基带信号数字调制的设计与验证

Design and Verification of Digital Nodulation for Baseband Signal

数字信号的载波调制是数字通信中的关键技术,常用的载波调制技术有2ASK、2FSK、2PSK、QPSK、8PSK、4FSK等。这些电路的设计与验证用常规的方法来实现既费时又费力,借助于MultiSim10这一电子设计自动化工具,可以用VHDL建模的方法,实现基带信号数字调制的设计。使用在MultiSim10中创建的VHDL元件模型,设计出了基带信号常用的几种载波调制电路。通过观察分析电路输入输出波形,验证了载波调制和解调的实验结果。

Carrier modulation for digital signal is a crucial technology in digital communications, which includes 2ASK, 2FSK, 2PSK, QPSK, 8PSK, 4FSK, etc. The design and verification of these circuits is very difficult in the usual Way. The design of digital modulation for baseband signal can be realized by using EDA tool of Multisim10 and model of VHDL. Several conventional carrier modulation circuits have been designed by using the elements model that is created in Multsim10. Through observation and analysis on the input and output signal＇s waveform,we verify the laboratory result for carrier＇s modulation and demodulation.