Abstract
This work focuses on the characterization of indoor hybrid power line communication (PLC)-wireless channels in the frequency band between 1.7 and 100 MHz. These hybrid channels allow the simultaneous exploitation of the ubiquitous PLC channel and the mobility benefits offered by the wireless signals radiating from and being induced into power cables. A comprehensive study and analysis was conducted based on: (i) coherence time, (ii) additive-noise power spectral density, (iii) coherence bandwidth, (iv) delay spread, (v) average channel gain, (vi) channel frequency response and (vii) channel capacity. Based on the reported analysis, the magnitude responses of hybrid PLC-wireless channels can be assumed to be symmetrical and significantly frequency selective. Also, we reveal that additivenoise power spectral density and, consequently, channel capacity differ considerably in the PLC-to-wireless and wireless-to-PLC transmission directions. Finally, we show that the measured PLCwireless channels present a channel capacity of up to hundreds mega bits per second.
Highlights
T HE use of electric power grids to provide data communication has received significant attention
We reveal that additive noise power spectral density and, channel capacity differ considerably in the power line communication (PLC)-to-wireless and wireless-to-PLC
The observed relation for the hybrid PLC-wireless channel is shown in Fig. 6, where the dotted line denotes the case γ = 111, which represents the best fit for short-path channels according to the minimum mean squared error (MMSE) criterion
Summary
T HE use of electric power grids to provide data communication (power line communication - PLC) has received significant attention As these types of systems are entirely based on the existing and ubiquitous electric power infrastructure, significantly reductions to associated implementation costs are achieved in comparison to traditional telecommunications technologies [1]. Different from the aforementioned works, this paper addresses a communication medium established between a PLC device that makes use of the wireline (power cables) to receive/transmit signals with a wireless device, which use the air for data communication. By using the hybrid principle, the electric utility can access information and interact with the electric power grids
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