EQUALIZATION SCHEME FOR DSL RECEIVERS IN PRESENCE OF AN UNDER-SAMPLED OR OVER-SAMPLED TRANSMIT IDFT

摘要

A circuit and method is provided for reducing the effect of having potentially different sizes for an Inverse Discrete Fourier Transform (IDFT) at a transmitter (204) and a Discrete Fourier Transform (DFT) at a receiver (206) in a telecommunications system without requiring a change in the DFT's size. The method includes following steps. The first step includes determining whether the IDFT size is greater than, equal to, or less than the DFT size. The second step includes selecting a target impulse response length from a predefined set of impulse response lengths (202) in accordance with a result the previous step. The third step includes training an equalizer at the receiver to the target impulse response length. The circuit comprises hardware and software for implementing the method.