VDSL2 Interference Mitigation

To address the growing demand for telecommunications infrastructure capacity, Xtendwave has developed a cost-effective solution for achieving increased data throughput in the crosstalk-constrained copper-based residential access and cellular backhaul networks. VDSL2 has become the standard for delivering broadband, triple-play services to consumers. However, despite recent advances in self-crosstalk cancellation using vectoring (ITU-T G.993.5 standard), the performance of vectored VDSL2 is substantially degraded due to un-cancelled alien interference from nearby lines that are either non-vectored or in a separate vectored group. In the case of cellular backhaul and business access, the carriers avoid the use of the spectrally efficient VDSL2 because of its vulnerability to alien interference from legacy single carrier systems such as T1, SHDSL etc. Xtendwave’s technology addresses this vulnerability by effectively mitigating interference, even in the case of strong alien interferers. The company’s key innovation is in non-iterative, reduced-complexity, dynamic interference cancellation algorithms which greatly enhance performance. Xtendwave anticipates that this technology will be widely incorporated in copper-based equipment.

Key features of Xtendwave’s solution:

  • Substantial performance improvements for residential vectored-VDSL2 systems
  • Enables VDSL2 deployment for cellular backhaul in presence of strong alien interference
  • Efficient low latency algorithms, enable cost-effective implementation
  • Ready to be implemented in VDSL modem designs