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The following topics are dealt with: power line communication; smart home; smart grid; noise and interference immunity; relay transmission; channel characterization; electomagnetic compatibility; access control protocols and; modulation.
The Power Line Communication (PLC) technique utilizes the available electricity power line for the transmission of the communication signal. A PLC network is configured as one or several clusters; each is a master-slave system, called PLC-cell. The transmission resource allocation problem between the PLC-cells is investigated in this paper. Because of the channel quality, e.g. impacted by noise injection,...
While in-home and access technologies are located at different places in the end-to-end communication chain, they have been shown to mutually interfere. In this contribution, we quantify the mutual impact of an in-home network and a Digital Subscriber Line access link. Both regular and vectored VDSL2 links are considered. For newer in-home technologies, which are able to use a large bandwidth, the...
This paper presents a detailed concept of a very flexible Field Programmable Gate Array (FPGA)-based powerline channel emulator. Several emulation scenarios, e. g. MIMO-PLC (Multiple Input Multiple Output), neighborhood network, hidden node or VDSL (Very High Speed Digital Subscriber Line) coexistence scenarios will illustrate the need of such an emulator. Furthermore, the paper describes the data...
We investigate the use of impulsive ultrawide band (I-UWB) modulation over medium voltage (MV) power line channels for low data rate communications. In particular, we consider a MV network where a channel measurement campaign has been carried out. In this paper, we firstly describe the MV test network. We study the statistics of the MV channels in terms of both root-mean-square delay spread (RMS-DS)...
Power line communications (PLC) play an important role in smart grid for its cost efficiency. However, the power line is not designed for communication purposes so that its communication environment is hostile with formidable obstacles such as frequency selective fading and impulsive noise. A number of existing methods have been used to deal with the challenges of PLC. Nevertheless, most of existing...
Impulse noise (IN) is one of the major impairments for data transmission over power lines. For power line communications (PLC) systems with bandwidths in the high kHz to MHz range, IN occurs in bursts. As long as those bursts are sufficiently short compared to a signal-processing (e.g. coding) frame, there is hope to successfully mitigate IN. In this paper, we introduce a new IN mitigation technique...
Multiple-Input Multiple-Output (MIMO) techniques have recently become an important research field for enhancing the performance of in-home Power Line Communication (PLC) systems by exploiting the additional Protective Earth wire. The development of such systems requires an accurate description of the propagation channel. This paper presents a statistical model for the MIMO PLC channel, based on an...
In this paper a statistical description of in-home MIMO power line channels is derived, based on channel measurements in the 0 to 100 MHz range. In particular, it is shown that the power delay profile has a statistical distribution that could be well described by Weibull and Gaussian distributions. It is also confirmed that the channel attenuation has a linear behavior as a function of the frequency...
Inhome Power Line Communications (PLC) enables new and highly convenient networking functions without any additional wires to mains-powered devices. Multiple Input Multiple Output (MIMO) methods significantly improve the coverage of guaranteed data throughputs in private homes. This paper gives an overview on MIMO PLC. The results from the channel measurements motivate to implement a MIMO PLC feasibility...
Multiple Input Multiple Output (MIMO) methods significantly improve the coverage of Power Line Communications (PLC) compared to Single Input Single Output (SISO) systems. This paper describes the implementation and results of the first real-time MIMO PLC feasibility study. Our system setup includes two PCs, each containing two FPGAs. It enables the comparison of SISO versus MIMO PLC transmissions...
In this paper we study the characteristics of in-home multi-input multi-output (MIMO) power line channels in the 0 - 100 MHz frequency band. Channel measurements are obtained in several US homes by transmitting two independent signals over two wire pairs (line-neutral and line-protective earth) and receiving on all three wire pairs (line-neutral, line-protective earth and neutral-protective earth)...
We propose a bottom-up power line communication (PLC) channel generator that exploits multi conductor transmission line (MTL) theory combined with a random topology generation algorithm to generate statistically representative in-home multiple-input multiple-output (MIMO) PLC channels. We focus on in-home PLC networks that deploy three conductors and thus provide two different circuits sharing the...
In this paper a theoretical and experimental analysis of the time-domain properties of the Power Line Communication (PLC) channel on-board a cruise ship is presented. It is shown that a typical feature of the topology of this kind of naval power networks strongly reduces the time variation of the transfer function for broadband PLC. In particular the topology uses a star configuration, and each electrical...
In this paper the authors consider a real-world set of cables on which Power Line Communication (PLC) signals are transmitted in the power distribution network of a ship. The electrical signals which convey PLC data are carried by unshielded cables and may therefore interact with the external environment and affect the functioning of other devices. On the basis of a set of working assumptions, several...
In this work a procedure for the optimization of the bit loading in a PLC system implementing OFDM modulation is presented. The optimization strategy aims to find the best compromise between Signal Power, Bit Rate (BR), Bit Error Rate (BER) and Peak-to-Average Power Ratio (PAPR). The problem is approached from two points of view. First, the conflicting objectives of Signal Power, Bit Rate and Bit...
The use of powerline communications has attracted the attention of researchers increasingly, since this kind of data transmission allows to reduce the number of cables. This advantage is particularly appealing in railway, naval and aeronautical fields. In this paper a method to detect noisy events that occur in a powerline communication system in a naval environment is proposed. To this aim, a model...
A computer-aided methodology for designing multiport broadband impedance matching circuits (BIM) to be connected at powerline communication (PLC) networks is presented in order to provide gain equalization and mitigation of the effects of low-impedance loads among transmitter and receivers in a wide frequency range. The design is achieved in successive steps by means of the Vector Fitting method,...
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