Hybrid PLC‐VLC channel model and spectral estimation using a nonparametric approach

Abstract

Telecommunication engineering may substantially benefit from the integration of power line communication (PLC) and visible light communication (VLC) technologies. This integration is enabled firstly by the ubiquitous nature of PLC and VLC infrastructures and secondly by the recent advances made in both technologies, and it will be effective with the knowledge of the cascaded PLC‐VLC channel. This paper reports on the spectral analysis and estimation of the dual channel for hybrid systems involving PLC and VLC technologies. The channels are statistically analysed using the nonparametric windowed Welch method. Experimental results giving varieties of simulated PLC‐VLC channel are presented. They show the influence of the number of taps (PLC side) and the line‐of‐sight and the non–line‐of‐sight gains (VLC side) on the PLC‐VLC frequency response. It also indicates that the cascaded channel is influenced by propagation distance and room area. We also show the influence of PLC and VLC channel parameters on the gain and notches.

Hybrid trellis coded modulation (HTCM) for visible light communications

“…The noise carried over from the backbone network depends on the technology considered. For example, if the backbone network is based on PLC technology, it then is expected to be carried over impulsive noise, narrowband noise and background noise [5]. In this scenario, some noise sources generate Gaussian distributed noise signals while some are non-Gaussian.…”

“…This requires a different communication technology to supply VLC, which will be used to connect the end user. This additional communication technology represents a pivot network for the VLC channel [1,[5][6][7][8][9]. RF, power line communications (PLC) and fibre optics (FO) are examples of technologies that may serve as a backbone for VLC.…”

Transmitter power control for a multicarrier visible light communication system

“…Consider a WDM RGB‐LED VLC system with additive white Gaussian noise channel, as shown in Figure . The transmission is governed by Equation where H is the 3×3 channel transfer matrix and N is the subchannel noise vector. r and s are 3×1 column vectors that represent the received and transmitted symbols, respectively.…”

Visible light communication – An architectural perspective on the applications and data rate improvement strategies

“…The future wireless networks are expected to have many folds increased capacity, gigabit data rates, and extremely low latency. These demands can be met by incorporating dense and smaller cell size, utilization of new spectrum, and capability to integrate various networks (heterogeneous networks – HetNets) . The aforementioned advantages of VLC makes it a favorable choice for future generation networks.…”

“…These demands can be met by incorporating dense and smaller cell size, utilization of new spectrum, and capability to integrate various networks (heterogeneous networks -HetNets). 7 The aforementioned advantages of VLC makes it a favorable choice for future generation networks. Furthermore, RF and VLC can coexist in 5G networks, thus benefitting from the salient features of RF (seamless coverage) and VLC (high data rates).…”