Minimum distortion TEQ equalizer design for DMT system

In this paper, the problem of time domain equalizer (TEQ) design for discrete multitone DMT applications is dealt with, based on a matrix time domain derivation of total distortion power of intersymbol interference (ISI) and noise in multicarrier modulation schemes with a cyclic prefix. We argue for a modification of the popular form of weighting shortened impulse response tail and head samples, contributing to ISI power. We stress the total power (not per-channel) nature of the solution, which means it is not directly bit rate oriented. However, the extension to a frequency domain bit rate maximizing approach has been sought as well and described in the cited reference. Despite all the numerical results, which are presented for the modification of one exemplary design algorithm presented recently, i.e. the eigenfilter of Vaidyanathan and Tkacenko, the main observation is valid for a wide range of design rules originating from the maximum shortening SNR approach.