数字调制系统码间干扰分析

Analysis on intersymbol interference of digital modulation system

通信系统中引起误码的主要因素是噪声和码间干扰。主要针对频带传输系统包括多进制调制系统如何能消除码间干扰问题进行了分析,提出了无码间干扰传输系统的传输函数应满足的条件、最高码元传输速率与系统带宽之间的关系以及不同调制系统的频带利用率。

In a communication systems, the main reasons are noise and intersymbol interference, that cause error codes. The paper studies on the problem mainly about how to eliminate the intersymbol interference in frequency transmission system, including M - ary modulation system, and points out the condition of the transfer function for transmission system without intersymbol interference, the relation of highest code element rate and system bandwidth and the band utilization rate of the different modulation system.