一种提取非合作源定位中多普勒信息的新方法

A New Method of Extracting Doppler Information in Non-cooperative Source Location

为了解决常规多普勒信息提取方法中存在计算量大、精度低的缺点,对基于非合作源无源定位技术中的多普勒信息提取方法作进行了研究,提出了有效提取电台多普勒信息的方法.应用该方法提取非合作源多普勒信息具有精度高、计算量小的优点,在载波提取过程中,摒弃了以往的搜索算法,采用了设计提取纯净载波环路的方法,从而使该方法具有良好的实时性特点.仿真实验表明,采用该方法测量多普勒频率变化率,1 s内多普勒频率变化量最大为0.52%,6 s内变化量最大为1.6%,能够满足实际工程的需要.

In order to address conventional Doppler information extraction method which has large amount of calculation and low precision of the shortcomings, the authors have a deep research in getting doppler information based on the passive location technology of noncooperated source , and also put forward an effective method to solve this problem. Application of this method to extract Doppler information has the advantages of higher precision and lower computational amount, and in the carrier wave extraction process. Discarding the previous searching algorithm, and the method of designing PLL is used to extract pure carrier wave, so that the method has the good real-time property. Simulation experiments show that using this method to measure the Doppler frequency change rate, a maximum of variation of that in 1 second is 0. 52%,and also in 6 seconds is 1.6%. This performance could meet the project＇s requirements.