RFID-based Indoor Positioning System Design

Location information is an important basic data.Today,under the strong support of Internet of things,large data and other technologies,the location information is more and more important,and widely used by all people.Due to the particularity of the indoor environment,the existing outdoor locating technology(such as: GPS,etc.)is difficult to apply to the indoor environment.So it is very important that research and design for the indoor environment of the locating system.Based on the deep research on RFID technology,this paper designs and implements an RFID-based indoor locating system with EN-NRF51822 development platform.The specific work includes: 1)analyze the advantages and disadvantages of existing locating technology and locating algorithm;2)according to the characteristics of RSSI instability,it is proposed to use Gaussian filter to achieve correction to establish a more accurate indoor signal transmission model;3)based on EN-NRF51822 development platform,the signal propagation model indoor is established,and the locating algorithm is designed.Finally,the system is tested and analyzed,and the results show that the system can meet the requirements,is feasible.