摘要
讨论了无源定位的几种基本方法,介绍了时差定位的原理。研究了当前基于测量时差无源定位系统,及系统中存在的不足。提出了一种使用短时傅里叶变换提高时差测量精度的方法。最后,对此方法构成的时差无源定位系统做了计算机仿真,仿真结果显示,此方法具有时差测量精度高等优点,提高了整个无源定位系统的定位精度。
This paper discusses several basic methods of passive location and briefly introduces the principle of Time Difference of Arrival （TDOA） location. Current TDOA location systems are researched, and the advantages of them are described. A Short Time Fourier Transform （STFI＇） time difference measure is presented. Finally, a com- puter simulation of TDOA location system using STFT time difference measure is done, which shows this new method has the advantages of higher precision and so on thus improving the location precision of the whole passive location system.
出处
《电子科技》
2013年第2期45-48,共4页
Electronic Science and Technology
关键词
时差定位
统一信号
时间差
短时傅里叶变换
TDOA location
signal synchronization
time difference
short time fourier transform
