%0 Journal Article
%T 基于TDOA系统的高精度软时钟同步方法<br>High Precision Soft Clock Synchronization Method Based on TDOA System
%A 严格
%A 侯宏卫
%A 罗易凡
%A 房天昊
%A 王闻今
%A 吴驰
%J Hans Journal of Wireless Communications
%P 185-198
%@ 2163-3991
%D 2019
%I Hans Publishing
%R 10.12677/HJWC.2019.96024
%X <div style=\"text-align:justify;\">
	文章基于TDOA (Time Difference of Arrival，到达时间差)实时定位系统中的时钟同步问题，提出了一种交叉互验同步方法，在由Decawave公司提供的DW1000模块上实现TDOA定位系统的软时钟同步设计。考虑到模块的收发特性，同一时刻只能允许一条信号在空间中传输，该方法中包含主基站与从基站和用户标签的通讯协议，对模块之间的通讯时隙进行安排，解决了通讯信号互相干扰的问题。同时，该方法通过对模块间通讯过程进行建模分析，推导出时间戳、时钟频率漂移与时间轴偏差之间满足的线性方程组，将其最小二乘解代入TDOA定位算法，完成一次时钟同步与标签定位。文章提出的方法充分考虑TDOA实时定位系统的需求，具有时延低、实现简单、易于建模分析等优点。<br />
Based on the clock synchronization problem in TDOA (Time Difference of Arrival) real-time positioning system, a cross-recognition synchronization method is proposed. The soft clock synchronization design of TDOA positioning system is implemented on the DW1000 module provided by Decawave. Considering the transceiver characteristics of the module, only one signal can be transmitted in space at the same time. The method includes the communication protocol between the primary base station, the secondary base station and the user tag. The communication time slots between the modules are arranged to solve the problem of interference. At the same time, the method analyzes the communication process between modules to derive the linear equations that are satisfied between time stamp, clock frequency drift and time axis deviation. The least squares solution is substituted into the TDOA positioning algorithm to complete a clock synchronization and positioning with the user tag. The method proposed in the paper fully considers the requirements of TDOA real-time positioning system, and has the advantages of low delay, simple implementation and easy analysis.
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%K 室内定位，TDOA系统，软时钟同步，最小二乘法<br>Indoor Positioning
%K TDOA System
%K Soft Clock Synchronization
%K Least Squares
%U http://www.hanspub.org/journal/PaperInformation.aspx?PaperID=33689