广播电视无线发射技术要点分析  

Analysis of the Key Points of Wireless Transmission Technology in Broadcasting and Television

作　　者：魏璐 WEI Lu(Yuxi Wunaoshan Radio and Television Transmission Station,Yuxi 653100,China)

机构地区：[1]玉溪市五脑山广播电视发射台,云南玉溪653100

出　　处：《电视技术》2024年第5期127-130,共4页Video Engineering

摘　　要：对广播电视无线数字化系统中应用到的多项核心技术进行了深入剖析和探讨。首先,分析调制技术,介绍了调频(Frequency Modulation,FM)/调幅(Amplitude Modulation,AM)调制的原理,并阐述了数字调制技术如正交幅度调制(Quadrature Amplitude Modulation,QAM)、正交频分多址(Orthogonal Frequency Division Multiple Access,OFDMA)等的工作机制与优势。其次,探讨数字电视广播的传输技术,包括地面数字电视传输标准和卫星传输技术。再次,重点分析音视频编码、信道编码等信号处理技术,说明它们在压缩数据、抗干扰方面的作用。最后,介绍多频网(Multi Frequency Network,MFN)和单频网(Single Frequency Network,SFN)两种网络配置方式的不同。通过应用这些技术,我国已构建起规模庞大、技术先进的广播电视无线发射网络,为人们获取音、视频信息提供保障。In this paper,several core technologies applied in radio and television wireless digitization system are deeply analyzed and discussed.Firstly,the Modulation technology is analyzed,and the principle of Frequency Modulation(FM)/Amplitude Modulation(AM)is introduced.Digital Modulation techniques such as Quadrature Amplitude Modulation(QAM),Orthogonal Frequency Division Multiple Access(Orthogonal Frequency Division Multiple Access)are also described.The working mechanism and advantages of OFDMA.Secondly,the transmission technology of digital television broadcasting is discussed,including terrestrial digital television transmission standard and satellite transmission technology.Thirdly,the signal processing techniques such as audio and video coding and channel coding are analyzed,and their functions in data compression and anti-jamming are explained.Finally,the paper introduces the difference between the configuration of Multi Frequency Network(MFN)and Single Frequency Network(SFN).Through the application of these technologies,China has built a large scale,advanced technology radio and television wireless transmission network,to provide protection for people to obtain sound and video information.

关 键 词：广播电视 无线发射 数字化 编码调制 

分 类 号：G22[文化科学]