短基线时差定位技术研究

Research into Time Difference Location Technology of Short Baseline

由于当前的长基线时差定位系统不能对窄波束辐射源目标定位,提出了短基线时差定位技术。首先推导了短基线时差定位算法;然后分别对长、短基线时差定位系统的定位精度分布进行了仿真,根据定位精度需求对时差测量精度提出了要求,通过仿真分析得出两路信号相关算法已经不能满足该时差精度需求,需要研究新的时差测量算法;最后提出了利用信号载频相位信息求时差的研究思路,为高精度时差测量精度的研究提供了参考,也为短基线时差定位系统的实现提供了技术基础。

Because current time difference location system of long baseline can not locates narrowbeam emitter target,this paper presents the short baseline time difference location technology.Firstly,short baseline time difference location algorithm is deduced;then the location accuracy distribution of long baseline time difference location system and short baseline time difference location system are simulated separately,the requirement to time difference measurement accuracy is presented according to the requirement of location accuracy,and simulation and analysis show that 2-channel signals correlation algorithm can not satisfies the requirement of the time difference accuracy,so a new time difference measurement algorithm must be studied.Finally,this paper proposes a research idea that uses the carrier frequency and phase information of signal to fetch the time difference,which offers references for studying high-precision time difference measurement accuracy and offers technique base for realizing time difference location system of short baseline.