摘要
在无源时差定位系统中,定位精度和系统稳定性是评价系统优劣的两个重要标准。在对影响二者的因素进行深入研究的基础上,提出一种利用辅助发射站发射时间同步检测信号的方法,通过确保测量站站间时间同步来提高定位精度,同时通过该信号检测测量站测时抖动,理论推导和初步的实验仿真都验证了该方法是有效的,能够提高测时差的精度和增强多站时差定位系统的稳定性。最后,详细介绍了整个系统的工作原理以及主站处理数据的主要流程。
In the passive TDOA system,positioning accuracy and stability of the system are two important standards for evaluating merits of the system.A method of using auxiliary stations to transmit time synchronization detection signal to ensure time synchronization between stations and to improve positioning accuracy is proposed based on analyzing the two key affecting factors.At the same time,detecting the time jitter of the receiving station by using the signal is reached.Theoretical analysis and preliminary simulation experiment verifies that the method is effective to improve the accuracy of measuring the time difference and enhance the stability of TDOA system.At last,principle of the whole system and main data processing of the main station are given.
出处
《现代电子技术》
2012年第1期85-87,91,共4页
Modern Electronics Technique
基金
国家自然科学基金资助项目(60672139
60972160)
