Application of the Cascaded Transmission Line Theory of Paul and McKnight to the Evaluation of NEXT and FEXT in Twisted Wire Pair Bundles

The cascaded transmission line theory of Paul and McKnight is used in this paper to predict near-end crosstalk (NEXT) and far-end crosstalk (FEXT) in a bundle of twisted wire pairs. The approach is validated using the CST Cable Studio commercial software and experimental data. NEXT and FEXT along twisted pair bundles are then evaluated using a pure deterministic approach for the electromagnetic coupling while taking into account the random distribution of victim and aggressor pairs in the bundle. The results obtained using the presented approach are compared with available simplified empirical expressions (ANSI/FSAN). It is shown that the simplified expressions are able to predict the overall trend of the power sum loss. However, they do not always provide the worst case values. The presented theory can find important applications in the design of data transmission systems for which accurate crosstalk modeling is a vital task. It can be used for example as a replacement for the experiments in obtaining the parameters of simplified models for NEXT and FEXT.

[1]  J.-J. Werner,et al.  The HDSL environment (high bit rate digital subscriber line) , 1991 .

[2]  Jean-Jacques Werner,et al.  The HDSL Environment , 1991, IEEE J. Sel. Areas Commun..

[3]  Diego Bellan,et al.  Impact of twist non-uniformity on crosstalk in twisted-wire pairs , 2003, 2003 IEEE Symposium on Electromagnetic Compatibility. Symposium Record (Cat. No.03CH37446).

[4]  T. Sarkar,et al.  Analysis of Multiconductor Transmission Lines , 1988, 31st ARFTG Conference Digest.

[5]  A. Gibbs,et al.  The Covariance of Near End Crosstalk and Its Application to PCM System Engineering in Multipair Cable , 1979, IEEE Trans. Commun..

[6]  W. Y. Chen.  Architecture and performance simulation of single pair HDSL , 1996, Proceedings of ICC/SUPERCOMM '96 - International Conference on Communications.

[7]  John M. Cioffi,et al.  Understanding Digital Subscriber Line Technology , 1999 .

[8]  S. Bradley.  Crosstalk Considerations for a 48 Channel PCM Repeatered Line , 1975, IEEE Trans. Commun..

[9]  D. Cheng.  Field and wave electromagnetics , 1983 .

[10]  Clayton Paul,et al.  Prediction of Crosstalk Involving Twisted Pairs of Wires-Part I: A Transmission-Line Model for Twisted-Wire Pairs , 1979, IEEE Transactions on Electromagnetic Compatibility.

[11]  Simon Haykin,et al.  An Introduction to Analog and Digital Communications , 1989 .

[12]  Joungho Kim,et al.  A novel twisted differential line on PCB: crosstalk model and its application to high-speed interconnect circuit design , 2002, Electrical Performance of Electronic Packaging,.

[13]  H. Cravis,et al.  Engineering of T1 carrier system repeatered lines , 1963 .

[14]  G Spadacini,et al.  Plane-Wave Coupling to a Twisted-Wire Pair Above Ground , 2011, IEEE Transactions on Electromagnetic Compatibility.

[15]  Markus Schilpp.  A New Analytical Method for next and Fext Noise Calculation , .

[16]  N. Holte.  Simulation of Crosstalk in Twisted Pair Cables , 2006, Proceedings of the 7th Nordic Signal Processing Symposium - NORSIG 2006.

[17]  Kenneth J. Kerpez,et al.  Near-end crosstalk is almost Gaussian , 1993, IEEE Trans. Commun..

[18]  Clayton Paul,et al.  Prediction of Crosstalk Involving Twisted Pairs of Wires-Part II: A Simplified Low-Frequency Prediction Model , 1979, IEEE Transactions on Electromagnetic Compatibility.

[19]  Nils Holte.  An analytical model for the probability distributions of crosstalk power sum for a subset of pairs in a twisted pair cable , 2004, IEEE Global Telecommunications Conference, 2004. GLOBECOM '04..

[20]  David D. Falconer,et al.  Minimum Mean Square Equalization in Cyclostationary and Stationary Interference-Analysis and Subscriber Line Calculations , 1991, IEEE J. Sel. Areas Commun..

[21]  Naresh R. Shanbhag,et al.  VLSI systems design of 51.84 Mb/s transceivers for ATM-LAN and broadband access , 1998, IEEE Trans. Signal Process..