频带传输的码间串扰

Intersymbol interference of frequency band transmission

针对通信中信号传输发生错误的问题进行研究,指出了造成判决错误的主要原因是噪声和由于传输特性不良引起的码间串扰,给出频带传输通信系统的模型,分析了无码间串扰的情况下,它的系统函数应满足的关系式,并指出了最高码元速率与系统带宽之间的关系。对于带通系统而言,最高码元速率为2W Baud,此时可获得的最高频带利用率为2Baud/Hz。

The paper studies the problem that signal transmitted in the communication systems causes errors the main reasons is noise and inter-symbol interference that cause bad transmit characteristics,So studying question of inter-symbol interference has important meanings.This text gives the models of the frequency band transmission communication system,in situation without inter-symbol interference,analyzes the relation expression that systemic function satisfies it and points out relation of highest code element rate and system bandwidth.For band-pass,the highest code element rate is 2W Baud,and the gettable highest rate of frequency band is 2 Baud/Hz.