TrackCC: A Practical Wireless Indoor Localization System Based on Less-Expensive Chips.
TrackCC: A Practical Wireless Indoor Localization System Based on Less-Expensive Chips.
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TrackCC：基于较便宜芯片的实用无线室内定位系统
DOI：
10.3390/s17061391
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发表时间：
2017-06-15
期刊：
影响因子：
--
通讯作者：
Yi Y
中科院分区：
文献类型：
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作者：
Li X;Zheng Y;Cai J;Yi Y
本文旨在提出一种名为 TrackCC 的新型无线室内定位系统 (ILS)，基于商业类型的低功耗片上系统 (SoC) nRF24LE1。这类芯片只有l个输出功率电平，并且工作时接收到的最小功率电平波动剧烈，这给定位算法的设计带来了许多实际挑战。为了解决这些挑战，我们利用马尔可夫理论构造一个（l+1）×（l+1）大小的状态转移矩阵来消除波动，然后提出一种基于优先级的模式匹配算法来搜索信号图中最相似的匹配来估计未知节点的真实位置。实验结果表明，与现有的两种具有米级定位精度的无线ILS LANDMARC和SAIL相比，所提出的TrackCC在视距（LOS）和非视距（NLOS）场景下平均可以达到分米级精度。
This paper aims at proposing a new wireless indoor localization system (ILS), called TrackCC, based on a commercial type of low-power system-on-chip (SoC), nRF24LE1. This type of chip has only l output power levels and acute fluctuation for a received minimum power level in operation, which give rise to many practical challenges for designing localization algorithms. In order to address these challenges, we exploit the Markov theory to construct a (l+1)×(l+1) -sized state transition matrix to remove the fluctuation, and then propose a priority-based pattern matching algorithm to search for the most similar match in the signal map to estimate the real position of unknown nodes. The experimental results show that, compared to two existing wireless ILSs, LANDMARC and SAIL, which have meter level positioning accuracy, the proposed TrackCC can achieve the decimeter level accuracy on average in both line-of-sight (LOS) and non-line-of-sight (NLOS) senarios.