一种实用的DMT系统自适应比特交换算法

A Practical Adaptive Bit Swap Algorithm in the DMT System

在分析离散多频调制系统结构的基础上，提出一种利用符号判决后产生的误差信号估计噪声能量，并以此为依据进行自适应比特交换的算法。它的结构简单，实现灵活，适用于随时间变化比较缓慢的信道。

On the basis of analyzing the discrete multi-tone system structure , an adaptive bit swap algorithm which makes use of the error signal arising from symbol decision for estimating noise energy has been presented. With a simple structure and flexible implementation , it is suit- able for the slowly time varying channel (such as ADSL ) .