Crosstalk Channel Estimation via Standardized Two-Port Measurements. (22nd March 2009)

• Record Type: Journal Article
• Authors: Lindqvist Lindqvist, Fredrik Fredrik; Lindqvist Lindqvist, Neiva Neiva; Dortschy Dortschy, Boris Boris; Ödling Ödling, Per Per; Börjesson Börjesson, Per Ola Per Ola; Ericson Ericson, Klas Klas; Pelaes Pelaes, Evaldo Evaldo
• Other Names: Chambers Chambers Jonathon Jonathon Academic Editor.
• Is Part Of: EURASIP journal on advances in signal processing. Volume 2008(2008)
• Publication Date: 2009-03-22
• Subjects: Signal processing -- Periodicals; Traitement du signal; Signal processing; Periodicals; 621.3822
• DOI: 10.1155/2008/916865
• Languages: English
• ISSNs: 1687-6172

Abstract

Abstract : The emerging multiuser transmission techniques for enabling higher data rates in the copper-access network relies upon accurate knowledge of the twisted-pair cables. In particular, the square-magnitude of the crosstalk channels between the transmission lines are of interest for crosstalk-mitigation techniques. Acquiring such information normally requires dedicated apparatus since crosstalk-channel measurement is not included in the current digital subscriber line (DSL) standards. We address this problem by presenting a standard-compliant estimator for the square-magnitude of the frequency-dependent crosstalk channels that uses only functionality existing in today's standards. The proposed estimator is evaluated by laboratory experiments with standard-compliant DSL modems and real copper access network cables. The estimation results are compared with both reference measurements and with a widely used crosstalk model. The results indicate that the proposed estimator obtains an estimate of the square-magnitude of the crosstalk channels with a mean deviation from the reference measurement less than 3 dB for most frequencies.