January 01, 2017

1.72 Tbs Virtual-Carrier Assisted WDM Direct-Detection Transmission over 200km

  • Aref V.
  • Buchali F.
  • Buelow H.
  • Chagnon M.
  • Dischler R.
  • Engenhard K.
  • Engenhardt K.
  • Schuh K.
  • Thai Le S.

Supporting the ever-increasing data-center-interconnect (DCI) traffic in a cost effective manner is a great challenge, which requires innovative transmission and digital signal processing (DSP) techniques. Recently, single side-band (SSB) direct-detection (DD) transmissions have been actively considered for data rate beyond 100 Gb/s per channel and distance of hundreds of kilometers due to its capability of electronic chromatic dispersion (EDC) compensation. In addition, several effective DSP techniques for compensating signal-signal beating interference (SSBI) due to the squared-law detection of the photodiode (PD) have been intensively investigated, such as Kramers-Knonig (KK) and iterative SSBI cancellation schemes, showing promising results at data rate over 200 Gb/s and distance beyond 100 km. In this paper, we demonstrate that high-performance, low-complexity SSB DD transmissions could be achieved by generating a digital carrier (virtual carrier) together with the complex information-bearing signal at the transmitter using only two digital-to-analog converters (DACs). Combining this transmission technique with either the KK field reconstruction or a two-stage SSBI cancellation scheme at the receiver, 8x215Gbps net-data-rate WDM signals have been transmitted over a record span length of 200 km at 1550 nm

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Recent Publications

January 01, 2019

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  • 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, ...

January 01, 2019

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 ...

January 01, 2019

The paradigm-shift of social spambots: Evidence, theories, and tools for the arms race

  • Cresci S.
  • Petrocchi M.
  • Pietro R.
  • Spognardi A.
  • Tesconi M.

© 2017 International World Wide Web Conference Committee (IW3C2), published under Creative Commons CC BY 4.0 License. Recent studies in social media spam and automation provide anecdotal argumentation of the rise of a new generation of spambots, so-called social spambots. Here, for the first time, we extensively study this novel ...