摘要
正交幅度调制技术是一种功率和带宽相对高效的信道调制技术，因此在自适应信道调制技术中得到了较多应用。本文利用MATLAB6．5／SIMULINK4，0对调制解调系统进行仿真。首先，完成了对调幅系统（AM）的调制与解调，仿真实现了信息无失真的传输。其次，用正交幅度调制（QAM）方法实现了同时传输两路互不干扰的信号，并给出了各种仿真方法的原理。最后，为实际应用和科学合理地设计正交幅度调制系统提出了切实可行的改进建议。
Because quadrature amplitude modulation （QAM） is efficient in power and bandwidth, it has been used widely in the field of adaptable channel modulation. The modulation and demodulation system is simulated based on MATLAB6.5/SIMULINK4.0. First, we have achieved AM modulation and demodulation, and realized the information transmission by imitating without distortion. Second, using QAM carry out to deliver two signals at the same time without interference each other and give out the principal of all kinds of imitation method. The end, it provides a convenient and efficient improved advice to design a QAM system practically and scientifically.
作者
李晓蕊
李展
余翠
LI Xiao-rui, LI Zhan, YU Cui （1.College of Mathematics and Information Sciences,North China Institute of Water Conservancy and Hydroelectric Power, Zhengzhou 450011, China; 2.Department of Mathematics, Zhengzhou University, Zhengzhou 450001, China; 3.College of Mathematics and Computer Science, Fuzhou University, Fuzhou 350002, China）
出处
《电脑知识与技术》
2007年第6期1357-1359,共3页
Computer Knowledge and Technology
