Investigation of phosphor-LED lamp for real-time half-duplex wireless VLC system

Yeh, Chien Hung; Chow, Chi‐Wai; Chen, Hsing-Yu; Liu, Chia‐Jyi; Hsu, Dar Zu

doi:10.1088/2040-8978/18/6/065701

Cited by 18 publications

(12 citation statements)

References 23 publications

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“…INTRODUCTION (HEADING 1) As one of the emerging optical wireless communication techniques, the visible light communication (VLC) has drawn considerable attention recently from both the academy and industry [1,2,3]. VLC system usually consists of light emitting diode (LED) and photodiode (PD) as the optical frontend receivers.…”

Section: Imentioning

confidence: 99%

A Noise Mitigation Approach for VLC Systems

Costanzo

Loscrì

Biagi

2019

2019 Global LIFI Congress (GLC)

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Visible Light Communication (VLC) is based on the dual use of the illumination infrastructure for wireless data communication. The major interest on this communication technology lies on its specific features to be a secure, costeffective wireless technology. Recently, this technology has gained an important role as potential candidate for complementing traditional RF communication systems. Anyway a major issue for the VLC development is a deep comprehension of the noise and its impact on the received signal at the receiver. In this work, we present a simple but effective approach to analyze the noise and drastically reduce it through a signal processing method. In order to validate the effectiveness of this analytical approach, we have developed an USRP-based testbed. Experimental results have been carried out by evaluating the symbol error rate (SER) and show the effectiveness of the noise mitigation approach in different interference conditions and at different distance between the transmitter and the receiver.

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Section: Imentioning

confidence: 99%

A Noise Mitigation Approach for VLC Systems

Costanzo

Loscrì

Biagi

2019

2019 Global LIFI Congress (GLC)

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“…In this section, we introduce and investigate the high-speed phosphor-LED VLC system together with real-time half-duplex transmission [13]. Figure 7(a) presents the optical setup of proposed phosphor-LED VLC architecture.…”

Section: Rate Improvement Of Vlc and Real-time Half-duplex Vlcmentioning

confidence: 99%

“…Hence, utilizing the LED devices to combine illumination and wireless visible light communication (VLC) system has interested many advertences for the future lighting and network access markets [9][10][11][12]. Due to the LED-based VLC system without electromagnetic interference (EMI) effect, it also can be employed in wireless communication inhibited areas, such as hospital or aircraft [13][14]. Besides, compared with the red-green-blue (RGB) white-light LED, the white-light phosphor-LED is naturally used for the wireless VLC transmission [15,16].…”

Section: Introductionmentioning

confidence: 99%

“…If the key function of the LED luminary is applied for lighting, it will confront the communication characteristics of optical wireless VLC [26]. Hence, how to use the commercially available white-light LED luminary to optimize both the illumination and communication is important and desirable issue for practical in-home illumination application [6,13].…”

Section: Introductionmentioning

confidence: 99%

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Phosphor-LED-Based Wireless Visible Light Communication (VLC) and Its Applications

Yeh¹,

Chow²

2017

Optoelectronics - Advanced Device Structures

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In this chapter, we review our recent works on the phosphor white-light light-emitting diode (LED)-based wireless visible light communication (VLC) and its applications. This chapter is divided into two sections for introduction. In the first section, in order to enhance the transmission rate in phosphor-LED VLC system, we propose and demonstrate a novel multiband orthogonal-frequency-division-multiplexed (OFDM) modulation format for capacity enhancement. Based on the proposed scheme, various bands of OFDM signals are employed to different LED chips of the LED luminary; it can prevent the power fading and nonlinearity effects of transmission signal. Therefore, the maximum enhanced percentage of VLC data rate is 41.1%. In the second section, we also demonstrate a 71.3-148.4 Mbps phosphor-LED wireless VLC system at the free space transmission distance between 1.4 and 2.1 m. Finally, to understand and demonstrate the real-time LED VLC transmission, a commercial OFDM-based digital signal processor (DSP) is used in the LED transmitting side and client side, respectively. Therefore, the proposed real-time half-duplex VLC system can complete around 70 Mbps downstream and upstream traffic throughputs, in a free space transmission distance of 2 m long for practical in-home illumination and smart city applications.

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“…The optical wireless communication using LED for both illumination and communication is called as visible-light communication (VLC). VLC technologies are considered as a supplement technology for RF communication because of the advantages such as huge amount of unregulated bandwidth, communication security, hazardless to humans and license-free [1][2][3][4][5][6]. VLC system usually consists of light emitting diode (LED) and photo-diode (PD) as the optical front-end devices.PIN PD or avalanche PD is used as an optical sensor in the conventional VLC system with a suitable biasing circuitry and trans-impedance amplifier (TIA) [7][8].…”

Section: Introductionmentioning

confidence: 99%

Receiver Intend to Reduce Ambient Light Noise in Visible - Light Communication using Solar Panels

Sindhubala¹,

Vijayalakshmi²

2017

JESTR

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In the recent years, optical wireless communication using light emitting diode (LED) has increased lot of interest among researchers popularly known as visible-light communication (VLC). In such VLC system, an optical sensor used in the receiver side converts the modulated light signal into electrical signal. Conventionally, photo-diode (PD) is used as an optical sensor to serve this purpose. Instead of photo-diode, solar panel can be used as an optical sensor as it has the advantages of large collection area, easier targeting of light from an optical source, requires no external power supply and it shuns the reqirement of trans-impedance amplifier (TIA). However, ambient light noise due to indirect sunlight and fluorescent light is a major concern that affects the performance of the communication system in an indoor environment. In this paper, a new design of VLC receiver to reduce ambient light noise using solar panels is proposed. Experimental results show that the proposed receiver is capable of reducing ambient light noise caused by indirect sunlight and fluorescent lamp in an indoor environment. The implemented VLC system is capable of operating at 5.78 kHz and transmission distance of 0.40m is achieved.

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Investigation of phosphor-LED lamp for real-time half-duplex wireless VLC system

Cited by 18 publications

References 23 publications

A Noise Mitigation Approach for VLC Systems

A Noise Mitigation Approach for VLC Systems

Phosphor-LED-Based Wireless Visible Light Communication (VLC) and Its Applications

Receiver Intend to Reduce Ambient Light Noise in Visible - Light Communication using Solar Panels

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