基于求导比值的调频连续波测距方法  

A New Ranging Method for FMCW Fuze Based on the Ratio of the Derivation

作　　者：向程勇 潘曦[1] 王正浩[2] 王方洲[1] 

机构地区：[1]北京理工大学机电学院,北京100081 [2]中国电子科技集团公司第29研究所,四川成都610036

出　　处：《兵工学报》2014年第5期613-619,共7页Acta Armamentarii

基　　金：总装备部"十二五"预先研究项目(51305050103)

摘　　要：调频连续波(FMCW)引信具有低截获概率、高测距精度的优点,成为无线电引信领域研究热点。传统FMCW引信多采用谐波定距法,该方法存在与调制频偏成反比的固有误差;而近距离调频雷达中使用的补零快速傅里叶变换(FFT)法等频域方法,运算量较大,在低成本、低功耗常规武器引信中实现存在难度。针对该问题提出一种基于求导比值的调频测距时域分析方法,在不提高调制频偏的条件下降低测距误差,实现高精度定距,同时该方法具有运算量小、实时性高的优点,适合常规武器引信上使用。Frequency modulation continuous wave （FMCW） fuze has the advantages of low probability of intercept and high ranging accuracy. The traditional harmonic detection algorithm used for FMCW fuze has the inherent error, which is inversely proportional to the frequency offset. And the computing amount of FFT method used for the short range frequency modulated radar is huge, and the hardware is not easy to implement in low cost application. A new algorithm based on the derivative ratio is proposed to reduce the error without increasing the frequency offset. Furthermore, owing to the severe requirement related to the volume and cost of traditional fuze, the new method has the advantage of small amount of computation and high real-time performance, which makes it more implementable in low-cost hardware such as the single chip microcomputer （SCM）.

关 键 词：兵器科学与技术 引信 调频连续波 测距误差 

分 类 号：TN951[电子电信—信号与信息处理]