We propose an adaptive pre-compensation using second order memory less polynomial to mitigate dynamic nonlinearity in LEDs. The scheme will improve the performance of IEEE 802.15.7 standard N-level colcur shift keying (N-CSK) modulation for indoor visible-light optical wireless communication system. The N-CSK system is implemented and Voronoi segmentation is employed to decode N-CSK constellation. Decoding performance is simulated by Monte Carlo method and verified experimentally. Symbol error rate (SER) and error vector magnitude (EVM) at the receiver shows improved decoding performance of CSK through pre-distortion compensation of LEDs. © 2016 IEEE.

ABHIRUP BARMAN

Radio Physics and Electronics

A HALDER

University of Calcutta (informally known as Calcutta University or CU) is a collegiate public state university located in Kolkata, West Bengal, India.&nbsp;Within India it is recognized as a &quot;Five-Star University&quot; and accredited &quot;A&quot; Grade by National Assessment and Accreditation Council.

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The University of Calcutta has secured the Fifth position among the Universities of India in the prestigious &quot;Indian University Ranking 2019&quot; list, released by the NIRF of the Ministry of Human Resource Development, Government of India.

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It was established on 24 January 1857, and was one of the first institutions in Asia to be established as a multidisciplinary and Western-style university. Its alumni and faculty include several heads of state, heads of government, social reformers, prominent artists, only academy award winner and Dirac medal winner in India, many Fellows of the Royal Society and five Nobel laureates as of 2019 which is highest in South Asia.

University Of Calcutta

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

16th International Conference on Numerical Simulation of Optoelectronic Devices, NUSOD 2016

We analyze the performance of IEEE 802.15.7 standard colour shift keying (CSK) modulation for visible-light indoor wireless optical communication system. Judiciously combining the available wave lengths for red, green and blue LEDs indoor wireless communication at constant intensity can be made with the energy efficient next generation lighting system. Design of multilevel CSK constellation for high bit rate transmission is a challenging problem. In this work, Voronoi segmentation is employed for decoding $$M$$M-CSK constellation and system performance is evaluated. Monte Carlo simulation shows superiority of our method over the other existing CSK constellation decoding in terms of better received SNR and symbol error rate. Inter symbol interference (ISI) is the chief source of degrading performance in communication with 2D LED chip. Simple linear equalization by LMS and RLS is found suitable to mitigate ISI and provide improved symbol error rate performance and increased field of view in the receiver. © 2014, Springer Science+Business Media New York.

Journal	Data powered by Typeset16th International Conference on Numerical Simulation of Optoelectronic Devices, NUSOD 2016
Publisher	Data powered by TypesetInstitute of Electrical and Electronics Engineers Inc.
Open Access	No