NDLI: Simplified and accelerated PPM receivers for VLC systems

Content Provider	IET Digital Library
Author	Sönmez, Mehmet
Abstract	This study presents two receivers for visible light communication (VLC) systems. First, modified pulse position modulation (PPM) (MPPMD) and variable pulse position modulation (VPPM) (MVPPMD) demodulators are considered for MPPM and traditional VPPM schemes. The aim of this study is to minimise complexity at the receiver. On the basis of the derived mathematical framework, the multiplication stage is removed from the coherent detector architecture. Moreover, the generation of mask signals is unnecessary for the proposed receiver because they would be multiplied by the modulated signal for the traditional coherent detector. The simulation results show that MPPMD has the same bit error rate (BER) performance compared with the traditional coherent demodulators. Additionally, the resource utilisation of MPPM and VPPM receivers is dramatically reduced with removing the multiplication stage and the mask generator. Second, an accelerated VPPM (A-VPPM) algorithm is proposed to achieve a fast demodulation of the VPPM signal under the unknown dimming-level condition. Compared with the earlier VPPM receivers, the A-VPPM receiver can also demodulate the VPPM signal without any iteration stage and the mask generator. The BER performance of A-VPPM receiver is close to that of the traditional VPPM demodulator at 30 and 70% dimming levels.
Starting Page	36
Ending Page	43
Page Count	8
ISSN	17518768
Volume Number	12
e-ISSN	17518776
Issue Number	Issue 1, Feb (2018)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-opt/12/1
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-opt.2017.0052
Journal	IET Optoelectronics
Publisher Date	2017-09-26
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	A-VPPM Receiver Accelerated PPM Receivers Amplifier BER Performance Bit Error Rate Coherent Detector Architecture Communication Complexity Demodulation Demodulation Process Dimming-level Condition Equipment And System Error Statistics Free Space Optical Communication Free Space Optical Link Mathematical Framework Modified Pulse Position Modulation Modulated Signal Modulation And Coding Method Optical Communication Device Optical Communication Equipment Optical Modulation Optical Receiver Pulse Position Modulation Resource Utilisation Variable Pulse Position Modulation Demodulators Visible Light Communication System VLC System
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Electrical and Electronic Engineering

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