Discussion on the assessment and mitigation of radiation from PLC networks

Rubinstein, Marcos; Bermudez, Jose-Luis; Vekicevic, A.; Rachidi, Farhad; Schneider, Michael J.; Marthe, E.

doi:10.1109/isplc.2005.1430499

Cited by 6 publications

(4 citation statements)

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“…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. Although the technique works well for simple lines, when applied to realistic topologies, its performance drops and, at some frequencies, a worsening of the emissions is observed [3,4,5,6].…”

Section: Introductionmentioning

confidence: 99%

“…Modified method A modification was proposed by Rubinstein et al [5,6] in which, instead of a constant 1800 phase shift, the phase and the amplitude of the auxiliary signal are selected adaptively.…”

Section: Introductionmentioning

confidence: 99%

“…Making HA =O, one can readily show that the compensation signal (expressed as a voltage) is related to the PLC wanted signal by [5,6] The schematic representation of the proposed technique is given in Figure 2. The magnetic field is measured with the loop antenna under different signal injection conditions controlled by the block labeled "Logic" in the figure.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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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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“…Verifica-se em [17] uma proposta para redução das emissões radiadas que consiste em injetar um sinal em oposição de fase de 180°, no sentido de criar uma interferência destrutiva nos locais onde não se deseja a presença de sinais PLC/BPL. Outras técnicas consistem em selecionar a fase do sinal a ser injetado de forma adaptativa [18] [19] [20].…”

Section: Revisão Bibliográficaunclassified

Contribuições metodológicas à implementação da tecnologia PLC/BPL.

Oliveira¹

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Este trabalho tem como objetivo fornecer contribuições metodológicas à implementação da tecnologia PLC/BPL em seus diversos ambientes reais de instalação.São apresentados os aspectos básicos envolvidos, princípio de operação, as topologias das redes PLC, vantagens e desvantagens e exemplos de aplicação.Além disso, são apresentadas as contribuições deste trabalho, as quais visam estabelecer procedimentos no desenvolvimento dos projetos de redes de comunicação que utilizam a tecnologia PLC, assim como procedimentos de instalação nos diversos ambientes reais e os procedimentos para o comissionamento das redes implantadas.São destacados os aspectos relacionados às redes comerciais, as quais possuem inúmeros requisitos de desempenho, manutenção preventiva e/ou corretiva, além dos aspectos financeiros dos projetos e os pontos importantes para atendimento da legislação atualmente em vigor.Finalmente, para cada procedimento apresentado, o mesmo é contextualizado através da apresentação de um caso prático associado.Palavras-chave: Power Line Communications. Broad Band Over Power Lines. Comunicação pela rede elétrica. Metodologia de implantação. Interferência eletromagnética.

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