TY - GEN
T1 - Krylov algorithms for FEXT cancellation in upstream MIMO VDSL
AU - Zafaruddin, S. M.
AU - Agrawal, Piyush
AU - Prakriya, Shankar
AU - Prasad, Surendra
PY - 2010
Y1 - 2010
N2 - In this paper we show that Krylov subspace techniques are well suited for cancellation of Far End Crosstalk (FEXT) in MIMO Digital Subscriber Lines (DSL). These methods are computationally efficient for large dimensional DSL channel by exploiting special characteristics of the channel without the need of channel inversion. In particular we study the use of Generalized Minimum Residual (GMRES) Krylov iterative receiver, and exploits its ability to converge very rapidly close to the correct solution by initializing the iteration with the output of the Frequency Domain Equalizer (at each TP and tone). Analytical expressions for residuals are derived to demonstrate that the iterative receiver converges in just one iteration.
AB - In this paper we show that Krylov subspace techniques are well suited for cancellation of Far End Crosstalk (FEXT) in MIMO Digital Subscriber Lines (DSL). These methods are computationally efficient for large dimensional DSL channel by exploiting special characteristics of the channel without the need of channel inversion. In particular we study the use of Generalized Minimum Residual (GMRES) Krylov iterative receiver, and exploits its ability to converge very rapidly close to the correct solution by initializing the iteration with the output of the Frequency Domain Equalizer (at each TP and tone). Analytical expressions for residuals are derived to demonstrate that the iterative receiver converges in just one iteration.
UR - http://www.scopus.com/inward/record.url?scp=77952138659&partnerID=8YFLogxK
U2 - 10.1109/ncc.2010.5430228
DO - 10.1109/ncc.2010.5430228
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AN - SCOPUS:77952138659
SN - 9781424463855
T3 - Proceedings of 16th National Conference on Communications, NCC 2010
BT - Proceedings of 16th National Conference on Communications, NCC 2010
T2 - 16th National Conference on Communications, NCC 2010
Y2 - 29 January 2010 through 31 January 2010
ER -