摘要
论述了正交幅度调制(QAM)的原理和特性,并在已知特性的通信信道上进行QAM调制和解调仿真,对具有符号间干扰(ISI)的信道进行线性均衡和判决反馈均衡来提高QAM调制解调的性能.通过对得到的仿真结果进行比较和分析,在理论上,得到合理设计QAM系统的方法.这些分析方法和得到的结论对工程中的QAM调制解调系统实现具有一定的价值.
The basic theory and performance of the quadrature amplitude modulation and demodulation is described. Through the known channels, quadrature amplitude modulation and demodulation is simulated. When the intersymbol interference exists in the channels, it is necessary to adopt linear equalizer or decision - feedback equalizer to improve the performance of the system. Then the results are analyzed and compared in order to design the applicable system, which are valuable to the system of quadrature amplitude modulation and demodulation.
出处
《昆明理工大学学报（理工版）》
2006年第2期57-61,共5页
Journal of Kunming University of Science and Technology(Natural Science Edition)
关键词
正交幅度调制
线性均衡器
符号间干扰
信噪比
调剂解调
quadrature amplitude modulation and demodulation
linear MSE equalizer
the intersymbol interference
signal - to - noise
modulation and demodulation
