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 i
s maximized for each individual tone. The result is a larger bit rate while
complexity during data transmission is kept at the same level, Moreover, t
he per tone equalization is shown to have a reduced sensitivity to the sync
hronization delay.