LED non-linearity mitigation in a NOMA-OFDM VLC system using a union of precoder and companding

The power domain non-orthogonal multiple access (NOMA) has been considered as an outstanding candidate for 5G visible light communication networks. Due to the various salient features like robustness to multi-path fading, low latency, high compatibility with multiple input multiple output systems, e...

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Bibliographic Details
Published in:Optical and quantum electronics Vol. 54; no. 10
Main Authors: Sharan, Nishant, Ghorai, Swapan Kumar, Kumar, Ajit
Format: Journal Article
Language:English
Published: New York Springer US 01.10.2022
Springer Nature B.V
Subjects:
5G mobile communication
Bit error rate
Characterization and Evaluation of Materials
Communication networks
Companding
Computer Communication Networks
Electrical Engineering
Lasers
Network latency
Nonlinearity
Nonorthogonal multiple access
Optical communication
Optical Devices
Optics
Orthogonal Frequency Division Multiplexing
Photonics
Physics
Physics and Astronomy
Waveforms
NOMA
DCO-OFDM
Precoder
PAPR
Compander
BER
ISSN:0306-8919, 1572-817X
Online Access:Get full text
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Summary:The power domain non-orthogonal multiple access (NOMA) has been considered as an outstanding candidate for 5G visible light communication networks. Due to the various salient features like robustness to multi-path fading, low latency, high compatibility with multiple input multiple output systems, etc. orthogonal frequency division multiplexing access (OFDM) is foreseen to exist in 5G systems. NOMA-based optical OFDM (O-OFDM) is expected to be a promising candidate for supporting high rate internet connectivity, especially for green indoor mobile networks. The OFDM waveform suffers from high PAPR issue. The high PAPR degrades the BER and also enhances the non-linearity in an O-OFDM system. In this paper, a hybrid technique using a blend of precoder with compander is implemented to reduce the PAPR of NOMA based DC-biased O-OFDM (DCO-OFDM) system. The proposed NOMA DCO-OFDM system exhibits a low PAPR of only 4.3 dB. Also, for a reference bit error rate of 10 - 4 , the proposed technique displays an error vector magnitude of 13.2 dB.
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ISSN:0306-8919
1572-817X
DOI:10.1007/s11082-022-04043-6