Tightly-coupled integration of acoustic signal and MEMS sensors on smartphones for indoor positioning
CHEN Ruizhi, GUO Guangyi, YE Feng, QIAN Long, XU Shihao, LI Zheng
Acta Geodaetica et Cartographica Sinica . 2021, (2): 143 -152 .  DOI: 10.11947/j.AGCS.2021.20200551