The design of transceiver impedances is very important to improve the performance of the power line communication (PLC) system. In this study, it infers an expression of signal-to-noise ratio (SNR) related to transceiver impedances for broadband PLCs, and the optimal transceiver impedances are obtained by solving a maximisation problem. By the comparison of the SNR of PLC system with the proposed transceiver impedances and only optimised transmitter or receiver impedance, the conclusions are derived that the PLC system performance with the proposed transceiver impedances is better and the receiver impedance has a greater influence on the performance of the PLC system. To verify the advantage of the optimal transceiver impedances proposed in this study, the authors also make the comparison with the other two kinds of transceiver impedance optimisation methods by simulating SNR and transmission rate of the PLC system. The results show that in theory, the SNR and channel capacity of PLC system ca, maximally increase by 15 dB and 50 Mbits/s, respectively, using the proposed transceiver impedances by comparing with the other two impedance optimisation methods, which proves that the proposed transceiver impedances in this study can obtain the better performance of the PLC system.

中文翻译：

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低压宽带PLC系统的优化收发器阻抗研究

收发器阻抗的设计对于提高电力线通信（PLC）系统的性能非常重要。在这项研究中，它推断出与宽带PLC的收发器阻抗有关的信噪比（SNR）的表达式，并通过解决最大化问题来获得最佳收发器阻抗。通过将PLC系统的SNR与建议的收发器阻抗以及仅优化的发送器或接收器阻抗进行比较，得出的结论是，具有建议的收发器阻抗的PLC系统性能更好，并且接收器阻抗对接收器阻抗的性能影响更大。 PLC系统。为了验证本研究中提出的最佳收发器阻抗的优势，通过模拟PLC系统的SNR和传输速率，作者还与其他两种收发器阻抗优化方法进行了比较。结果表明，从理论上讲，通过与其他两种阻抗优化方法进行比较，使用所建议的收发器阻抗，PLC系统的SNR和信道容量分别分别最大增加了15 dB和50 Mbits / s，这证明了所提出的建议本研究中的收发器阻抗可以获得PLC系统更好的性能。