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

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

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International Conference On Communications And Mobile Computing archive
Proceedings of the 2007 international conference on Wireless communications and mobile computing table of contents

Honolulu, Hawaii, USA

SESSION: MIMO systems symposium: detection and estimation table of contents

Pages: 429 - 433

Year of Publication: 2007

ISBN:978-1-59593-695-0

Authors

Youming Li	Ningbo University, Ningbo, China
Leshem Amir	Bar-Ilan University, Ramat Gan, Israel
Liming Fang	Huawei Technologies Co. Ltd, Shenzheng, China

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ACM: Association for Computing Machinery
SIGDOC : ACM Special Interest Group on Systems Documentation
SIGWEB: ACM Special Interest Group on Hypertext, Hypermedia, and Web
SIGAPP: ACM Special Interest Group on Applied Computing

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ACM New York, NY, USA

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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.

REFERENCES

Note: OCR errors may be found in this Reference List extracted from the full text article. ACM has opted to expose the complete List rather than only correct and linked references.

	1	G. Ginis and J. Cioffi, "Vectored transmission for digital subscriber line systems," IEEE Journal on Selected Areas in Communications, vol. 20, pp. 1085--1104, June 2002.
	2	E. V. d. B. R. Cendrillon, G. Ginis and M. Moonen, "A near-optimal linear crosstalk canceler for upstream VDSL," IEEE Trans. Signal Processing, vol. 54, pp. 3136--3146, Aug. 2006.
	3	A. Leshem and L. Youming, "Low complexity coordinated fext cancellation for VDSL," in IEEE Conf. Electronics, Circuits and Systems, Israel, pp. 338--341, Nov. 2004.
	4	A. Leshem and L. Youming, "a low complexity linear precoding technique for next generation VDSL downstream transmission over copper," in IEEE Trans. Signal Processing (accepted for publication).