Naslov
Statistical Properties of Direct Channel and Crosstalk Power Transfer Functions in High-Frequency xDSL Cables

Autori
Mikac, Vedran ; Bažant, Alen ; Beriša, Tomaž

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of the 2011 International Conference on Telecommunications Systems - Modeling and Analysis / - Prag, 2011, 143-152

ISBN
987-0-9820958-4-3

Skup
2011 International Conference on Telecommunications Systems - Modeling and Analysis

Mjesto i datum
Prag, Češka Republika, 26.05.2011. - 28.05.2011

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
xDSL; crosstalk; MIMO channel model; beta distribution

Sažetak
Transmission systems that, partially or completely, cancel crosstalk noise induced by the neighboring pairs in the binder can effectively utilize frequency spectrum above the range that is used by currently deployed systems in the local loop pant. Furthermore, crosstalk cancellation methods require high quality crosstalk models. In this paper we present crosstalk models valid up to 60 MHz, which are based on measurements performed on commercially available twisted pair cables. Furthermore, we show that the current one percent worst case model can be extended in the frequency range above 30 MHz. In the same frequency range, we analyze channel coupling dispersion and model it with the beta distribution. Distribution parameters are estimated using Levenberg-Marquardt curve fitting algorithm (LM), Nelder-Mead method (NM) and Powell’s constrained optimization by linear approximation (COBYLA). Finally, we provide an in depth discussion of both positive and negative aspects of every estimation method used and show that COBYLA gives the best results.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

POVEZANOST RADA