A new loading algorithm for discrete multitone transmission

TLDR

A new loading algorithm for discrete multitone transmission is proposed. The algorithm assigns rate and transmit power to maximize per‑carrier SNR, yielding closed‑form, low‑complexity expressions that outperform the Chow et al. method. It achieves equal or better performance, as demonstrated on high‑rate twisted‑pair transmissions.

Abstract

A new loading algorithm for discrete multitone transmission is proposed. Thereby rate is not distributed according to channel capacity, but rate and transmit power are assigned to maximize the signal-to-noise ratio in each carrier. Because closed form expressions can be derived the algorithm is of very low complexity, even lower than the loading algorithm recently proposed by Chow et al. (see IEEE Transactions on Communications, no.2/3/4, p.773-5, 1995). Nevertheless achievable performance is higher or at least the same. Results for a typical high rate transmission over twisted pair lines are presented.