移动通信直序扩频虚拟仿真实验教学

Virtual Experiment Teaching for Direct Spread Spectrum of Mobile Communications

为克服移动通信传统教学方法内容枯燥,难于理解,实验设备有限等弊端,我们在该课程的教学实验中突出技术实用性和现代性等特点,采用移动通信调制解调联合建模方法,基于Verilog语言在QuartusⅡ开发平台上进行仿真,结果用二维图显示出来,可以清晰地看到每个信号的波形,为学生直观展示伪随机的宽带信号,扩频调制与解调变化以及码元判决等相关教学内容,有助于学生更好地理解扩频调制与解调及信号分析。学生易于掌握综合性相关知识点,增强理论与实际相结合的能力。

To overcome the shortcomings of traditional teaching method of mobile communications such as content boring,difficult to understanding,experiment equipment limited,malpractice,etc.,we highlight practical and modern features of the course in experimental teaching. By mobile communications modulation demodulation joint method,based on Verilog language in Quartus II the authors develop a platform for simulation,and the simulating results are displied with 2-dimension figures such that waveform of every signal can be seen clearly. Students can intuitively understand pseudo random of broadband signals,spread frequency modulations and demodulation changes. It can help students better understand the spread spectrum modulation and demodulation,and the theory of signal analysis,make students easy to acquire comprehensive knowledge,and enhance the ability to combine theory with practice. Students are familiar with electronic systems design theory and design method,are mobilized their enthusiasm and scientific interest. Good results have been achieved in the teaching practice,and the simulation platform lays a solid foundation for subsequent related content learning.