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Erschienen in: Optical and Quantum Electronics 3/2017

01.03.2017

Adaptive pre-compensation of LEDs for improved decoding of N-CSK in visible light communication

verfasst von: Alak Halder, Abhirup Das Barman

Erschienen in: Optical and Quantum Electronics | Ausgabe 3/2017

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Abstract

We propose an adaptive pre-compensation with second order memory less polynomial to mitigate dynamic nonlinearity in LEDs. The scheme improves the performance of IEEE 802.15.7 standard N-level colour shift keying (N-CSK) modulation for indoor visible-light optical wireless communication system. LED linearization technique is implemented for 16-CSK system and its decoding performance is analyzed employing Voronoi cell segmentation of constellations. The decoding performance of 16-CSK is further improved by optimizing the distance between adjacent signal constellations in the transmitter. The performance of the scheme is simulated by Monte Carlo method and verified experimentally. The symbol error rate and error vector magnitude at the receiver shows significant improvement of decoding performance of 16-CSK through optimized modulation and pre-distortion compensation of LEDs.

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Metadaten
Titel
Adaptive pre-compensation of LEDs for improved decoding of N-CSK in visible light communication
verfasst von
Alak Halder
Abhirup Das Barman
Publikationsdatum
01.03.2017
Verlag
Springer US
Erschienen in
Optical and Quantum Electronics / Ausgabe 3/2017
Print ISSN: 0306-8919
Elektronische ISSN: 1572-817X
DOI
https://doi.org/10.1007/s11082-017-0928-4

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