Precoder optimization for DSL with high crosstalk
(2013) Joint WIC/IEEE Symposium on Information Theory and Signal Processing in the Benelux — Location: Leuven (30.May.2013)
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- Abstract
- Next generation DSL systems aim to provide very high data-rates by transmitting at much higher frequencies. Current transmissions go up to 20MHz while transmissions up to 100MHz are considered for G.Fast. At such high frequency ranges, the electro-magnetic coupling between twisted pairs of a binder group, named Crosstalk, becomes very large, sometimes even larger than the direct signal transmitted on the line. Efficient crosstalk precompensation techniques (also called precoding) are thus necessary in order to provide the targeted bit rates. The method exploiting the colocation of the transceivers or receivers in order to cancel the crosstalk is called Vectoring [3]. Various precoding techniques have already been designed for current transmission standards (using a frequency range up to 20-30 Mhz) but all the methods considered up to now use the assumption that Far-End Crosstalk (FEXT) is significantly lower than the signal received by the user. The goal of this paper is to propose and analyze different crosstalk cancellation techniques and compare their efficiency in the special case of very high crosstalk, applicable in the high frequency range.
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Citations
Martin, A., Vandendorpe, L., & Louveaux, J. (2013). Precoder optimization for DSL with high crosstalk. Proceedings Joint WIC/IEEE Symposium on Information Theory and Signal Processing in the Benelux. Published. Joint WIC/IEEE Symposium on Information Theory and Signal Processing in the Benelux, Leuven. https://hdl.handle.net/2078.5/230181