Experimental Study of Bluetooth Indoor Positioning Using RSS and Deep Learning Algorithms

Chunxiang Wu, Ieok-Cheng Wong, Yapeng Wang (), Wei Ke and Xu Yang
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Chunxiang Wu: Faculty of Applied Sciences, Macao Polytechnic University, Macao, China
Ieok-Cheng Wong: Faculty of Applied Sciences, Macao Polytechnic University, Macao, China
Yapeng Wang: Faculty of Applied Sciences, Macao Polytechnic University, Macao, China
Wei Ke: Faculty of Applied Sciences, Macao Polytechnic University, Macao, China
Xu Yang: Faculty of Applied Sciences, Macao Polytechnic University, Macao, China

Mathematics, 2024, vol. 12, issue 9, 1-21

Abstract: Indoor wireless positioning has long been a dynamic field of research due to its broad application range. While many commercial products have been developed, they often are not open source or require substantial and costly infrastructure. Academically, research has extensively explored Bluetooth Low Energy (BLE) for positioning, yet there are a noticeable lack of studies that comprehensively compare traditional algorithms under these conditions. This research aims to fill this gap by evaluating classical positioning algorithms such as K-Nearest Neighbor (KNN), Weighted K-Nearest Neighbor (WKNN), Naïve Bayes (NB), and a Received Signal Strength-based Neural Network (RSS-NN) using BLE technology. We also introduce a novel method using Convolutional Neural Networks (CNN), specifically tailored to process RSS data structured in an image-like format. This approach helps overcome the limitations of traditional RSS fingerprinting by effectively managing the environmental dynamics within indoor settings. In our tests, all algorithms performed well, consistently achieving an average accuracy of less than two meters. Remarkably, the CNN method outperformed others, achieving an accuracy of 1.22 m. These results establish a solid basis for future research, particularly towards enhancing the precision of indoor positioning systems using deep learning for cost-effective, easy to set up applications.

Keywords: BLE indoor positioning; received signal strength; convolutional neural network (search for similar items in EconPapers)
JEL-codes: C (search for similar items in EconPapers)
Date: 2024
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