基于虚拟仪器的调相与鉴相实验

Phase modulation and demodulation experiments based on VI

学生对相位调制与解调认识的模糊和肤浅，在一定程度上是因为没有相关的实验教学内容。该文介绍了调相和鉴相的基本原理，提出了基于虚拟仪器的调相与鉴相仿真，以及利用现有的调频与鉴频实验电路进行调相与鉴相实验的实验方案，根据具体要求设计了仿真实验的虚拟仪器，并进行了仿真和实际实验的检验。结果证明虚拟仪器的实验波形正确，进而证明了虚拟仪器设计和实验方案是正确的，基于虚拟仪器的调相与鉴相实验是可行的。

The reason of why students do not understand well phase modulation and demodulation after learning course of high frequency electronics is, to some extent, that there were not corresponding experiments in the experimental teaching program. This paper introduces principle of phase modulation and demodulation, sets forth experimental scheme based on Ⅵ to simulate the phase modulation and demodulation, and develop phase modulation and demodulation experiments by using present experimental circuits for frequency modulation and demodulation, exploits VI suitable for simulation and real experiments according to their different demands, and inspects the Ⅵ with simulation and practical experiment. Resultants of the Ⅵ to operate were proved to be correct, further it was proved that design of the Ⅵ and the experimental scheme all were correct. Therefore phase modulation and demodulation experiments based on Ⅵ were feasible.