Mitigation of electromagnetic field radiated by PLC systems in indoor environment

Korovkin, Nikolay; Marthe, E.; Rachidi, Farhad; Selina, E.E.

doi:10.1002/dac.595

Cited by 17 publications

(7 citation statements)

References 2 publications

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“…From Equation (5) to Equation (28), we can see that the joint probability of the envelop is a function of the variable !T D . From Equation (5) to Equation (28), we can see that the joint probability of the envelop is a function of the variable !T D .…”

Section: The Memory Order Of the Power-line Communication Channelmentioning

confidence: 99%

“…According to the information provided in the previous text, we make a simulation based on Matlab. From Equation (5) to Equation (28), we can see that the joint probability of the envelop is a function of the variable !T D . The value of !T D has been chosen form 0 to 120 that are typical values encountered in practical PLC channel according to the paper [38], which the carrier frequency f 0 is ranging from 0 -30 MHz and the time delay spread is ranging 0.1 2.0 s. The range of received envelope is partitioned into S intervals that are equal to states in FSMC.…”

Section: The Memory Order Of the Power-line Communication Channelmentioning

confidence: 99%

“…Because of its minimal new infrastructure to deploy [5], power-line communication (PLC) has recently appeared as one of the promising technologies that could potentially be used in such a communication infrastructure for the home area networks, where each wired device is connected in home area, and for the neighborhood area networks, where home gateways neighboring are connected into the wide area networks, in smart grid [6].…”

Section: Introductionmentioning

confidence: 99%

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Research on the memory order of the power‐line communication channel

Zhai

2014

Int J Communication

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As a memory channel, power-line communication (PLC) channel can be modeled by the finite states Morkov model. The memory order in an finite states Morkov model is a key parameter, which is not solved in PLC systems yet. In the paper, the mutual information is used as a measure of the dependence between the different symbols, treated as the received scalar network analyzer, or amplitude of the current channel symbol or that of previous symbols. The joint distribution probabilities of the envelopes in PLC systems are computed based on the multi-path channel model, which is commonly used in PLC. With the first-order Markovian assumption, we confirm that given the information of the symbol immediately preceding the current one, any other previous symbol is independent of the current one in PLC systems. The field test is also performed to model the received OFDM signals with the help of autoregressive model. The results show that the firstorder autoregressive model is enough to model the fading channel in PLC systems, which means the amount of uncertainty remaining in the current symbol should be negligible, given the information corresponding to the immediately preceding one. POWERLINCE COMMUNICATIONS FIRST-ORDER MARKOV CHANNELS 1069 noisy communications channel, which isn't favorable for the high-frequency communications signal transmission with frequency ranging 0 -30 MHz [7].Because of its ubiquity of already existing electrical power delivery networks, PLC is susceptible to numerous appliances and power networks [8]. Several studies have shown that the PLC channel is impaired by different types of noise, which are mostly produced by the electrical appliances in the networks [9]. The isolator switching or breaker in the grids can cause impulse noise [10]: The broadcast transmitters operating at frequencies higher than a few hundred kilohertz, can ingress the narrow band noise, mostly amplitude modulated sinusoidal signals [11,12]; The switching actions of silicon-controlled rectifier diodes found in many electrical appliances, brush motors, dimmer switches, and industrial sources directly connected to the supply network can cause periodic impulsive noise synchronous to the mains frequency [13]; The switched-mode power supplies can result periodic impulsive noise asynchronous to the mains frequency, with a short duration, random occurrence, and a high-power spectral density [14]; Switching transients in the power network can cause asynchronous impulsive noise.Because the impulsive noise is actually produced by appliances in the power network, the powerline noise can also be regarded as a combined sum of the background noise and the impulsive noises from all nearby appliances [15]. In addition to the behaviors of appliances, channel characteristics between the noise sources and a receiver may vary synchronously to the mains voltage [16]. This channel fluctuation also causes the periodic features of the noise [17]. As a result, PLC channels can be seen as typical noisy channels.Like other noisy channels, the PLC chan...

