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正交幅度调制QAM(Quadrature Amplitude Modulation)以其高频谱利用率、高功率谱密度等优势,成为宽带无线接入和无线视频通信的重要技术方案。文中介绍了QAM调制解调原理,提出了一种基于SystemView的16QAM系统调制解调方案,对16QAM系统的星座图和误码率进行了仿真。仿真结果证明该系统设计方案简易可行,对于QAM相关产品研发和QAM深入理论研究以及电子教学都具有一定的理论和实践指导意义。
Quadrature Amplitude Modulation (QAM) becomes an important technical solution for broadband wireless access and wireless video communications with its advantages of high spectral efficiency and high power spectral density. This paper introduces the principle of QAM modulation and demodulation, and proposes a 16QAM system modulation and demodulation scheme based on SystemView. The constellation and bit error rate of 16QAM system are simulated. The simulation results show that the system design scheme is simple and feasible, and has certain theoretical and practical significance for QAM related product development and QAM in-depth theoretical research as well as electronic teaching.