码间干扰的消除研究

A Research on Avoiding Intersymbol Interference

在数字信号的基带传输过程中,信息传输速率在满足香农公式的条件下还极大地受到码间干扰的限制。为消除码间干扰,就必须使信息传输速率和系统带宽之间产生确定比例的约束关系,从而使系统的频带利用率也受到限制。运用系统冲激响应过零点消除码间干扰的方法对几种常见的基带系统和部分响应系统进行分析,直接给出其消除码间干扰和获得最大频带利用率的方法,为实际的应用提供一种理论指导。

It is also limited by intersymbol interference when transmission speed of code accord with Shannon expressions in the course of baseband transmission of digital signal. For avoiding intersymbol interference,a determinate relationship is requested between transmission speed of code and system bandwidth so that spectrum efficiency is limited. By analyzing several normal baseband - systems and part - response systems according to the method of unit - impulse response being zero, the method of avoiding intersymbol interference and getting gives a direction of theory for the practical application. max - spectrum efficiency is given direct in this paper, a point that gives a direction of theory for the practical application.