Low Complexity Hybrid Algorithm for Crosstalk Cancellation

Crosstalk is the major limiting issue in VDSL2 system. A low complexity hybrid algorithm based on diagonal splitting precoder and iterative waterfilling algorithm is proposed in this paper. In this algorithm, crosstalk is mitigated by DS precoder firstly, and discrete iterative waterfilling is then chosen for power allocation. Computer simulation results based on measured data verify that the performance of the new method is almost the same as the optimal hybrid algorithm when the QoS requirements are met, but the new algorithm dramatically reduces the computational complexity.