【摘要】 多电平编码调制技术是新一代超高速光通信系统中广泛使用的编码调制技术,其硬件电路由集成电路实现,内部结构复杂,不易理解。为了满足综合实验教学的同时,使学生了解前沿技术,设计了多电平编码的数字音频传输系统。该系统可以实现双路音频信号的同时收发,模块化的设计思想使学生通过观察各阶段时域波形直观了解各模块功能。同时,可以通过自主设计替换各模块,改善系统性能。该系统已成功应用于本科生创新实验,实践表明,该系统为学生提供了易于创新和综合的实践环境,提高了学生的综合运用能力和创新能力。更多还原

【Abstract】 The technology of multilevel encoding modulation is widely used in the new generation ultrahigh speed optical communication systems,its hardware is integrated circuit so it is complex. To satisfy the experiment teaching and make the students understand urology fronts and skilled technology. A digital voice transmission experiment system based on multilevel encoding is designed. The system can realize sending and receiving of digital voice signal which comes from two channels accurately,the idea of modularization design makes the students know the functions of each module visually though observing the time domain waveform,and the modules can be alternative designed. With the aid of the experiment system,undergraduate research innovation experiments are developed. It shows a practical environment which is easy to innovate outcomes and integrate knowledge,and it can improve students’ comprehensive utilization and innovation ability.更多还原