Title :
A comparative performance evaluation of DMT (OFDM) and DWMT (DSBMT) based DSL communications systems for single and multitone interference
Author :
Akansu, Ali N. ; Lin, Xueming
Author_Institution :
Inst. of Technol, New Jersey Center for Multimedia Res., Newark, NJ, USA
Abstract :
Multicarrier modulation techniques have been proposed for digital subscriber line (DSL) applications. The performance of DMT (OFDM) and DWMT (DSBMT) techniques for single and multitone interference are investigated. It is shown that a DMT system is sensitive to the location of narrow band interference. The DMT technique needs additional narrow band interference canceller before the forward FFT transform for performance improvements. In the DSBMT technique, due to a limited spectral overlap between its subcarriers, single (multi)-tone interference could affect only a few subchannels which correspond to these interferences. The DSBMT has a superior performance than DMT
Keywords :
discrete Fourier transforms; frequency division multiplexing; interference suppression; modulation; subscriber loops; transceivers; wavelet transforms; DMT system; DSBMT; DSL communications systems; DWMT; OFDM; comparative performance evaluation; digital subscriber line; discrete Fourier transform; discrete subband multicarrier transceiver; discrete wavelet multicarrier transceiver; forward FFT transform; multicarrier modulation; multitone interference; narrow band interference; narrow band interference canceller; single tone interference; spectral overlap; subcarriers; Additive white noise; DSL; Digital modulation; Discrete wavelet transforms; Filter bank; Interference; Multimedia systems; Narrowband; OFDM modulation; Transceivers;
Conference_Titel :
Acoustics, Speech and Signal Processing, 1998. Proceedings of the 1998 IEEE International Conference on
Conference_Location :
Seattle, WA
Print_ISBN :
0-7803-4428-6
DOI :
10.1109/ICASSP.1998.679562
