Improving PLC to DSL Interference Mitigation Methods by Considering Mode Conversion Effects

The DSL technologies are expected to face many interferences in conventional deployments, such as RFI. One way to mitigate the destructive effects of RFI is to use the correlation between the RFI observed in differential mode and the RFI observed in common mode. This strategy is considered in many works found in the literature. However, they do not show how to overcome the impairments caused by the signal that leaks from the differential to common mode (mode conversion), which causes a considerable performance decrease. The work presented here shows how to overcome the conversion mode impairment, through a simple adjustment in the current common mode based PLC mitigation methods. Additionally, we show the impact of the mode conversion in the conventional methods, and the SINR improvement achieved by our method.