从专利角度分析无缝室内外定位技术的发展态势
姜珍,陈伟航,张馥楠,余京宪,闫舒,张茹

Development Situation of Seamless Indoor and Outdoor Positioning from Patent Perspective
Zhen Jiang,Weihang Chen,Funan Zhang,Jingxian Yu,Shu Yan,Ru Zhang
图1 无缝室内外定位领域的全球专利申请趋势