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The automatic meter reading (AMR) system has become a pivotal research area in many building environment cases. One major opportunity to carry out the data transmission within AMR system is power line communication (PLC). PLC provides an attractive solution for data communication and interoperability of the meter reading requirements. This paper shows the results of the data transmission measurements...
The upcoming HomePlug AV standard enables power line communication (PLC) networks to transmit high quality video streams applicable for various video on demand and video relay services in digital homes. However, video streaming over power lines is sensitive to the interference caused by electrical appliances and to the degradation of quality of service (QoS) caused by the increase of transmission...
This paper considers the use of in-building electrical wiring in as the communication channel for the deployment of telephony system for homes and small businesses in Jamaica. The paper presents the design considerations and implementation of the analog electronic interface to the power line infrastructure and presents results from actual powerline channel measurements in a laboratory setting as well...
Due to the fact that power lines are not designed for data transmission, power distribution grids are hostile to transfer high frequency communications signals, which lead to the fact that channel characteristics of power lines are very important for communications systems design. In this paper, the measurements of channel properties of power line communications networks in China are presented and...
The following topics were dealt with: power line communications and applications; telecommunication channels; broadband networks; power systems; video streaming; modulation and coding; MC-CDMA; and indoor communications
This paper describes the main experimental results that have been obtained with a prototype system developed within a Craft project in the EU Growth Programme: WireNet-"powerline data exchange for domestic and industrial automation based on the ultra wide band (UWB) approach". The project aimed at designing and realising an innovative system for power-line data exchange using some concepts...
This paper brings into focus the need for a systematic approach to qualify in-house powerline equipment and networks for audio and video (AV) streaming applications. We present a simple isolated powerline network, suitable as a basic reference network for AV application tests, and elaborate on the possibility to extend this into a more complex AV reference network. The basic quality of service (QoS)...
In this paper, the results of field testing of high-speed powerline in-home networking in a large number of homes in North America are reported. The effects of cross-phase coupling are reported, and the characteristics of the most significant impairment identified during the testing are studied
Measurements of emissions are carried out over a low voltage (LV) indoor power line system in the frequency range of 1 MHz - 30 MHz. In the measurement setups, efforts are made to comply with the setup specified in the existing standards. The results obtained are compared to the current regulations/proposed limits. It is shown that the measured emissions do not currently meet all the specified limits...
Early experiments in India have succeeded in transmitting 200-500 MHz UHF/VHF signals over aerial MV lines (11-66 KV). This paper summarizes the work done in the process - theoretical and experimental. We extend the quasi-TEM analysis to include radiation losses at VHF/UHF frequencies. The results indicate that certain quasi-TEM modes have very low attenuation, even with radiation included. We also...
Irregular low-density parity-check coding is studied for frequency selective channels and discreet multi-tone (DMT) systems that are used for power-line channels. To let a long block-length code with a practical buffer delay, we protect all the symbols that are transmitted in a DMT symbol with one code. The main challenge, therefore, is the varying signal to noise ratio in different frequency tones,...
Error rate simulations under AWGN environment are made for a MMFSK (M-ary multilevel FSK) system, which use a novel hopping pattern synthesis method named even-odd discrimination method. There can be found great many number of systems for a MMFSK system using even-odd discrimination method depending on the system parameters such as number of chips, number of levels, and the selection of basic hopping...
This paper analyses the four-wire cables which is necessary to the power line communication. It presents a novel approach to model the power line cables through the per-unit-length parameters. In this approach, different effect caused by surrounding are considered, the calculated results are compared with the measurements performed on the power line cables. The paper also describes the experiment...
In this paper, we presented our latest measurement results of both channel attenuation and noise within the frequency range of 1-40 MHz. Results show both attenuation and noise characteristic are quite stable, not changing drastically with time. The attenuation increases with the increase of frequency while the noise level drops with the increase of frequency. This means the channel can naturally...
Three different types of non-binary error correction codes and an M-FSK modulation scheme were combined to correct narrowband interference in power line communications. Specifically, non-binary convolutional codes, permutation trellis codes and Reed-Solomon codes were combined with the M-FSK modulation scheme. We present in this paper results on these different coding techniques when used to correct...
This manuscript discusses the relationships of noise waveforms measured at different outlets in a three-wire single-phase (one neutral and two live conductors) power-line network. As a result of experimental measurements, it is confirmed that instantaneous noise voltages at two different outlets have high correlations if the outlets are connected to the same live conductor in a distribution board,...
This paper examines fundamentals of signal propagation over low-voltage (LV) bare conductor power lines. It is well known that power line carrier (PLC) signals are highly attenuated by load impedances. In this paper high frequency propagation over distribution lines is modeled using the electromagnetic power system transients program (EMTP). A sample distribution system is analysed for different load...
In a network of three or more transmission lines connected together at a common "star" point, signals encounter a large transmission discontinuity that impairs communication. Part of an incident signal is reflected backward and the remaining portion is split amongst the outgoing lines. For example, when 6 lines with equal impedances are connected together, ongoing signals are attenuated...
This paper deals with a variable rate discrete multi-tone modulation communication system for broadband power-line communications, based on the turbo coding and bit-loading algorithms. The proposed system can be seen as an enhancement of the HomePlug 1.0 system. The performance of the system, expressed in terms of bit-rate and bit error rate (BER), is derived by simulation under the assumption of...
Home networking is one of the most popular applications of power line communication (PLC) technologies. In the future, home networks will be required to simultaneously support both data and multimedia traffic. Unlike data, multimedia traffic requires guarantees on quality of service (QoS). The recently release HomePlug Standard, HomePlug AV (HPAV), uses a beacon based time division multiple access...
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