Understanding digital subscriber line technology
Understanding digital subscriber line technology
DSL Advances
EURASIP Journal on Applied Signal Processing
Cooperative MIMO for alien noise cancellation in upstream VDSL
ICASSP '09 Proceedings of the 2009 IEEE International Conference on Acoustics, Speech and Signal Processing
Spatial correlation of alien crosstalk in MIMO DSL systems
IEEE Transactions on Communications
The fourth generation broadband concept
IEEE Communications Magazine
A Near-Optimal Linear Crosstalk Canceler for Upstream VDSL
IEEE Transactions on Signal Processing
IEEE Transactions on Signal Processing
Multiuser soft interference canceler via iterative decoding for DSL applications
IEEE Journal on Selected Areas in Communications
Vectored transmission for digital subscriber line systems
IEEE Journal on Selected Areas in Communications
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We propose the use of an iterative receiver based on the Space Alternating Generalized Expectation maximization (SAGE) algorithm for crosstalk cancellation in upstream vectored VDSL. In the absence of alien crosstalk, we show that when initialized with the frequency-domain equalizer (FEQ) output, the far-end crosstalk (FEXT) can be cancelled with no more real-time complexity than the existing linear receivers. In addition, the suggested approach does not require offline computation of the channel inverse and thus reduces the receiver complexity. In the presence of alien crosstalk, there is a significant gap between the rate performance of the linear receivers as compared with the single-user bound (SUB). The proposed receiver is shown to successfully bridge this gap while requiring only a little extracomplexity. Computer simulations are presented to validate the analysis and confirm the performance of the proposed receiver.