数字鉴频器的原理与应用  

The Principle and Application of Digital Frequency Discriminator

作　　者：梁士龙[1] 

机构地区：[1]中国航天科工集团公司二院25所,北京100854

出　　处：《制导与引信》2003年第1期9-12,32,共5页Guidance & Fuze

摘　　要：在PD雷达导引头数字中频接收机中 ,采用数字鉴频器和数控振荡器构成速度跟踪回路。阐述了一种数字鉴频器的工作原理 :通过数字鉴相和相位微分来实现数字鉴频。并介绍了实现方法和实测结果。测试结果表明 :数字鉴频器具有稳定性好、鉴频精度高、鉴频斜率线性度理想。In the digital IF receiver utilized in PD radar seeker system, digital frequency discriminator and numerical controlled oscillator are used to make up the velocity tracking loop. In this article, the principle of a digital frequency discriminator is described(To implement frequency discriminating by digital phase discriminating and phase differential). The implementation method is introduced, and the test results of it are given. Test results indicate, there are some better characteristics of digital frequency discriminator than analog one as following: better stability, higher precision of frequency discriminating, better linearity of frequency discriminating slope, wider frequency discriminating range, etc.

关 键 词：数字鉴频器 雷达导引头 数字接收机 工作原理 

分 类 号：TJ765.33[兵器科学与技术—武器系统与运用工程] TN763.2[电子电信—电路与系统]