The impact of PLC-to-DSL interference on VDSL2, Vectored VDSL2, and G.fast

This contribution presents an analysis of the impact of PLC-to-DSL interference on three wideband DSL technologies: VDSL2, Vectored VDSL2 (V-VDSL2), and G.fast. The impact was assessed via computer simulation, but measured loop responses and measured FEXT were also used together with a large set of PLC interference measurements collected from a large number of residential inside wires. The impact of PLC-to-DSL interference on the achievable data rate is assessed at various loop lengths. We have found that the impact of PLC interference on DSL is small on short loops but it grows quickly as loop length increases. We have also confirmed that the use of vectoring greatly increases the sensitivity to PLC interference of DSL technologies, as vectoring removes the time-invariant “blanket” of crosstalk and leaves DSL exposed to PLC interference as well as to other alien noise.