CDMA多用户传输系统物理层仿真

摘要

In order to research the capability of CDMA system resisting the multiple access disturbance and multipath interference, the simulation experiment for CDMA multi-user transmission systems was performed by comparing the influence of the modulation on system performance in the identical channel and comparing the performance of different channel systems which were modulated with the same method.The relationship between the capability of CDMA system (to resist the multiple access disturbance and multipath interference) and the orthogonal performance of the spread spectrum code was obtained by the experiment.The conclusions of CDMA system performanee were achieved by optimization.The features of various transmission models were verified by simulation examples.%为了研究CDMA系统抗多址干扰和多径干扰能力的目的,采用同一信道下比较调制对系统性能的影响,以及相同的调制方法下比较不同信道系统的性能的方法,做了对CDMA多用户传输系统的仿真实验,获得CDMA通信系统抗多址干扰和抗多径干扰能力与系统扩频码正交性能之间的关系,得到CDMA系统优化性能的结论,并通过仿真实例验证各种传输模型的特点.