Symmetric eigenfilters for partial shortening in ADSL DMT transceivers

Author

Ribeiro, Carlos ; Suva, V. ; Diniz, Paulo S R

Author_Institution

Escola Superior de Tecnologia e Gestao, Inst. Politecnico de Leiria, Portugal

Volume

2

fYear

2003

fDate

1-4 July 2003

Firstpage

399

Abstract

A partial shortening method of equalization for xDSL is presented. The novel method is suitable for FDD systems, shortening the effective channel impulse response and, additionally, achieving out-of-band noise reduction. A family of solutions based on linear phase FIR equalizers is described. The mathematical framework for all symmetric filters is developed. Channel shortening and bit rate simulation results for several VDSL test loops, show that the novel method yields a similar performance and reduces the out-of-band noise, with a considerably lower mathematical complexity and a simpler implementation.

Keywords

digital subscriber lines; equalisers; filtering theory; telecommunication channels; transceivers; transient response; ADSL DMT transceivers; FDD systems; VDSL test loops; asymmetric digital subscriber lines; channel shortening; discrete multitone system; effective channel impulse response; frequency division duplexing; linear phase FIR equalizers; mathematical complexity; out-of-band noise reduction; partial shortening; symmetric eigenfilters; symmetric filters; very high speed digital subscriber lines; xDSL; Bit rate; Convolution; Equalizers; Finite impulse response filter; Frequency domain analysis; Noise reduction; OFDM modulation; Symmetric matrices; Telecommunications; Transceivers;

fLanguage

English

Publisher

ieee

Conference_Titel

Signal Processing and Its Applications, 2003. Proceedings. Seventh International Symposium on

Print_ISBN

0-7803-7946-2

Type

conf

DOI

10.1109/ISSPA.2003.1224898

Filename

1224898