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Plils: A Practical Indoor Localization System through Less Expensive Wireless Chips via Subregion Clustering
Xiaolong Li1,2, Yifu Yang3, Jun Cai4
1Key Laboratory of Hunan Province for New Retail Virtual Reality Technology, Hunan University of Commerce, Changsha 410205, China. xlli@guet.edu.cn.
Sensors (Basel, Switzerland)
|January 13, 2018
Summary
This study introduces Plils, a cost-effective indoor localization system using common wireless chips. Plils achieves 75 cm accuracy, making indoor localization technology more accessible.
Area of Science:
- Electrical Engineering
- Computer Science
- Ubiquitous Computing
Background:
- Indoor Localization Systems (ILSs) are often expensive due to specialized hardware.
- Reducing costs is crucial for widespread adoption of indoor localization technology.
- Commercial off-the-shelf (COTS) wireless chips offer a potential low-cost solution.
Purpose of the Study:
- To propose a novel, low-cost indoor localization system (Plils) utilizing a COTS wireless chip.
- To investigate the effectiveness of power level-based localization.
- To achieve accurate and robust indoor positioning.
Main Methods:
- Developed Plils, an indoor localization system based on the Nordic Semiconductor nRF24LE1 chip.
- Employed a self-organizing map (SOM) for area division in the offline phase.
- Utilized support vector machine (SVM) and back propagation (BP) neural networks for online localization.
Main Results:
- Plils achieves an average accuracy of 75 cm.
- The system demonstrates robustness against indoor obstacles.
- The study discusses optimal parameter selection for the number of subregions (k).
Conclusions:
- Plils offers a cost-effective alternative to conventional ILSs.
- The proposed power level-based approach is viable for indoor localization.
- This technology can significantly promote the widespread use of indoor localization.
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