The aim of this research is to implement a precise Wi-Fi indoor positioning system (IPS) or localization based upon the IEEE 802.11mc fine-timing measurement (FTM) scheme also known as round trip time (RTT) ranging technique, where refers sub-process that determines distance between transmitter and receiver. Our its algorithms were implemented using COTS (Commercial-Off-The-Shelf) smartphone ac...

In this contribution we derive an expression of the Cramér-Rao bound for hybrid cooperative positioning, where GNSS information is combined with terrestrial range measurements through exchange of peer-to-peer messages. These results provide a theoretical characterization of achievable performance of hybrid positioning schemes, as well as allow to identify critical network configurations and dev...

To realize dynamic positioning of the shearer, a new method based on SINS/WSN is studied in this paper. Firstly, the shearer movement model is built and running regularity of the shearer in coal mining face has been mastered. Secondly, as external calibration of SINS using GPS is infeasible in enclosed underground mine, WSN positioning strategy is proposed to eliminate accumulative error produc...

To improve the mobile performance of the robot. Establishing the automatic positioning system of mobile robot based on RFID and information fusion technology. The paper described the development of mobile robot, introduced the relative theory of the robot technology, established the mathematical model of the positioning system, and constructed the mobile robot positioning platform based on RFID...

This paper presents an empirical study of e-tailers’ Internet positioning. Using a sample of 138 US webbased businesses and 20 positioning variables, the paper analyzes the visibility of e-tailers’ web pages, their relevance in search engines, their reputation in shopping portals and their popularity in blogs and news portals. Principal component analysis is used to conduct an exploratory exami...

This paper evaluates the positioning performance of a single-frequency software GPS receiver using Ionospheric and Tropospheric corrections. While a dual-frequency user has the ability to eliminate the ionosphere error by taking a linear combination of observables, a single-frequency user must remove or calibrate this error by other means. To remove the ionosphere error we take advantage of the...

This paper focuses on to identify the limits and insufficiencies in utilising Network Real-Time Kinematic Global Navigation Satellite Systems (NRTK GNSS) and its augmentation techniques in a precise positioning in a realtime navigation system related to visually impaired people. The purpose was to improve the positioning performance and ensure the availability of reliable and highly accurate po...

Spatial relationships are crucial to spatial knowledge representation, such as positioning localities. However, minimal attention has been devoted to positioning localities indoors with locality description. Distance and direction relations are generally used when positioning localities, namely, translating descriptive localities into spatially explicit ones. We propose a joint probability func...

Self-localisation has become a matter of course in our daily life. The emerging market of mobile devices still boosts the demand for seamless, ubiquitous positioning. The repertoire of sensors serviceable for localisation provided by current mobile devices is large; however the main positioning systems used today are based on wireless local area networks (WLAN), cellular networks and certainly ...

The works presented in this article are motivated by the high performances required in micromanipulation/microassembly tasks. For that, this paper presents the developement, the modelling and the control of a 2 degrees of freedom (in linear and angular motion) micropositioning device. Based on the stick-slip motion principle, the device is characterized by unlimited strokes and submicrometric r...