Error Correcting Scheme for Road-to-Vehicle Visible Light Communication using LED Array

Abstract

In this paper, we propose an improved coding scheme for optical wireless communication systems using a LED array transmitter and a high-speed camera as the receiver on a vehicle. Previously, we have proposed a hierarchical coding scheme which allocated the data to spatial frequency components depending on the priority. In that scheme, the high-priority data can be received even if the receiver was far from the transmitter. We confirmed the advantage of the hierarchical coding scheme, but the bit error performance was not sufficient. In this paper, we divide the data into spatial frequency components, and use error correcting code for each spatial frequency components' data. Experimental evaluation demonstrates the improvement in BER performance. This improvement implies that the system range increased compared to the previous method.

Portable Mbps point‐to‐point OOK‐NRZ visible light communication devices based on white light‐emitting diode illuminant

“…An overview of the technical constraints and challenges for VLC links can be found elsewhere [1–5]. Many researches have been carried out in the aspects of modulation, key technology, lighting layout, hardware and equipment, etc, and much progress has been made in such areas [6–8]. Compared with orthogonal frequency division multiplexing [6, 9], the on‐off‐keying (OOK) nonreturn‐to‐zero (NRZ) modulation is constrained by the ability of multipath interference suppression.…”