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

Abstract

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.

Breaking the limitations of visible light communication through its side channel

“…This intense ambient light can quickly saturate the receiving "antennas" (i.e., photodiodes) at the VLC receiver. Many recent works have been proposed to combat the above limitations of VLC [10,32,39]. To address the blockage issue, a denser deployment that could make sure there always exists a line-of-sight link between the VLC transmitters and the receiver is proposed [4,5].…”

“…Ambient light can saturate the photodiode of the receiver. Various solutions have been proposed to solve the saturation issue [10,32,39]. For example, a narrow optical band-pass filter is used to only pass the light of intended frequency band [10], and a less sensitive photodetector or solar cells [32] are adopted to avoid being saturated when the ambient light is strong [39].…”

“…Various solutions have been proposed to solve the saturation issue [10,32,39]. For example, a narrow optical band-pass filter is used to only pass the light of intended frequency band [10], and a less sensitive photodetector or solar cells [32] are adopted to avoid being saturated when the ambient light is strong [39]. Although these methods mitigate the interference to some extent, they sacrifice the large visible light frequency band [10] or can only work when ambient light is not strong [39].…”

Photovoltaic Solar Cells for Outdoor LiFi Communications

“…Most of outdoors optical communications (called FSO for Free-Space Optical communication) use laser-emitters, and some of them use a PV receiver [13], [14], [15]. However, to the best of our knowledge, only a few publications address LED-based VLC with PV modules as receivers [16], [17], [18], [19], [20], and none shows a data communication in real outdoor conditions. This work compares experimental performance obtained by a PV-based receiver and a PD-based receiver with a large range of solar irradiation levels and without any lens or color filter to improve the strength of the information signal.…”

LiFi Reception from Organic Photovoltaic Modules Subject to Additional DC Illuminations and Shading Effects

“…The possibility of using photovoltaic (PV) modules for visible light communications (VLC) is still relatively new [1]- [5] and the main expected benefits are to ideally obtain a self-supplied LiFi receiver [6], [7] operating outside and coupled with a large and flexible reception area. Remarkably, the use of organic solar cells as receiver for VLC has been demonstrated [4].…”