基于无线电通信系统的锁相环应用分析  

Radio communication systems based on the application of phase-locked loop analysis

作　　者：莫小灵[1] 

机构地区：[1]新余高等专科学校工程系,江西新余338000

出　　处：《思茅师范高等专科学校学报》2009年第3期74-77,共4页Journal of Simao Teachers' College

摘　　要：锁相环路是一种反馈控制电路,由鉴相器(PD)、环路滤波器(LF)和压控振荡器(VCO)三部分组成,具有锁定特性、载波跟踪特性、调制跟踪特性和低门限特性,广泛应用于无线电通信系统中的调制解调,频率合成等许多技术领域,是现代电子产品中非常重要的部件,这里首先对环结构和特性进行分析,然后讨论锁相环在无线电通信系统中的应用,通过框图和工作原理进一步阐述相应内容,使广大读者进一步认识锁相环。PLL is a feedback control circuit, by the by the phase detector （PD）, loop filter （LF） and voltage -controlled oscillator （VCO） is composed of three parts, with the locking features, carrier - tracking features, modulation tracking features and characteristics of low threshold, widely used in radio communication systems in the modulation and demodulation, frequency synthesis and so much technology, modern electronics are very important parts, this article first ring structure and characteristics of the analysis, then discuss the phase - locked loop In the radio communication system applications, through the diagram and working principle of further elaboration of the corresponding content, so readers a better understanding of phase - locked loop

关 键 词：锁相环路 跟踪特性 锁相接收机 反馈控制 

分 类 号：TN925[电子电信—通信与信息系统]