A DISCRETE MULTITONE TRANSCEIVER SYSTEM FOR HDSL APPLICATIONS

A discrete multitone (DMT) transceiver design for high-bit-rate digital subscriber line (HDSL) access is presented and analyzed. The DMT transmitter and receiver structure and algorithms are detailed, and the computational requirements of DMT for HDSL are estimated. We find that at a sampling rate of 640 kHz, using an appropriate combination of a short FIR equalizer and a length-512 DMT system, 1.6 Mb/s data transmission is possible within the CSA at an error rate of 10(-7) on a single twisted pair. We also show significant performance margin can be achieved when two coordinated twisted pairs are used to deliver a total data rate of 1.6 Mb/s. We conclude that, in terms of a performance-per-computation figure of merit, the DMT system is an excellent candidate for HDSL implementation.