频率捷变 meaning in English
fa
frequency agility
Examples
- Chapter 3 considers location of a stationary target with time - varying emitting signal , such as frequency hopping signal and linear fm signal
在第三章里，主要研究了频率时变信号（如频率捷变信号和线性调频信号）的定位算法。 - Frequency ’ s switching time , which directly affects the hopping speed of interferential system as well as radar ’ s frequency agility , is being paid more and more attention . this paper mainly analyzed the frequency synthesizer ’ s agile character
其中,捷变时间这一指标,由于直接影响到跳频干扰和抗干扰系统的跳速,以及雷达频率捷变特性,越来越受到人们的关注。 - On the base of researching the theory of the scheme and analyzing the signal feature , it is obtained that the existence manners and character of distance information in the differential frequency signal . at the same time , a new conclusion is gained that the technology of frequency agility can decrease the constant error of system . it is also to say that frequency agility and frequency modulation fixed - distance fuze has the similar feature to random period frequency modulation fixed - distance fuze . according to the theory of address coding in the hopping - frequency communication , the paper presents the principle of selecting the frequency agility sequence which fit to the radio fuze and constructs the frequency agility sequence family based on the rs codes
在深入研究方案原理和分析信号特征的基础上，获得了该体制引信差频信号中，距离信息的存在形式和特点，得出了频率捷变技术的引入降低了系统定距固定误差这一新的结论，即频率捷变调频定距引信在定距性能上具有类似随机周期调频定距的特征。本文引入跳频通信地址编码理论，结合无线电引信的具体特征，提出了适用于无线电引信的频率捷变序列的选择原则，并构造了基于rs码的宽间隔频率捷变序列族。 - By making full use of favourable narrow - band tracing filter character of pll and by combining the merits of dds such as super fine frequency resolution 、 high frequency accuracy 、 very fast frequency hoping with it , the pll / pll + dds frequency synthesizer presents wide band high quality source and super small frequency hoping step . while the electronically tuned filter abates the image interference and notably improves the selectivity . the theorem of frequency synthesizer and center - frequency - fixed filter is simply but adequately introduced first in this paper
课题中所采用的pll或dds pll锁相频率合成方法充分发挥锁相环良好的窄带跟踪滤波特性，并结合dds的高频率分辨率、高频率精确度和高速频率捷变等优点，分别实现了系统所要求的高质量宽带本振源和小步长频率捷变；采用电调谐选频技术，则大大改善了接收机的选择性和抗干扰能力。 - This paper applies the technology of frequency agility to radio fuze which has been applied widely in the field of radaf and communication , and introduces a scheme of frequency agility and frequency modulation fixed - distance fuze which has good precision of fixed - distance and strong ability of anti - interference
本文将应用于雷达和通信领域的频率捷变技术引入到无线电引信，提出了一种既具有较高定距精度，又具有较强抗干扰性能的新的频率捷变调频定距引信方案。