An AC Input Inductor-Less LED Driver for Efficient Lighting and Visible Light Communication

Gao, Yuan; Li, Lisong; Mok, Philip K. T.

doi:10.1109/jssc.2018.2829204

Cited by 11 publications

(8 citation statements)

References 22 publications

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“…Because the proposed system has Sallen key APF with cut off frequency to reduce the ambient light noise from the environment. Moreover, to prove the efficiency of the proposed system, it is compared with one VLC-LPF [22]. The comparative analysis of the proposed system is given as follows: Table 2 shows the performance analysis of the proposed system with VLC-LPF [22] that contains process technology, area, modulation scheme, power consumption, data rate and BER.…”

Section: Resultsmentioning

confidence: 99%

“…Moreover, to prove the efficiency of the proposed system, it is compared with one VLC-LPF [22]. The comparative analysis of the proposed system is given as follows: Table 2 shows the performance analysis of the proposed system with VLC-LPF [22] that contains process technology, area, modulation scheme, power consumption, data rate and BER. From the Table 2 it summarizes that the proposed methodology gives better performance when compared to VLC-LPF [22].…”

Section: Resultsmentioning

confidence: 99%

“…The comparative analysis of the proposed system is given as follows: Table 2 shows the performance analysis of the proposed system with VLC-LPF [22] that contains process technology, area, modulation scheme, power consumption, data rate and BER. From the Table 2 it summarizes that the proposed methodology gives better performance when compared to VLC-LPF [22]. The data rate and BER of the proposed system is increased because of the noise reduction of Sallen key APF with the cut off frequency of 150 Hz for HPF.…”

Section: Resultsmentioning

confidence: 99%

“…The filter structure used in this work fails to consider the noise which is in the bands of low pass and band pass. Gao, Y., Li, L. and Mok, P.K [22] presented the VLC system with the utilization of digitalized power stage and controller to create better communication. Here both the VLC application and illumination are achieved by using the inductor-less LED driver with the features of 8-W, 89.2% efficiency.…”

Section: A Sallen Key All Pass Filter For Noise Reduction In Visible mentioning

confidence: 99%

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A Sallen Key All Pass Filter for Noise Reduction in Visible Light Communication Systems

2019

ijeat

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Visible-light communication (VLC) uses a solid-state illumination device for generating high speed communication links. VLC is used throughout world for eliminating the shortage of wireless spectrum resources. The VLC is generally an Optical Wireless Communication (OWC) method and this uses the Light Emitting Diode (LED) for data transmission through the optical wireless channel. The data transmission though the VLC is affected by ambient light interference due to the environment. In this paper, an efficient filter is designed to eliminate the ambient light noises from the received signal. The filter used in the VLC system is Sallen key All Pass Filter (APF) and the red LED and Photo detector (PD) is used in the transmitter and receiver respectively. The Sallen key APF contains three different filter structures such as low pass, band pass and high pass filter. The Sallen APF uses the filter process with respect to the noise. This proposed system is implemented in two different tools namely MATLAB and Electric VLSI. The performance of the proposed system is analyzed in terms of Bit Error Rate (BER), area, power consumption and data rate.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: A Sallen Key All Pass Filter For Noise Reduction In Visible mentioning

confidence: 99%

See 2 more Smart Citations

A Sallen Key All Pass Filter for Noise Reduction in Visible Light Communication Systems

2019

ijeat

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“…The residual current ripple from the LED driver introduces unwanted low-frequency light intensity modulation and, hence, reduces the modulation depth of VLC signals. Optimised LED driver circuits for VLC have been proposed to address the flicker issue [ 34 , 35 ]. In this paper, we still use the existing LED driver with the flicker problem in order to fully reuse the existing illumination system and keep the modification within a minimum degree.…”

Section: Introductionmentioning

confidence: 99%

A 40 Mb/s VLC System Reusing an Existing Large LED Panel in an Indoor Office Environment

Ghassemlooy

Zvánovec

et al. 2021

Sensors

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With advances in solid-state lighting, visible light communication (VLC) has emerged as a promising technology to enhance existing light-emitting diode (LED)-based lighting infrastructure by adding data communication capabilities to the illumination functionality. The last decade has witnessed the evolution of the VLC concept through global standardisation and product launches. Deploying VLC systems typically requires replacing existing light sources with new luminaires that are equipped with data communication functionality. To save the investment, it is clearly desirable to make the most of the existing illumination systems. This paper investigates the feasibility of adding data communication functionality to the existing lighting infrastructure. We do this by designing an experimental system in an indoor environment based on an off-the-shelf LED panel typically used in office environments, with the dimensions of 60 × 60 cm2. With minor modifications, the VLC function is implemented, and all of the modules of the LED panel are fully reused. A data rate of 40 Mb/s is supported at a distance of up to 2 m while using the multi-band carrierless amplitude and phase (CAP) modulation. Two main limiting factors for achieving higher data rates are observed. The first factor is the limited bandwidth of the LED string inside the panel. The second is the flicker due to the residual ripple of the bias current that is generated by the panel’s driver. Flicker is introduced by the low-cost driver, which provides bias currents that fluctuate in the low frequency range (less than several kilohertz). This significantly reduces the transmitter’s modulation depth. Concurrently, the driver can also introduce an effect that is similar to baseline wander at the receiver if the flicker is not completely filtered out. We also proposed a solution based on digital signal processing (DSP) to mitigate the flicker issue at the receiver side and its effectiveness has been confirmed.

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Visible-light communication using high-power LED panel-lamp and low-complexity MOSFET circuit

et al. 2021

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An AC Input Inductor-Less LED Driver for Efficient Lighting and Visible Light Communication

Cited by 11 publications

References 22 publications

A Sallen Key All Pass Filter for Noise Reduction in Visible Light Communication Systems

A Sallen Key All Pass Filter for Noise Reduction in Visible Light Communication Systems

A 40 Mb/s VLC System Reusing an Existing Large LED Panel in an Indoor Office Environment

Visible-light communication using high-power LED panel-lamp and low-complexity MOSFET circuit

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