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Section: The Memory Order Of the Power-line Communication Channelmentioning

confidence: 99%

Section: The Memory Order Of the Power-line Communication Channelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Research on the memory order of the power‐line communication channel

Zhai

2014

Int J Communication

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“…An active mitigation technique to reduce the electromagnetic emissions from indoor PLC networks was proposed by Korovkin et al [2]. Korovkin et al's technique uses destructive interference to reduce emissions levels by injecting a 1800 out-of-phase version of the PLC wanted signal into the otherwise unused ground-neutral circuit.…”

Section: Introductionmentioning

confidence: 99%

On the Impact of Mitigating Radiated Emissions on the Capacity of PLC Systems

Vukicevic

Rubinstein

Rachidi

et al. 2007

2007 IEEE International Symposium on Power Line Communications and Its Applications

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An active technique to achieve reduction of emissions from PLC networks is presented based on intentional destructive interference by injection of an appropriately selected auxiliary signal into the otherwise unused ground-neutral circuit.Practical application hurdles are discussed. A strategy for the application of the technique in light of the discussed obstacles is presented. It is argued that, to lower implementation costs and due to the low number of impairing interference situations expected, the present active mitigation technique can be used only when a customer files a complaint or when the lowering of emissions is warranted to achieve higher transmission rates.A change based on a "measure at one point, mitigate everywhere" notion is proposed to facilitate the technical implementation of the technique and to lower installation costs. This modification allows a required antenna to be installed in the PLC modems themselves or at a very short distance to them. Simulation results show that the solution is viable.It is also shown that the use of mitigation techniques, even in the cases in which emission limits are not exceeded, can increase the overall Shannon capacity of the network by many tens of Mbps.

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“…1. An EMI mitigation method of introducing an auxiliary signal to complement the existing PLC signal on the power line network was recently proposed in [60]. The idea is to take advantage of the presence of the ground conductor to inject a 180° out-of-phase version of the useful PLC signal into the neutral-to-ground wires as shown in Fig.…”

Section: Recommendations For Further Researchmentioning

confidence: 99%

Development of power line communication systems with low electromagnetic radiation

Ashari.¹

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It gives me great pleasure to express my gratitude to all those who gave me the possibility to complete this thesis. I am especially deeply indebted to my supervisor, Associate Professor See Kye Yak, the Deputy Head of the Division of Circuit and System, School of Electrical and Electronic Engineering, whose help, stimulating suggestions and encouragement helped me in all the time of research and the writing of this thesis. I would also like to take this opportunity to thank the Director of the Network Technology Research Centre, Associate Professor Shum Ping, for providing financial support in the form of a research scholarship. I have furthermore to thank Associate Professor So Ping Lam, the Program Director of the Power Line Communication Research Group in the Network Technology Research Centre, for his invaluable guidance, assistance and encouragement throughout my research. My special thanks to research engineers, Mr. Manish Oswal and Mr. Wang Lin Biao, for all their help, support and valuable hints. I would also like to extend my special thanks to my fellow postgraduate research student, Mr. Pang Teng Seng, for his generosity in sharing with me all his knowledge and resources on the characteristics of the power line distribution network. I would also like to express my appreciation to the Network Technology Research Centre technical staff; Mr. Poh Khoon Yong, Madam Thung Lina, Madam Wee-Chew Lee Foong Annie and Mr. Chong Lui Tat Anthony, and also to the technical staff in the Electronic Laboratory II; Madam Koh Guek Hwa, Mr. Wee Seng Khoon and Mr. Tan Hoon Kang, for their technical support and assistance in providing all the necessary equipment in making this research a success. Last but not least, I would also like to give my special thanks to my parents, Mr. Ashari bin Sariman and Madam Kamariah bte Hussein, for their love and unfailing support during my postgraduate study in the Nanyang Technological University. Special tribute goes to my two brothers, Mr. Muhammad Azrine and Mr. Abdullah, whose courage and perseverance in their respective lives have inspired me to continuously pursue excellence in my line of work.

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Mitigation of electromagnetic field radiated by PLC systems in indoor environment

Cited by 17 publications

References 2 publications

Research on the memory order of the power‐line communication channel

Research on the memory order of the power‐line communication channel

On the Impact of Mitigating Radiated Emissions on the Capacity of PLC Systems

Development of power line communication systems with low electromagnetic radiation

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