WIFI indoor positioning method and device and medium

• Main Authors: LI KEJIAN, ZHUGE LIQIANG, LIN HEYUN, LUO XUAN, LAN TIANBAO, WEI ZHIWEI, JIANG YE, TANG YUAN, CAO JIALI, PENG SHUNJIE, ZHANG ZHIHAI, PAN XINHONG, HUANG GUOLUN, DU JIANHE
• Format: Patent
• Language: Chinese; English
• Published: 04.07.2023
• Subjects: CALCULATING; COMPUTER SYSTEMS BASED ON SPECIFIC COMPUTATIONAL MODELS; COMPUTING; COUNTING; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; PHYSICS; WIRELESS COMMUNICATIONS NETWORKS

The invention discloses a WIFI indoor positioning method and device and a medium, and relates to the technical field of indoor positioning. The method comprises the following steps: a user side receives channel state information with multipath components; constructing an indoor WIFI auxiliary system signal model according to the channel state information; according to an indoor WIFI auxiliary system signal model, carrying out vectorization processing on the collected channel state information; according to a traditional compressed sensing technology, a vectorization processing result is gridded; calculating channel state information corresponding to each path; and the estimated values of the user side position and the indoor scattering point position are obtained by using the three-dimensional geometrical relationship. By using an off-grid sparse Bayesian learning algorithm, angle and time information of each path can be jointly estimated at a user side, and accurate channel state information estimation and u