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基于matblab的QPSK调制解调仿真

于 2022-07-02 发布 文件大小:14.95 kB
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QPSK调制全称Quadrature Phase Shift Keying,意为正交相移键控,是一种数字调制方式。它的频带利用率高,且抗干扰性能强,已经成为现代通信技术中一种十分重要的调制解调方式。本文在介绍了不同数字调制方式原理的基础上,分别利用matlab编程语言和建模仿真工具Simulink实现了QPSK系统的仿真设计,通过仿真图形观察了调制解调过程中各环节的波形,并结合QPSK调制技术的原理,分析了系统的性能,证明了仿真模型的可行性。最后,进一步实现了系统在分别通过理想信道、通过高斯信道、先通过高斯白信道再通过瑞利衰落信道时的仿真设计,对比分析了不同情况下的系统性能。所得出结果与理论基本相符,对于理解QPSK系统的性能并对系统面向实际应用的设计,提供了有效的参考依据。 

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