https://ieeexplore.ieee.org/iel7/8634808/8647127/08647916.pdf
Z Li, X Zhao, Z Zhao, F Hu, H Liang, T Braun - 2018
Crowdsensing indoor walking paths based on crowdsourcing traces collected from normal users has recently become an emerging topic for indoor positioning, which can reduce the labor effort of building radio maps and improve positioning accuracy …