High-resolution indoor positioning system using SDR modules
High-resolution indoor positioning system using SDR modules
复制标题
使用SDR模块的高分辨率室内定位系统
DOI：
10.1109/rws.2015.7129765
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
A. Omar
中科院分区：
文献类型：
--
作者：
Abdo Gaber;Samir Prcanovic;A. Omar
在这项工作中，研究了在多径通信信道中使用单个发射机和多个接收基站（BSs）估计宽带正交多载波信号的到达时差（TDOA）问题。每个BS都有自己的射频前端，包括本地振荡器，滤波器，混频器，放大器等。因此，时间延迟的精确估计是不可能的。因此，应该实现一种完全同步BSs的技术。使用外部参考来提供时钟频率和采样时间对于完美同步的网络是不够的。相位不确定度应通过校准估计的tdoa来校准。利用软件定义无线电（SDR）模块构建了一个真实的系统，根据IEEE 802.11ac系统参数对所提出的无线室内定位系统的性能进行了测试。结果表明，在使用20 MHz带宽时，二维室内无线定位精度可达3 cm。
In this work, the problem of estimating the time difference of arrival (TDOA) associated with wideband orthogonal multi-carrier signals in multipath communication channels has been investigated using a single transmitter and a number of receiving base stations (BSs). Each BS has its own RF front-end including the local oscillator, filters, mixers, amplifiers, etc. Consequently, a precise estimation of time delays is not possible. Therefore, a technique to fully synchronize the BSs should be implemented. Using external reference to provide the clock frequency and sample time is not enough for a perfectly synchronized network. The phase uncertainties should be aligned by calibrating the estimated TDOAs. The software defined radio (SDR) modules are used to build a real system to measure the performance of the proposed wireless indoor positioning system using IEEE 802.11ac system parameters. Results show that an accuracy in the range of 3 cm can be achieved for 2 D wireless indoor positioning by using 20 MHz bandwidth.