数字调幅发射机调制原理分析  

Analysis of the Modulation Principle of Digital Amplitude Modulation Transmitter

作　　者：田玉灿 TIAN Yucan(Jining Radio and Television Transmission Support Center,Jining 272100,China)

机构地区：[1]济宁市广播电视传输保障中心,山东济宁272100

出　　处：《电视技术》2023年第3期78-81,共4页Video Engineering

摘　　要：数字调幅发射机把“音频+直流+抖动”的模拟信号转换成12 bit的数字信号去控制各个功放模块的开关状态,运用的数字调制技术包括模数(Analog/Digital,A/D)转换和数模(Digital/Analog,D/A)转换。基于此,介绍数字调制原理,并对转换错误问题进行分析和处理。The digital amplitude modulation transmitter converts the “audio+DC+jitter” analog signal into a 12 bit digital signal to control the switching state of each power amplifier module.The digital modulation technology used includes Analog to Digital(A/D)conversion and Digital to Analog(D/A) conversion.Based on this,this article introduces the principle of digital modulation,and analyzes and handles conversion errors.

关 键 词：模拟调制 相位补偿 数字调幅 

分 类 号：TN838[电子电信—信息与通信工程]