基于仿真软件的正交调幅信号的数字调制

Digital Modulation of Quadrature Amplitude Modulation Signal Based on Simulation Software

调制技术(QAM)具有高的频带利用率,这在频带资源紧张的情况下显得尤为重要。软件无线电主要是针对目前无线通信领域存在的各种问题提出的,再加之它具有在一个可编程的硬件平台上,通过注入不同的软件,实现对调制工作频段、调制解调方式、信道多址方式等无线功能的改变,使系统的改进和升级方便经济且具有强大的生命力。采用基于QAM信号星座图,用MATLAB仿真软件对QAM信号的数字调制进行仿真。通过对仿真结果分析表明,用软件实现QAM信号数字调制的方案是可行的。

The technology of modulation(QAM) has higher spectrum utilization ratio,this is very important under the circumstance that the spectrum resource is scarce in modern society.The radio defined software is brought forward owing to various problems in radio communication field presently.Different softwares can be used to change wireless functions,such as the modulation work frequency band,the modulation and demodulation ways and the channel multiple access ways ect,thus make system s improvement and upgrading e...