Quantitative analysis of different LED lamp configurations in indoor VLC system

Abstract

Summary In this article, an indoor environment of 5 × 5 × 3 m3 dimensions is considered and a total of nine LED lamps are installed at the ceiling in a symmetrical pattern. The inter‐spatial separation between LED lamps is varied to achieve the dual purpose of lighting and communication services. The multipath channel impulse response for distinct receiver locations is also calculated under line‐of‐sight (LOS) and non‐line‐of‐sight (NLOS) channel conditions. Several performance parameters, that is, illumination uniformity, received power fluctuations, root‐mean‐delay spread (RMDS), are evaluated to estimate the performance of the proposed system. The results show that spatial separation of 1.5 m between the LED lamps outperforms the other considered spatial separations, and the error‐free data transmission rate for the proposed system comes out to be about 40 Mbps across the entire receiver plane. Furthermore, an RGB image is transmitted at 40 Mbps and the received image quality is estimated in terms of image quality parameter, that is, structure similarity index (SSIM) over the receiver plane. The results outlined that the received image shows 100% similarity with the transmitted image, and thus, the proposed system can be effectively deployed in practical indoor environments.

Three-Dimensional Division of Visible Light Communication Irradiation Area

“…Related studies have shown that the improvement of communication channels helps to enhance the communication performance of the system. Both LOS channels and non-LOS (NLOS) channels are analyzed in the literature [ 33 , 34 , 35 ]. Mohanna et al [ 33 ] analyzed the effect of reflected light from walls on the receiver side by simulating a LOS channel and an NLOS channel.…”

“…Mohanna et al [ 33 ] analyzed the effect of reflected light from walls on the receiver side by simulating a LOS channel and an NLOS channel. By arranging multiple LEDs in both LOS and NLOS channels, Priyanka et al [ 34 ] improved the uniformity of light illumination within the communication channel and mitigated the effect of inter-symbol interference. Long [ 35 ] researched the performance evaluation of a VLC system with various FOVs, elevation and azimuth receivers by simulating LOS and NLOS models.…”