Using Virtual Reference Tags to Improve the Accuracy of Active RFID-Based Positioning Systems

2014 ◽  
Author(s):  
Saber Seyyedi ◽  
Behzad Akbari ◽  
Esmaeil Arab ◽  
Iraj Ramezani ◽  
Milad Mahdavi
Keyword(s):  
Virtual Reference ◽  
Positioning Systems ◽  
Active Rfid ◽  
Reference Tags

An Accurate Indoor RSSI Localization Algorithm Based on Active RFID System with Reference Tags

2017 ◽  
Vol 97 (3) ◽  
pp. 3811-3829 ◽  
Author(s):  
Noor Baha Aldin ◽  
Ergun Erçelebi ◽  
Mahmut Aykaç
Keyword(s):  
Localization Algorithm ◽  
Active Rfid ◽  
Rfid System ◽  
Reference Tags

scholarly journals A Virtualization Approach to Correct Systematic Errors in Measured TDOA and FDOA for Low Orbit Dual-Satellite Positioning Systems

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Gang Li ◽  
Min Zhou ◽  
Hongwen Tang ◽  
Hongbin Chen
Keyword(s):  
Systematic Errors ◽  
Time Difference ◽  
Frequency Difference ◽  
Reference Station ◽  
Virtual Reference ◽  
Time Difference Of Arrival ◽  
Positioning Accuracy ◽  
Positioning Systems ◽  
Location System ◽  
Measured Time

The low-orbit dual-satellite passive location system provides a cost-efficient and easy implementation platform, by which positions of unknown emitters on the Earth can be determined through measuring both the time and the frequency differences by two low-orbit satellites in space. However, in reality, this dual-satellite location system has low positioning accuracy because of the existence of systematic errors. In this paper, in order to address the problem of low positioning accuracy in low-orbit dual-satellite systems, a virtualization approach, consisting of the establishment of the virtual reference station and virtual frequency conversion, is proposed to correct systematic errors in the system. Specifically, we first analyze the coming source of systematic errors in the dual-satellite location system, and then, a virtual reference station and virtual frequency are constructed to correct errors in the measured time difference of arrival and the frequency difference of arrival, respectively. Simulation results show that systematic errors caused by the measured time difference of arrival can be significantly reduced, and the correction efficiency, defined as a ratio between remaining errors after implementing the proposed method over uncorrected ones, for the measured frequency difference of arrival, largely relies on both the virtual frequency and the transmission frequency of reference stations.

The RFID Indoor Positioning Algorithm Based on Lagrange Interpolation

2014 ◽  
Vol 998-999 ◽  
pp. 947-950
Author(s):  
Hui Bao ◽  
Jiu Ying Zhi
Keyword(s):  
Radio Frequency Identification ◽  
Linear Interpolation ◽  
Virtual Reference ◽  
Indoor Location ◽  
Original Algorithm ◽  
Reference Tags ◽  
Frequency Identification ◽  
Location Methods ◽  
Positioning Algorithm ◽  
Better Than

This paper analyzes two classic indoor location methods based on Radio Frequency Identification (RFID),LANDMARC and VIRE,and presents a location method based on the lagrange interpolation.Make up for the inadequacy of VIRE algorithm uses linear interpolation to get the virtual reference tags signal strength value lead to inaccurate positioning.Then making improvement to weight definition to make it more accurately reflect the weight of each selected nearest label to get more accurate positioning results. The experimental results show that the improved algorithm is better than the original algorithm has better positioning results and stability.

Real-Time Precise IOT Positioning System Based on Chirp Spread Spectrum Technology for Transportation

2015 ◽  
Vol 713-715 ◽  
pp. 983-986
Author(s):  
Wei Wang ◽  
Sen Hou ◽  
Mei Ling Lu ◽  
Song Liu
Keyword(s):  
Real Time ◽  
Spread Spectrum ◽  
Functional Independence ◽  
Positioning System ◽  
Practical Application ◽  
Positioning Systems ◽  
Active Rfid ◽  
Comprehensive Performance ◽  
Chirp Spread Spectrum ◽  
Position Monitoring

Real-time precise IOT positioning system based on CSS uses the way of bus or Ethernet with wireless CSS network. With its unique CSS technology to measure the distance, the console can achieve real-time communication and position monitoring of personnel and goods. The system has better comprehensive performance than active RFID, Zigbee and WiFi positioning systems and other technology on the market currently. The functional independence of its communication system makes it easy for the practical application and extensions, and the system has wide application value.

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