说明：  文档内包括：A/D转换,调制、信道编码、解调、D/A转换（matlab源代码）。适用于通信工程专业基础课程设计（通信仿真）
(Documents include: A/D conversion, modulation, channel coding, demodulation, D/A converter (matlab source code). Applicable to communication engineering basis for curriculum design (communications simulation))