Data rate enhancement of VDSL via termination impedance matching

Author

Schwan, Martin A K ; LoCicero, Joseph L.

Author_Institution

Zebra Technol. Inc, Vernon Hills, IL, USA

Volume

3

fYear

2002

fDate

4-7 Aug. 2002

Abstract

Impedance mismatch due to bridge taps is a data rate limiting factor in DSL systems including VDSL. Three impedance matching approaches are investigated for VDSL transmission through twisted-pair subscriber lines. Mathematical modelling of heterogeneous twisted-pair transmission lines is discussed and forms the basis for termination impedance dependent received signal-to-noise ratio computations. Several subscriber line and bridge tap lengths are examined. Results indicate improvements in channel capacity up to 40% for cables with bridge taps that produce detrimental in-band frequency s.

Keywords

channel capacity; digital subscriber lines; impedance matching; twisted pair cables; VDSL; bridge taps; channel capacity; data rate enhancement; heterogeneous twisted-pair lines; in-band frequency s; signal-to-noise ratio computations; subscriber line; termination impedance matching; twisted-pair subscriber lines; Background noise; Bridges; Circuits; Crosstalk; DSL; Frequency; Impedance matching; Quadrature amplitude modulation; Signal to noise ratio; Transmitters;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2002. MWSCAS-2002. The 2002 45th Midwest Symposium on

Print_ISBN

0-7803-7523-8

Type

conf

DOI

10.1109/MWSCAS.2002.1187089

Filename

1187089