低压电力线信道优化装置改进电路的设计

The Design of the Modified Circuit of Low Voltage Power line Channel Optimization Device

针对低压电力线信道噪声强、线路与负载阻抗失配严重的缺点,本文改进了现有低压电力线信道优化装置,设计了一种由6个分立元件组成的信道优化电路,结构简单,成本较低。在信号频率f≥2MHz的范围内,对其电路结构及性能进行了计算与仿真分析,证明该电路装置不仅能有效滤除来自家电的高频噪声,而且可以实现线路与终端负载的阻抗匹配功能,从而改善信道性能,提高信道容量。

In order to solve the problem of strong noise in low voltage power line channel and serious impedance mismatching between line and load, an optimizing device of low voltage power line channel with only six separate components was designed, a great improvement to most optimizing devices available nowadays. It has the advantage of simple structure and low cost. In the scope of more than 2MHz of signal frequency, the circuit structure and performance of the device was computed and simulated. It was demonstrated that the device not only could filter high frequency noise from home electric appliances, but could implement the function of impedance matching between line and terminal load. Thus, both the channel performance and channel capacity could be improved by this modified device.