Computationally efficient approximated matrix inversion with application to crosstalk precoding in downstream VDSL

Authors:
Youming Li;Leshem Amir;Liming Fang
Affiliations:
Ningbo University, Ningbo, China;Bar-Ilan University, Ramat Gan, Israel;Huawei Technologies Co. Ltd, Shenzheng, China
Venue:
IWCMC '07 Proceedings of the 2007 international conference on Wireless communications and mobile computing
Year:
2007

Citing 3
Cited 0

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Abstract

An algorithm for approximating crosstalk channel matrix inversion is proposed in this paper. The algorithm decomposes the crosstalk channel matrix into a tridiagonal matrix plus a residual matrix composed of the remaining elements. By using diagonal dominance property, the inverse of the crosstalk channel matrix is approximated. Based on these results we propose a novel precoding method with lower computational complexity for canceling the crosstalk in downstream VDSL. Computer simulation results based on measured channel data are provided to verify the efficiency of the proposed algorithm.