Passive IoT-based positioning systems are low-cost and taggable,making them suitable for scenarios that require the positioning of a large number of targets.Traditional passive IoT positioning is mostly applied to indoor scenarios such as asset management,material tracking.With the emergence of cellular passive IoT,passive IoT posi-tioning technology will have a broader range of applications.On the basis of analyzing the principles and characteris-tics of different positioning technologies,the latest research progress of passive IoT positioning was introduced,and the passive IoT positioning technologies were summarized into three categories:geometrical measurement-based posi-tioning methods,fingerprint feature-based positioning methods,and imaging technology-based positioning methods,according to their implementation principles.In view of the fact that most of the current research adopted the data ob-tained under the traditional passive IoT architecture and protocol for localization,the future development direction of passive IoT positioning technology was analyzed from three dimensions:architectures,protocols and data.The aim is to provide new ideas for researching passive IoT positioning technology.
维普
万方数据