INDOOR POSITIONING DEVICE AND METHOD BASED ON WIFI SYSTEM

摘要

Provided are an indoor positioning device and method based on a WIFI system, the method comprising: transmitting, by a user equipment (UE), a measurement signal to at least four access points (AP); determining arrival time of the measurement signal arriving at each AP; determining a first AP from the at least four APs as a first standard AP; determining a distance difference value between each first non-standard AP and the first standard AP according to the first standard AP and the arrival time of each AP; and determining an estimated value of a coordinate of the UE according to the distance difference value between each first non-standard AP and the first standard AP, thus avoiding a large error when randomly selecting the AP for positioning, reducing an effect of the spatial arrangement of the AP on positioning error, and increasing the precision of UE positioning.