Distortion analysis in a new transmultiplexer for xDSL applications

A new approach to designing nearly perfect transmultiplexers based on cosine-modulated filter banks for xDSL applications is presented. We propose a new way of designing the prototype filter from which the transmitting and receiving filters are derived. The resulting TMUX systems do not have phase distortion, and amplitude distortion is almost null. The importance of the prototype filter design technique on the performance of the TMUX system is evaluated and a comparative analysis with other very efficient methods is realized