FEXT cancellation for high-speed local transmission over twisted pair wiring 


Vol. 27,  No. 8, pp. 782-791, Aug.  2002


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  Abstract

This paper discusses a far-end crosstalk (FEXT) canceller for twisted-pair transmission. Many twisted-pair systems such as fiber-to-the-curb (FTTC), very high-speed digital subscriber line (VDSL), and high-speed LAN systems, use frequency-division duplexing (FOD) for duplex transmission. It is shown that the maximum reach of FDD twisted-pair system is limited by the performance of its upstream channel, which is located at higher frequencies than the downstream channel. In order to improve the performance of such FDD transceiver, FEXT cancellation is introduced for the channel at higher frequencies. A system arrangement and its blind start-up procedure are studied when the FEXT canceller and equalizer are jointly adapted to combat channel intersymbol interference (lSI), FEXT, and other additive noise. The initial convergence and the steady-state behavior of the proposed twisted-pair system without requiring transmission of an ideal training sequence are investigated. Measured characteristics as well as analytical model of the FEXT channel are used to estimate the time span needed for the FEXT canceller. It is also shown that the memory span for the FEXT canceller is almost independent of the channel, thus making our results useful for the twisted-pair system over all different channels.

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  Cite this article

[IEEE Style]

J. Woo, K. Kang, G. Im, "FEXT cancellation for high-speed local transmission over twisted pair wiring," The Journal of Korean Institute of Communications and Information Sciences, vol. 27, no. 8, pp. 782-791, 2002. DOI: .

[ACM Style]

Jung-Soo Woo, Kyu-Min Kang, and Gi-Hong Im. 2002. FEXT cancellation for high-speed local transmission over twisted pair wiring. The Journal of Korean Institute of Communications and Information Sciences, 27, 8, (2002), 782-791. DOI: .

[KICS Style]

Jung-Soo Woo, Kyu-Min Kang, Gi-Hong Im, "FEXT cancellation for high-speed local transmission over twisted pair wiring," The Journal of Korean Institute of Communications and Information Sciences, vol. 27, no. 8, pp. 782-791, 8. 2002.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880