【摘要】 该文以QDPSK调制、解调实验为例,介绍了数字通信实验系统框架。重点描述和分析了QDPSK调制解调主要信号的时域和频域特性。阐述了频谱分析在通信实验中的重要作用。更多还原

【Abstract】 Based on the QDPSK modulation and demodulation,the framework of digital communication experiment system was introduced.The characteristics of major signals in QDPSK modulation and demodulation experiment were analyzed in detail, which was made in both time and frequency domain.The importance of spectrum analysis in communication experiment was explained.更多还原