ADSL noise environment and potential system performance

Author

Chen, Walter Y. ; Waring, David L.

Author_Institution

Bellcore, Morristown, NJ, USA

fYear

1994

fDate

1-5 May 1994

Firstpage

451

Abstract

In this paper the general ADSL (asymmetric digital subscriber line) noise environment is reviewed in the context of the telephone loop plant. Special attention is given to the unique unidirectional transmission nature of ADSL. A set of noise environments is presented for related computer simulation studies and hardware tests. A set of mid-CSA test loops is also proposed for performance evaluation under conditions of T1 NEXT interference. To simplify calibration procedures, noise and loop models are revealed in FIR (finite impulse response) filter form and can be measured in dB loss or dBm/Hz power density terms. A subchannel signal to noise ratio (SNR) based computer simulation method is then used to estimate potential ADSL performance under different noise environments for different serving areas

Keywords

FIR filters; crosstalk; filtering theory; noise; performance evaluation; subscriber loops; telecommunication equipment testing; ADSL; FIR filter; T1 NEXT interference; asymmetric digital subscriber; calibration; computer simulation; finite impulse response; hardware tests; loop models; mid-CSA test loops; noise environment; noise models; performance evaluation; signal to noise ratio; system performance; telephone loop plant; unidirectional transmission; Computer simulation; DSL; Finite impulse response filter; Hardware; Interference; Signal to noise ratio; System performance; Telephony; Testing; Working environment noise;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications, 1994. ICC '94, SUPERCOMM/ICC '94, Conference Record, 'Serving Humanity Through Communications.' IEEE International Conference on

Conference_Location

New Orleans, LA

Print_ISBN

0-7803-1825-0

Type

conf

DOI

10.1109/ICC.1994.368863

Filename

368863