Concept of Impedance Diversity for Conducted Interference Mitigation

This paper presents the concept of impedance diversity to mitigate the disturbance caused by varying impedances of non-linear loads in the time domain. Simulations were performed in LTSpice to show the concept of the impedance diversity, and measurements were performed using a speed-controlled water pump as the source of interference and PLC modems as the victim. The impact of the interference from the water pump on the PLC modem is quantifiedwith the Frame Error Rate (FER), which is calculated as the ratio between the erroneous frames and total frames sent by the PLC. The measurement result shows that the impedance mode of the PLC modem affects the frame errors caused by the interference from the water pump.