视频调制信号质量参数的仿真与实验测量研究  

Simulation and Experimental Measurement of Video Modulation Signal Quality Parameters

作　　者：周彤[1] 常存[2] 鲁志军[1] 朴俊杰[2] 宋元培 张博[1] 

机构地区：[1]黑龙江省计量检定测试院,黑龙江哈尔滨150036 [2]黑龙江大学,黑龙江哈尔滨150080

出　　处：《自动化技术与应用》2017年第3期89-94,共6页Techniques of Automation and Applications

基　　金：国家科技支撑计划项目<三网融合中的视频计量标准与溯源技术研究>(编号2014BAK02B03)

摘　　要：我国三网融合中的视频信号采用正交振幅调制QAM(Quadrature Amplitude Modulation)作为信号调制方式,国产64QAM信号源与检测设备距离国际一流水平在精度和稳定性方面还有较大差距,本论文主要分析了QAM方式,建立了QAM调制仿真模型,分析并仿真了QAM信道的重要参数对MER值的影响,并分别进行了实验测量,观察到仿真结果与测量结果拟合度较好,同时分析了各组差异的原因,最终量化的各个参数分别与MER值的对应关系得到证实。The video signal of China＇s triple play uses quadrature amplitude modulation as the signal, domestic 64QAM signal source and testing equipment from the international first-class level in terms of accuracy and stability, there is a big gap modulation. In this paper, the QAM method is analyzed and the QAM modulation simulation model is established. The influence of the important parameters of the QAM channel on the MER is simulated and analyzed, and the experimental measurements are made. The simulation results are observed with the measurement results fit better, and analyzes the reasons for differences in each group. The individual parameters of the final quantization values corresponding to the relationship between MER are confirmed.

关 键 词：正交振幅调制 调制误差率 信道参数 

分 类 号：TN919.3[电子电信—通信与信息系统] TN914.3[电子电信—信息与通信工程]