摘要
设计了"正弦信号PCM编码和PSK调制频带传输"实验。采用通信原理实验箱和20MHz双踪示波器,2kHz的正弦波在8kHz窄脉冲采样信号和64kHz编译码时钟作用下,把模拟信号转换为数字信号;选择1MHz正弦波为载波进行PSK调制和解调,调制后的信号能解调出原来的数字信号,在同步时钟作用下,将信号还原为2kHz的正弦波。通过该实验,学生可直观地了解PCM编码和译码、PSK调制和解调过程。
The experiment of sinusoidal signal PCM coding and PSK modulation band transmission is designed. By using the experimental box of the communication principle and the 20 MHz dual trace oscilloscope,and with the 2 kHz sine wave under the action of 8 kHz narrow pulse sampling signal and the 64 kHz codec clock, the analog signal is converted into the digital signal.The 1 MHz sine wave is selected to carry out the PSK modulation and demodulation for the carrier wave,and the modulated signal can be used to adjust the original digital signal.Under the action of the synchronous clock,the signal energy can be returned to the 2 kHz sine wave.Through this experiment,the students can intuitively understand the PCM encoding and decoding,the PSK modulation and demodulation processes.
出处
《实验技术与管理》
CAS
北大核心
2017年第8期150-152,共3页
Experimental Technology and Management
基金
湖北省教育科学"十二五"规划2013年度重点课题(2013A052)
关键词
调制解调
实验教学
PCM
PSK
modulation and demodulation
experimental teaching
PCM
PSK
