正弦信号PCM编码和PSK调制频带传输实验探讨
发布时间:2018-06-25 19:47
本文选题:调制解调 + 实验教学 ; 参考:《实验技术与管理》2017年08期
【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。
[Abstract]:The experiment of sinusoidal signal PCM coding and PSK modulation band transmission is designed. Using the communication principle experiment box and the 2kHz sinusoidal wave of 20MHz dual tracer oscilloscope, the analog signal is converted into digital signal under the action of 8kHz narrow pulse sampling signal and 64kHz encoding and decoding clock, and the 1MHz sine wave is selected as carrier for PSK modulation and demodulation. The modulated signal can deactivate the original digital signal and restore the signal to a sinusoidal wave of 2kHz under the action of synchronous clock. Through this experiment, students can directly understand the PCM coding and decoding PSK modulation and demodulation process.
【作者单位】: 武汉交通职业学院电子与信息工程学院;
【基金】:湖北省教育科学“十二五”规划2013年度重点课题(2013A052)
【分类号】:G712;TN911.3-4
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本文编号:2067271
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