Performance Analysis of a Non-Uniform DMT Transceiver in Digital Subscriber Line

A Non‐Uniform Discrete Multitone (DMT) transceiver employing an octave spaced quadrature mirror filter (QMF) bank, can be used to overcome the problem of channel noise enhancement in the zero‐ forcing (ZF) equalization technique. In this letter, performance of the Non‐Uniform DMT system is analyzed. A study of the crosstalk between sub‐channels due to non‐ideal filter banks is also presented. Crosstalk analysis is based upon the bit error rate (BER) performance versus the QMF order in a standadard ADSL channel. Performance comparison of the Non‐Uniform DMT transceiver and a conventional DMT system is given, and it is shown that the Non‐Uniform DMT transceiver displays slight improvement over the conventional DMT system for the filters of higher order.