频率捷变调频定距系统的研究
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摘要
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。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。最后对系统进行了设计和模拟仿真,验证了方案的合理性和可行性。
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. 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. At last, the paper designs and simulates the system by computer. It is proved that the scheme is reasonable and actable according to the result of simulation.
引文
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