Spline interpolation based channel estimation for ACO-OFDM over visible light channels

Sayli, Osman; Doğan, Hakan; Panayırcı, Erdal

doi:10.1109/siu.2016.7495745

Cited by 5 publications

(6 citation statements)

References 11 publications

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“…Firstly, the aim is to define improvement proposals for the physical layers of PRIME 1.3.6 [11], PRIME 1.4 [12], and G3-PLC [13,14] technologies, trying to improve their response against disturbances present in the LV grid. Secondly, the goal is to measure and evaluate the performance enhancement of each proposed physical layer modifications following standardized test method and metrics according to European Telecommunications Standards Institute (ETSI) Technical Specification (TS) 103 909 v1.1.1 [16] and using a set of representative channel disturbances.…”

Section: Objectives and Scopementioning

confidence: 99%

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Virtual PLC Lab Enabled Physical Layer Improvement Proposals for PRIME and G3-PLC Standards

Llano¹,

Angulo

Vega

et al. 2020

Applied Sciences

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Narrowband (NB) powerline communication (PLC) is extensively adopted by utilities for the communication in advanced metering infrastructure (AMI) systems. PLC technology needs to overcome channel disturbances present in certain grid segments. This study analyzes improvement proposals of the physical layer of the main narrowband PLC technologies approved by international communication organizations that are currently deployed in Europe: Powerline Intelligent Metering Evolution (PRIME) 1.3.6, PRIME 1.4, and G3-PLC, in order to improve PLC performance under channel disturbances. This thorough study is based on simulations carried out by an innovative ad hoc Virtual PLC Lab, developed by the authors, applied in replicable, fully-automated, and cost reduced test scenarios. The analysis is performed by applying standardized test methods and metrics, and by evaluating the influence of a set of representative channel disturbances defined by the European Telecommunications Standards Institute (ETSI) and selected noises generated by distributed energy resources (DER) in normal operation. PLC performance improvements in terms of equalizer curve fitting, error correction codes, and noisy subcarrier suppression mechanisms are presented. The performance gain due to each physical improvement proposal is accurately measured and compared under the same conditions in a replicable and automated test environment in order to evaluate the use of the proposals in the evolution of future PLC technologies.As a result, sophisticated test methods are needed to evaluate, first, the effects of each type of disturbance on the different configurations of the communications technologies and, second, the efficiency of the strategies designed to overcome such disturbances. This paper proposes the use of a Virtual PLC Lab to evaluate the performance of several improvement proposals for several PLC technologies. The Virtual PLC Lab includes the whole communication system, composed not only of transmission and reception devices, but also on the characterization of the different effects of the propagation channel. As a result, it enables an efficient analysis of new coding or equalizing techniques that would require long and complex validation procedures, without the need of physically implementing these techniques in the hardware devices, reducing the time and the cost of these developments.Several articles study the NB PLC performance from 3 to 500 kHz in the presence of noise and harsh situations. This performance has been studied from multiple approaches. There are analytical studies based on generic PLC technologies [2]. Several studies are oriented to PRIME statistical performance in field setups [3,4]. Some specific studies focus on upper layer performance instead of being physical layer-oriented [5]. There are some comparisons of the performance of PLC technologies and physical layers, although these are not exactly under the same conditions [6]. Moreover, there is a lack of studies covering the PRIME standard in its recent 1.4 version and G3...

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Section: Objectives and Scopementioning

confidence: 99%

“…Studies available regarding interpolation based on spline curves are oriented to generic orthogonal frequency division multiplexing (OFDM) systems with diverse applications [16], but no studies particularizing the usage of spline curves on narrowband PLC systems have been found.…”

Section: Prime: Equalizermentioning

confidence: 99%

Virtual PLC Lab Enabled Physical Layer Improvement Proposals for PRIME and G3-PLC Standards

Llano¹,

Angulo

Vega

et al. 2020

Applied Sciences

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“…Currently, most research on VLC has increased tremendously as the visible light spectrum is uncontrolled and has much larger bandwidth 7 . The important advantages of VLC are that the visible light does not cause electromagnetic radiation, reduces carbon dioxide emission, 8 does not interfere with the operation of electronic devices using the RF band, and does not cause unwanted interference in this band.…”

Section: Introductionmentioning

confidence: 99%

“…Also, there is no health check limiting transmission power for VLC systems, and VLC provides higher security. As a result, it is expected that VLC will play a critical role in future wireless systems 7 …”

Section: Introductionmentioning

confidence: 99%

“…Currently, most research on VLC has increased tremendously as the visible light spectrum is uncontrolled and has much larger bandwidth. 7 The important advantages of VLC are that the visible light does not cause electromagnetic radiation, reduces carbon dioxide emission, 8 does not interfere with the operation of electronic devices using the RF band, and does not cause unwanted interference in this band. Due to the aforementioned features, it is obtained that VLC systems are ideal solutions for wireless information communications, particularly in risky areas such as aircraft cabins, hospitals, and chemical facilities.…”

Section: Introductionmentioning

confidence: 99%

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A novel asymmetrically clipped optical orthogonal frequency division multiplexing system based on lifting wavelet transform for visible light communications

Avcı

Aykiri

Savaşcıhabeş

et al. 2022

Int J Communication

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Summary In multicarrier visible light communication (VLC) systems, orthogonal frequency division multiplexing (OFDM) has attracted a lot of attention due to its high data rate, simple equalization, and resistance to intersymbol interference (ISI). However, high peak‐to‐average‐power ratio (PAPR) and Light Emitting Diodes (LED) nonlinearity have important effects on the performance of indoor VLC‐OFDM systems. Asymmetrically clipped optical (ACO)‐OFDM is a technique that waste spectral efficiency to transmit a single pole frequency division multiplexed signal over a single pole channel. In this study, a new ACO‐OFDM method based on lifting wavelet transform (LWT)‐ACO‐OFDM is proposed to restore this spectral efficiency and increase the performance of the ACO‐OFDM system. The performance of the proposed method is verified by computer simulation studies over additive white Gaussian noise (AWGN) channel and multipath optical channel for analytical and simulated bit error rate (BER) performance criterion. From the obtained simulation results, it is seen that the proposed method provides approximately 16‐dB SNR gain against the classic VLC‐OFDM, roughly 12‐dB Signal to Noise Ratio (SNR) improvement versus the Direct Current (DC)‐biased optical (DCO)‐OFDM, and nearly 6‐dB SNR enhancement against ACO‐OFDM on the additive white Gaussian noise channel. It is observed from computer simulation results that similar SNR gains are obtained in multipath optical channels.

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Channel estimation in ACO-OFDM employing different transforms for VLC

Vappangi

Vakamulla

2018

AEU - International Journal of Electronics and Communications

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Spline interpolation based channel estimation for ACO-OFDM over visible light channels

Cited by 5 publications

References 11 publications

Virtual PLC Lab Enabled Physical Layer Improvement Proposals for PRIME and G3-PLC Standards

Virtual PLC Lab Enabled Physical Layer Improvement Proposals for PRIME and G3-PLC Standards

A novel asymmetrically clipped optical orthogonal frequency division multiplexing system based on lifting wavelet transform for visible light communications

Channel estimation in ACO-OFDM employing different transforms for VLC

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