毕设 业计
（20 届）
基于MC1496的2DPSK调制解调器设计
所在学院 专业班级 电子信息工程 学生姓名 学号 指导教师 职称 完成日期 年 月
摘 要
调制解调器（modem）是数字通信技术中的一个重要组成部分。随着通信
技术日新月异的发展，尤其是数字通信的快速发展越来越普及，数字通信广泛应用于单位企业和个人家庭中。对于学习有关该技术专业的学生来说，需要对调制解调器的工作原理和工作次序作更好的了解，这样对自己的工作和学习也有更多的帮助，所以课题选择了设计基于MC1496的2DPSK调制解调系统。论文根据技术要求和功能要求设计各单元电路，包括时钟电路、调制模块中的信号源产生电路、差分编码电路和2PSK调制电路，以及解调模块中的延时电路、噪声源电路、带通滤波器、乘法器、低通滤波器、抽样判决器以及码反变换电路；利用protel软件画出各模块电路图；然后在电路板上安装、焊接所设计的电路； 再对所焊的电路进行调试、测量，作好有关的数据、波形。最后完成符合要求的2DPSK调制解调器。
关键词： 数字通信；差分移相键控（2DPSK）；MC1496
- 1 - Abstract
With the rapid development of communication technology, especially the rapid
adoption of digital communication, the researchers put on its relevant technology of great interest . In order to make the digital signal transfer in the band-pass channel,it must modulate the carrier wave using digital signal,and its modulation mode is similar to that of analog signal. Through the channel transmission, the modulated signals can return to digital signals after demodulation at the receiver.Therefore, medulation and demodulation technology are important means of realizing the modern communication,and they promote the rapid development of communication. Modem is an important part of digital communication technology,and widely used in enterprises and individual families.To our students that learn about the professional technology , we should have a better understanding of modem’s working principle and working order,it will also do help to our work and study. Therefore,in the subject it will design the 2DPSK demodulation system baseing on MC1496.The subject adopts hardware design with software simulation, designs each unit circuit according to the technical requirements and function diagram, Including clock module, demodulation module circuit and 2PSK differential coding modulation and demodulation module circuit and the delay circuit and noise circuit, band-pass filter, on time-multiplier, low-pass filter, sampling judgment device and yards inverse transform circuit; depends on the situation to simulate and modificate, and then forms the entire system circuit. Then we should install and weld the designed circuit on the circuit board,and debug and measure the welding circuit,record the datas and waveforms. At last,it will accomplish the desirable 2DPSK modem.
Keywords: digital communication ;differential phase shifting keying (2DPSK);
MC1496
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基于MC1496的2DPSK调制解调器设计【毕业作品】
