ASK调制解调电路的设计与仿真.PDF

电 子 科 学 技 术 第 0 2 卷 第 0 4 期 2 0 1 5 年 7 月 Electronic Science Technology Vol.02 No.04 Jul.2015 电 子 科 学 技 术 Electronic Science Technology 22 00 11 55 年年 ASK调制解调电路的设计与仿真 唐玲 （西华师范大学物理与电子信息学院，四川南充，637009） 摘 要： 在无线通信系统 中调制解调 的设计尤为重要调制解调主要有三种 调频鉴频调 相鉴相调幅检波根据模拟相乘 的特性 A SK 信号利用模拟开关实现调制 然后利用锁相环 相干电路得到同频同相 的振荡信号再通过抽样判决器进行解调电路利用Mu lt i sim 软件进行 设计和仿真最后给出仿真结果由仿真结果可得知此方法能够实现信号的精确解调 关键词： 调制解调A SK Mu ltisim 仿真 中图分类号： TN 76 文献标识码：A 文章编号： 2095-8595 (2015) 04-486-04 电子科学技术 URL : http//www.chin a-est .com .cn DOI : 10 .16453/j .issn .2095-8595.20 15.04 .0 19 Design and Simulation of ASK Modulation and Demodulation Ling Tang ( College of Physics and Electronic Information, China West Normal University, NanChong, SiChuan, 637009, China ) Abstract: In a wireless communication system, design of modulation and demodulation is particularly important. There are three main method of modulation and demodulation: Frequency modulation and discriminator, Phase modulation and discriminator, amplitude modulation and detaction. According to the characteristics of analog multiplication, the modulation of ASK signal is using analog switches to realize, the output of PLL is the oscillator signal that is the same frequency and phase. Sample sentence get the demodulation signal. The circuit are designed and simulated based on Multisim, the simulative result is also provided. The simulation results show that precise demodulation can realize by this method . Key words: Modulation and demodulation; ASK; Multisim; Simulation 引