-sharing economy

  • Aiello L.
  • Djuric N.
  • Grbovic M.
  • Kooti F.
  • Lerman K.
  • Radosavljevic V.

© 2017 International World Wide Web Conference Committee (IW3C2), published under Creative Commons CC BY 4.0 License. Uber is a popular ride-sharing application that matches people who need a ride (or riders) with drivers who are willing to provide it using their personal vehicles. Despite its growing popularity, there exist ...

Building and analyzing a global co-authorship network using google scholar data

  • Chen R.
  • Chen Y.
  • Ding C.
  • Fu X.
  • Hu J.
  • Hui P.

© 2017 International World Wide Web Conference Committee (IW3C2), published under Creative Commons CC BY 4.0 License. By publishing papers together, academic authors can form a co-authorship network, modeling the collaboration among them. This paper presents a data-driven study by crawling and analyzing the vast majority of author profiles of ...

Will Serverless Computing Revolutionize NFV?

Communication networks need to be both adaptive and scalable. The last few years have seen an explosive growth of software-defined networking (SDN) and network function virtualization (NFV) to address this need. Both technologies help enable networking software to be decoupled from the hardware so that software functionality is no longer ...

Next Generation Platform as a Service: Toward Virtualized DVB-RCS2 Decoding System

Platform-as-a-Service (PaaS) cloud computing services have emerged in the last few years, offering an abstraction framework to enable the development, execution, and management of applications, which is de-coupled from complex infrastructure considerations. The next generation of PaaS solutions (NGPaaS) will have to address more stringent performance requirements compared to traditional ...

A 5GS/s 12b 158.6mW Passive-Sampling 8x-Interleaved Hybrid ADC With 9.4 ENOB and 160.5dB FoM in 28nm CMOS

Emerging 5G communication systems require ADCs to directly digitize wide bandwidth (BW) signals with high spectral purity at low power consumption. Current state-of-the-art solutions include mainly time-interleaved (TI) pipelined or pipelined-SAR architectures, enhanced by digital calibration. To ensure a sufficiently high input BW, all these designs employ a front-end buffer. ...

On Tracking the Physicality of Wi-Fi: A Subspace Approach

Wi-Fi channel state information (CSI) has emerged as a plausible modality for sensing different human activities as a function of modulations in the wireless signal that travels between wireless devices. Until now, most research has taken a statistical approach and/or purpose-built inference pipeline. Although interesting, these approaches struggle to sustain ...

Probabilistic Constellation Shaping For Optical Fiber Communications

We review probabilistic constellation shaping (PCS), which has been a key enabler for several recent record-setting optical fiber communications experiments and has been commercialized in Nokia PSE-3s coherent optical transponders. PCS provides both fine-grained rate adaptability and energy efficiency (sensitivity) gains. We discuss the reasons for the fundamentally better performance ...

Noise Analysis of Zero-Forcing Nonlinear Equalizers for Coherent WDM Systems

We explore the fundamental limits on the achievable information rate of fiber-optic coherent transmission systems equipped with ideal zero-forcing nonlinear equalizer (ZFNLE). In the absence of amplifier noise, the ZFNLE forces the nonlinear signal-signal distortions to zero. If amplifier noise is included in the analysis, the equalization performance is severely ...

Survey of Performance Acceleration Techniques for Network Function Virtualization

The ongoing network softwarization trend holds the promise to revolutionize network infrastructures by making them more flexible, reconfigurable, portable, and more adaptive than ever. Still, the migration from hard-coded/hardwired network functions towards their software-programmable counterparts comes along with the need for tailored optimizations and acceleration techniques, so as to avoid, ...

Experimental Demonstration of Dual-polarisation NFDM Transmission with b-Modulation

Dual-polarisation Nonlinear Frequency Division Multiplexing (DP-NFDM) transmission has been intensively investigated recently due to its potential of doubling the capacity in comparison to single polarisation NFDM systems. However, up to now, due to many challenges in design and practical implementation, demonstrated data rates of DP-NFDM transmission systems in experiments are ...

End-to-end time sensitive optical networking: challenges and solutions

Time sensitive applications, most notably, for 5G fronthauling and Industry 4.0, require deterministic (jitter-free) low latency, highly reactive, and trustable networks, as opposed to today's best effort Internet. We review existing solutions, both established and at the research stage, and compare them for key next-generation 5G fronthauling and industrial requirements.

Minimizing Delay and Packet Delay Variation in Switched 5G Transport Networks

A key requirement in 5G networks is the demand of minimizing transport delay. In this paper we propose and explore novel mechanisms for minimizing packet delay and delay variation in 5G mobile transport networks. Differently from mechanisms described in the literature and standardization for deterministic delay aggregation, a novel method ...


The gradient descent to a local minimum is the key ingredient of deep neural networks learning techniques. We consider a function Lm(.) in dimension n with a random set of m absolute minima. When log m = o(n) we show that a gradient descent from an initial random point quasi ...


In recent years the widespread use of Global Positioning Systems (GPS) has enhanced our abilities to find our way in outdoor environments, dispensing our over-reliance on visual features. However, GPS technologies do not solve the problem of localization and way finding in indoor environments due to transient phenomena such obstacles ...

Single Wavelength Symmetric 50 Gbit/s Equalization-Free NRZ IM/DD PON with 33 dB Loss Budget over >40 km

We demonstrate burst-mode upstream and continuous-mode downstream transmission in a 50G TDM-PON system, achieving up to 33-dB loss budget with a maximum of 77-km SMF transmission before any equalization. The system is enabled by semiconductor optical amplifiers at the transceivers.

Demonstration of ONU Activation for In-Service TDM-PON Allowing Uninterrupted Low-Latency Transport Links

We propose an upstream-traffic-disruption-free ONU activation method enabling low-latency services over TDM-PON. We demonstrate ranging using only 5-microsec-long empty window independent from fiber length, a significant improvement over 250 or 450-microsec quiet windows required in conventional ranging.

Characterization of Long Multi-Mode Fiber Links using Digital Holography

We propose to use digital holography to characterize long multi-mode fiber links. A four segment 26.5km fiber span supporting 45 spatial modes is analyzed, showing the evolution of both mode-dependent loss and cross talk.