Estudo da Interferência do Sistema PLC no DSL

Abstract

Resumo-Este trabalho visa analisar o impacto da interferência provocada pelo sistema Power Line Communication (PLC) no sistema Digital Subscriber Line (DSL). Para tal, é apresentado um modelo analítico, capaz de estimar a intensidade do campo elétrico provocado pela linha de transmissão do sistema PLC. Posteriormente, é analisado o impacto que esse campo provoca na linha DSL operando nas proximidades. Este estudo foi feito através da ferramenta de simulação MATLAB. Os resultados mostram que os níveis de radiação provocados pelo sistema PLC poderão provocar perdas na capacidade do canal e erros na transmissão do sistema DSL. Por fim, concluiu-se que a frequência de operação do sistema PLC e o comprimento do acoplamento entre as linhas de transmissão causam maior impacto na perda da capacidade do sistema DSL. Além disso, a variação dos níveis de modulação Quadrature Amplitude Modulation (QAM), não provoca grande efeito para a minimização do impacto da interferência provocada pelo sistema PLC.

Frequency re-use distance calculation in cellular systems based on Monte-Carlo simulation

“…There is just 25 MHz and 75 MHz transmission capacity accessible in GSM 900 and 1800 MHz respectively [1, 2]. Hence, expanding interest for the current radio application and the presentation of another applications have made a major test in radio frequency asset management [1, 3, 4]. The cellular idea was a landmark in taking care of the issue of spectrum congestion and client capacity [1, 4, 5].…”

“…While statistical analysis based on MCS would give ideal spectrum usage than analytical method since MCS uses a given realistic deployment scenario to establish a probability of interference between victim link and interfering link in the same band or adjacent band [7]. MCS uses a repeated random generation of victim link, interfering link and their parameters [3, 8, 9]. After numerous trials (i.e.…”

“…it is user-defined), not only unfavorable but also favorable case will be accounted and the resulting rules will be fairer than the analytical method. Therefore, spectrum utilization using the MCS is ideal than the analytical method [3, 7, 10, 11].…”

“…The MCS has also been used to study interference in [3, 8, 9, 11, 12]. The interference causes degradation of the performance on the victim link receiver system causing a reduction in the data transmission rate, especially for victim link receiver near the edge of the victim link transmitter coverage area [1, 4, 8, 13].…”

“…The interference causes degradation of the performance on the victim link receiver system causing a reduction in the data transmission rate, especially for victim link receiver near the edge of the victim link transmitter coverage area [1, 4, 8, 13]. Interference has been recognized as a major bottleneck in increasing the capacity of a radio system and is often responsible for dropped calls [1, 2, 3, 4, 5, 11, 12]. Therefore, this problem cannot be ignored.…”