TrackCC: A Practical Wireless Indoor Localization System Based on Less-Expensive Chips

Sensors

卷:17

Yunfei Yi¹  Jun Cai²  Xiaolong Li³  Yan Zheng³ 

[1] The Department of Computer and Information Engineering, Hechi University, Hechi 546300, China;

[2] The Department of Electrical and Computer Engineering, University of Manitoba, Winnipeg, MB R3T 5V6, Canada;

[3] The School of Computer Science and Information Security, Guangxi Key Laboratory of Trusted Software, Guilin University of Electronic Technology, Guilin 541004, China;

关键词: wireless indoor localization system;    signal fluctuation;    discrete power outputs;    pattern matching;    cheap communication chip;   

DOI  :  10.3390/s17061391

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown