NDLI: Adaptive Off-Diagonal MIMO Pre-Coder (ODMP) for Downstream DSL Self FEXT Cancellation

Content Provider	IEEE Xplore Digital Library
Author	Duvaut, P. Mahadevan, A. Sorbara, M. Langberg, E. Biyani, P.
Copyright Year	2007
Description	Author affiliation: Conexant Syst. Inc., Red Bank (Duvaut, P.; Mahadevan, A.; Sorbara, M.; Langberg, E.; Biyani, P.)
Abstract	This paper introduces a new family of per frequency linear pre-coders, called off-diagonal MIMO pre-coders (ODMP), for discrete multi-tone (DMT) based digital subscriber line (DSL) systems. ODMP target pre-compensation of the off- diagonal self far-end cross talk (FEXT) terms in the downstream DSL-MIMO channel matrix. We derive a low complexity and adaptive ODMP that simultaneously maximizes the Shannon Capacities per tone, experienced by the (non-cooperative) end-users. The updating scheme makes use of the error samples computed in each receiver. No matrix inversion is required in the algorithm which may be used for learning, tracking, and incrementing the ODMP without any disruption of data service. Finite precision simulation results reveal that coding the complex error with 16 bits allows for the algorithm to reach "self-FEXT free" performance after only 150 iterations in the learning phase and 450 iterations in the incrementing phase.
Starting Page	2910
Ending Page	2915
File Size	154713
Page Count	6
File Format	PDF
ISBN	9781424410422
DOI	10.1109/GLOCOM.2007.551
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-11-26
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	MIMO DSL Frequency Optical arrays Optical network units Bandwidth OFDM modulation Computational modeling Multicast algorithms Crosstalk
Content Type	Text
Resource Type	Article

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