A cost-effective TEQ algorithm for ADSL systems

The discrete multitone (DMT) modulation/demodulation scheme is the physical-layer standard of the asymmetric digital subscriber line (ADSL) system. In the DMT transceiver, channel equalization is completed through two steps, namely, time-domain equalization (TEQ) and frequency-domain equalization (FEQ). The TEQ is introduced to shorten the channel response to a pre-defined length. On the contrary, FEQ is used to compensate for the magnitude and phase distortion caused by channel. A cost-effective on-line TEQ training algorithm is proposed. Simulation results show that the proposed TEQ algorithm has comparable performance with other existing on-line algorithms, and it achieves the lowest computational complexity among these TEQ algorithms