VB和CVI混合编程及其在通信仿真中的应用

Visual Basic and CVI Mixed Programming and Its Application to Communication Simulation

为了实现对通信信号基本调制方式的分析与仿真,采用在短时间内较容易使用的VB语言和LabWindows/CVI中ActiveX控件相结合的混合编程模式,对多种基带信号(单音、语音和实时播放信号)8种常规调制(AM、DSB、SSB、FM、ASK、FSK、2PSK、DPSK)进行了建模,通过自定义参数设置,实现了对其进行时域和频域分析的仿真图.仿真结果为学生的课程学习提供了较好的工具和平台.

For the sake of analyzing and simulating the basic modulation of communication signals,the mixed programming mode was used,in which easier and short-time used VB language and Active control in Lab Windows/ CVI is combined.The modelings of eight general modulation（sAM、DSB、SSB、FM、ASK、FSK、2PSK、DPSK） with three baseband signals（tone,voice,and real-time play） were done.By self-defined parameter setting,the simulation map for time-domain and frequency domain analysis were realized,whose results can be a better tool and platform for the students.