Title :
Per tone equalization for DMT-based systems
Author :
Van Acker, Katleen ; Leus, Geert ; Moonen, Marc ; van de Wiel, O. ; Pollet, Thierry
Author_Institution :
Katholieke Univ., Leuven, Belgium
fDate :
1/1/2001 12:00:00 AM
Abstract :
An alternative receiver structure is presented for discrete multitone-based systems. The usual structure consisting of a (real) time-domain equalizer in combination with a (complex) 1-tap frequency-domain equalizer (FEQ) per tone, is modified into a structure with a (complex) multitap FEQ per tone. By solving a minimum mean-square-error problem, the signal-to-noise ratio is maximized for each individual tone. The result is a larger bit rate while complexity during data transmission is kept at the same level. Moreover, the per tone equalization is shown to have a reduced sensitivity to the synchronization delay
Keywords :
digital subscriber lines; equalisers; frequency-domain analysis; least mean squares methods; modems; optimisation; synchronisation; ADSL; DMT modem; DMT-based systems; bit rate; data transmission; discrete multitone-based systems; frequency-domain equalizer; minimum mean-square-error problem; multitap FEQ; per tone equalization; receiver structure; signal-to-noise ratio; synchronization delay; Bit rate; Data communication; Delay; Demodulation; Equalizers; Frequency synchronization; Intersymbol interference; OFDM modulation; Signal to noise ratio; Time domain analysis;
Journal_Title :
Communications, IEEE Transactions on
