A time-domain equalizer minimizing intersymbol and intercarrier interference in DMT systems

Author

Baldemair, Robert ; Frenger, Pål

Author_Institution

Ericsson, Stockholm, Sweden

Volume

1

fYear

2001

fDate

2001

Firstpage

381

Abstract

Discrete multitone modulation allows for a simple receiver structure if the impulse response of the communication channel is shorter than the cyclic prefix. In ADSL, a time-domain equalizer (TEQ) is used to fulfil this requirement. Without a TEQ, unwanted intercarrier interference (ICI) and intersymbol interference (ISI) occur. In this paper, quadratic forms are developed to calculate the contributions of ICI and ISI to the desired signal. Based on these expressions, a new method for calculating the TEQ coefficients, which minimizes the effects of ICI, ISI, and additive noise, is derived. Simulations in the context of ADSL compare the performance of this new algorithm with one that is state of the art

Keywords

digital subscriber lines; equalisers; interference suppression; intersymbol interference; modulation; noise; time-domain analysis; transient response; ADSL; DMT systems; ICI; ISI; TEQ coefficients; additive noise; cyclic prefix; discrete multitone modulation; impulse response; intercarrier interference; intercarrier interference minimisation; intersymbol interference; intersymbol interference minimisation; simulations; time-domain equalizer; Additive noise; Communication channels; Context; Convolution; Demodulation; Discrete Fourier transforms; Equalizers; Intersymbol interference; OFDM modulation; Time domain analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Global Telecommunications Conference, 2001. GLOBECOM '01. IEEE

Conference_Location

San Antonio, TX

Print_ISBN

0-7803-7206-9

Type

conf

DOI

10.1109/GLOCOM.2001.965143

Filename

965143