An Adaptive Symbol Decomposition With Serial Transmission for O-OFDM-Based VLC System

Jia, Kejun; Yang, Boran; Cao, Maoyong; Lin, Ying; Li, Suoping; Li, Hao

doi:10.1109/lcomm.2020.3041122

Cited by 7 publications

(6 citation statements)

References 8 publications

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“…The most straightforward approach is to design the waveform to be insensitive to nonlinearities. PAPR reduction is a viable method for LED nonlinearity mitigation [5]- [7].…”

Section: Introductionmentioning

confidence: 99%

Time-Delay Twin Support Vector Regression- Based Adaptive Predistorter for LED Nonlinearity in Visible Light Communications

et al. 2023

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The bit error rate (BER) of visible light communications (VLC) based on light emitting diodes (LEDs) has been limited due to the nonlinearity of LED. Artificial neural networks (ANNs) predistorters were applied to mitigate the impacts of LED nonlinearity. However, none of them can efficiently approach the performance of linear VLC systems due to the overfitting issue. In this paper, we for the first time propose a predistorter with adaptive indirect learning architecture based on amplitude timedelay twin support vector regression (ATD-TSVR) for LED nonlinearity in orthogonal frequency division multiplexing(OFDM)-based VLC systems. The experimental results demonstrate the signal distortion caused by LEDs as the major nonlinear source. Moreover, the simulation results show superior BER, amplitude distortion (AM/AM) curves, Power Spectral Density(PSD) and constellation plots in an 80Mbit/s OFDM nonlinear VLC system. Meanwhile, as compared to the traditional SVR approach, the CPU training time of ATD-TSVR can be reduced by more than four times. The adaptive pre-distortion method herein is generally applicable to broadband VLC systems and also proves the application prospect and effectiveness of TSVR in VLC system

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“…The most straightforward approach is to design the waveform to be insensitive to nonlinearities. PAPR reduction is a viable method for LED nonlinearity mitigation [5]- [7].…”

Section: Introductionmentioning

confidence: 99%

Time-Delay Twin Support Vector Regression- Based Adaptive Predistorter for LED Nonlinearity in Visible Light Communications

et al. 2023

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“…By applying optical orthogonal frequency division multiplexing (O-OFDM), the elastic optical networks (EONs) can allocate the number of subcarriers flexibly according to the service size, further improve the frequency utilization rate, and become the next generation of intelligent power backbone optical network with great potential [6][7] . Specifically, O-OFDM allows the frequency spectrum of a single subcarrier to overlap due to orthogonality, which saves bandwidth resource [8] . In addition, various data rates from Gbps to Tbps are supported by O-OFDM through flexible granularity aggregation.…”

Section: Introductionmentioning

confidence: 99%

Intelligent Orchestration Algorithm for Power Backbone Optical Network with Service QoS Awareness

Liang

Zhu

et al. 2022

J. Phys.: Conf. Ser.

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The power backbone optical network has the shortcomings of low spectrum utilization, and high service blocking rate, which cannot satisfy the differentiated quality of service (QoS) demands of the power services. This paper proposed a power backbone optical network architecture that uses elastic optical networks (EONs) to improve frequency utilization, and proposes an upper confidence bound (UCB)-based intelligent orchestration algorithm for power backbone optical network. Simulation verified that the proposed intelligent orchestration algorithm can improve the performance of the intelligent bandwidth allocation and meet the requirements of differentiated QoS demands.

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“…In [15], an adaptive symbol decomposition with serial transmission (ASDST) scheme is proposed to reduce clipping distortion. According to the signal amplitude, the O-OFDM symbols can be decomposed into multiple O-OFDM symbols within the dynamic range of the LEDs by adaptive iterative clipping.…”

Section: Introductionmentioning

confidence: 99%

An Adaptive Iterative Symbol Clipping Scheme for OFDM-Based Visible Light Communication

Jia

Qin²,

Yang³

et al. 2022

Wireless Pers Commun

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In this paper, an adaptive iterative symbol clipping scheme for OFDMbased visible light communication systems is proposed. This scheme can avoid the disadvantages of the conventional iterative signal clipping (ISC) scheme that produces all-zero symbols due to the fixed iterative clipping times, and also avoids the information transmission rate degradation due to an adaptive symbol decomposition with serial transmission (ASDST) scheme using serial transmission. In the proposal, optical orthogonal frequency division multiplexing (O-OFDM) symbols are decomposed into multiple O-OFDM symbols that are in the linear range of the LEDs after adaptive iterative clipping according to the signal amplitude and clipping threshold, thereafter simultaneously transmitted through multiple LEDs. When the number of LEDs is large enough, clipping distortion can be significantly reduced or even completely eliminated. In addition, the all-zero symbols existing in the ISC scheme can be completely eliminated. Experimental results show that the proposed scheme can not only improve the BER performance and the optical power efficiency, but also reduce the clipping times compared with

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An Adaptive Symbol Decomposition With Serial Transmission for O-OFDM-Based VLC System

Cited by 7 publications

References 8 publications

Time-Delay Twin Support Vector Regression- Based Adaptive Predistorter for LED Nonlinearity in Visible Light Communications

Time-Delay Twin Support Vector Regression- Based Adaptive Predistorter for LED Nonlinearity in Visible Light Communications

Intelligent Orchestration Algorithm for Power Backbone Optical Network with Service QoS Awareness

An Adaptive Iterative Symbol Clipping Scheme for OFDM-Based Visible Light Communication

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