直接时差计数超宽带标签定位系统

构建了一种新的超宽带标签定位系统．该方案采用一个独立时差计数器统一记录标签信号到达各基站的时间差，故基站间无须严格同步的参考时钟，避免了因参考时钟起点不同步带来的测量误差，从而在有效地提高定位精度的同时降低了系统实现复杂度．对所提定位方案进行了测量误差分析和仿真验证，结果表明，在IEEE 802.15.4a给出的室内多径信道中，系统定位性能优于基站间未严格同步的传统到达时间差方案，适合应用于低功耗、低成本的室内超宽带定位和跟踪系统．

UWB location system based on direct-recording time difference

An approach to the construction of the tag location system based on the Ultra-Wideband signal is presented.The proposed scheme does not require strict synchronization among the base stations since it introduces an independent counter to record the time differences of arrival(TDOA).The proposed scheme can avoid the error caused by the asynchronous reference time and improve the location accuracy.Error analysis and simulation results are given.The simulation results show that in the proposed IEEE 802.15.4a ch...