NB- Photonics seminar by Jean-Paul Linnartz from Signify

18-10-2021 from 11:30 to 12:30
online via Teams
Kamal Kaur
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The next NB-Photonics seminar will take place on 18th October. Jean-Paul Linnartz from Signify will give talk on “Optical Wireless Communication: merging insights from radio systems, fiber communications and from photonics”.

Jean-Paul Linnartz is a Research Fellow at Signify and a Professor in the EE Signal Processing group of TU Eindhoven. He is the technical leader of the Signify LiFi Research and of the EU ELioT project. Previously, he headed research groups in Security, in Connectivity and in IC Design. He is Fellow of the IEEE for leadership in security with noisy data, and his invention of an IoT hardware security approach used in now 250 Million semiconductor ICs.



The research culture in radio communication differs from that in fiber optics. The fiber community is driven by every growing bit rates per connection, while the radio community is well aware that speeding up individual links does not necessarily resolve congestion nor decreases latency jitter for its users. Secondly, fiber connections are extremely stable compared to the variability in radio. Radio research therefor seems to rely more on re-using statistical models and it tends to build a stronger theoretical basis for achieving near-optimum throughputs. In his opinion, OWC is in need of better theoretical foundations.      With his team, Jean-Paul Linnartz has been studying the dynamic photonic principles of light generation, starting from electron-hole recombination, to build a signal processing equivalent representation of the LED properties. He challenges several previously used models that see LED distortion as non-invertible clipping. As LED distortion appears largely invertible, it leads to a new class of channel equalizers. Optical wireless systems promise very dense reuse of the spectrum without interference, thereby offering excellent Quality of Service. However, this requires also a full robustness against accidental blockage of the light beam. Distributed MIMO can uniformly “illuminate” a space without sharp shadows, thus protects against blocking single lines of sight. But adaptive bit loading differs from radio settings.

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