多载波调制结合Turbo编码技术的性能分析

Performance of Multicarrier Modulation with Turbo Coding

多载波调制是一种有效克服衰落信道频率选择性的技术,从而显著减少码间干扰(ISI)。Turbo码以其接近香农极限的工作性能受到人们的注目,它能在极低信噪比条件下提供可靠通信。把多载波调制与Turbo 编码结合起来能够对整个系统提供显著的性能增益。本文试图对采用这两种技术的通信系统给出性能上的评估。

Multicarrier modulation is an efficient technique to overcome frequency selectivity of fading channel and hence to significantly reduce intersymbol interference （ISI）. It is of interest to note that the Turbo coding is capable of operating in the low signal to noise ratio which approaches the Shannon limit. The combination of multicarrier modulation and Turbo channel coding can provide significant performance gain of the overall system, In this paper, we try to give a performance evaluation of a communication system that integrates these two important techniques.