scholarly journals Supporting Process of Independent Navigation Inside Buildings Based on Low-Energy Bluetooth Transmitters

2021 ◽  
Author(s):  
Tomasz Żochowski
Keyword(s):  
Visually Impaired ◽  
Satellite Navigation ◽  
Low Energy ◽  
Navigation Systems ◽  
Open Spaces ◽  
Positioning Systems ◽  
Confined Spaces ◽  
Satellite Positioning ◽  
Satellite Navigation Systems ◽  
Electronic Support

Thanks to the use of satellite positioning systems (including GPS) the ability to determine a user's position in open spaces has become a necessary element of everyday life. Nowadays people cannot imagine moving in an "urban jungle” with paper maps without electronic support, but dozens of years ago those maps were more popular than satellite navigation. A similar revolution may also await navigations in closed spaces such as public or commercial buildings. Because as the urbanisation process, the surfaces of various buildings grow, which significantly impedes orientation in them, especially for the blind or visually impaired users. As satellite navigation systems are burdened with errors, which increase when trying to use them in confined spaces, it becomes necessary to use more accurate technology. As a step towards solving this problem, we propose a solution supporting the navigation of users, especially the visually impaired, inside buildings. Our approach is based on using low energy Bluetooth transmitters and a method of determining the user's position using the trilateration algorithm and the appropriate placement of transmitters in a space.

Satellite Positioning Methods

2000 ◽  
Author(s):  
Vidal Ashkenazi ◽  
Chris Hill
Keyword(s):  
Doppler Shift ◽  
First Generation ◽  
Satellite Navigation ◽  
Navigation Systems ◽  
Similar System ◽  
Positioning Systems ◽  
Satellite Navigation System ◽  
Satellite Positioning ◽  
Satellite Navigation Systems ◽  
Processing Techniques

In the previous chapter, positioning was examined from a historical perspective, recognizing that in many parts of the world, such data are not just useful, they are frequently the only data available. But in many areas, the case for extending the limits of the continental shelf will be dependent on the acquisition of new data, and for the most part, this will mean the use of satellite navigation systems. Therefore, this chapter deals in some detail with current and future satellite navigation and positioning systems. The first generation of satellite navigation systems used the principle of the Doppler shift of transmissions from satellites to provide measurements of a user's position. The Doppler shift of an emitted signal is related to the relative velocity between the source of the signal and the point at which it is received. The apparent frequency of the received signal is increased when the emitter is moving toward the receiver, and decreased when it is moving away. This phenomenon can often be observed in everyday situations, such as when a vehicle drives past a pedestrian. The pitch of the sound from the vehicle appears to drop as it passes the pedestrian, due to the transition from increased to decreased frequency of the sound. In satellite Doppler systems, measurements of the Doppler shift of signals from the satellites are combined with knowledge of the satellite's position and velocity (its ephemeris), to give an indication of the receiver's position. TRANSIT was the first operational satellite navigation system (see chapter 7). Data-processing techniques were developed which allowed a receiver to be located with respect to another at a known location, to an accuracy of the order of 1 m. TRANSIT ceased operation as a position and timing system at the end of 1996. A similar system to TRANSIT was developed by the Soviet Navy in 1965. The system, known as TSIKADA, is still operational today (2000). Since satellite Doppler systems rely on the accumulation of measurements over a period of time to provide a useful measure of a receiver's position, they could not be used as true real-time satellite navigation systems (see chapter 7).

scholarly journals Method of Dynamic Selection of Satellite Navigation System in the Autonomous Mode of Positioning

2019 ◽  
Vol 18 (2) ◽  
pp. 302-325 ◽  
Author(s):  
Sergey Popov ◽  
Vladimir Zaborovsky ◽  
Leonid Kurochkin ◽  
Maksim Sharagin ◽  
Lei Zhang
Keyword(s):  
Single Channel ◽  
Weather Conditions ◽  
Satellite Navigation ◽  
Transport Systems ◽  
Navigation Systems ◽  
Positioning Systems ◽  
Navigation Data ◽  
Satellite Positioning ◽  
Differential Corrections ◽  
Satellite Navigation Systems

Today, the list of applications that require accurate operational positioning is constantly growing. These tasks include: tasks of managing groups of Autonomous mobile robots, geodetic tasks of high-precision positioning, navigation and monitoring tasks in intelligent transport systems. Satellite navigation systems are a data source for operational positioning in such tasks. Today, global and local satellite navigation systems are actively used: GPS, GLONASS, BeiDou, Galileo. They are characterized by different completeness of satellite constellation deployment, which determines the accuracy of operational positioning in a particular geographical point, which depends on number of satellites available for observation, as well as the characteristics of the receiver, landscape features, weather conditions and the possibility of using differential corrections. The widespread use of differential corrections at the moment is not possible due to the fact that number of stable operating reference stations is limited - the Earth is covered by them unevenly; reliable data networks necessary for the transmission of differential corrections are also not deployed everywhere; budget versions of single-channel receivers of the navigation signal are widely used, which do not allow the use of differential corrections. In this case, there is a problem of operational choice of the system or a combination of satellite positioning systems, providing the most accurate navigation data. This paper presents a comparison of static and dynamic methods for selecting a system or a combination of satellite positioning systems that provide the most accurate definition of the object's own coordinates when using a single-channel receiver of navigation signals in offline mode. The choice is made on the basis of statistical analysis of data obtained from satellite positioning systems. During the analysis, the results of post-processing of data obtained from satellite navigation systems and refined with the use of differential corrections of navigation data were compared.

Optimal Processing of Information from Inertial and Satellite Navigation Systems by Analysis after Flight

2001 ◽  
Vol 56 (3) ◽  
pp. 13
Author(s):  
E. G. Kharin ◽  
V. G. Maslennikov ◽  
N. B. Vavilova ◽  
I. A. Kopylov ◽  
A. Ch. Staroverov
Keyword(s):  
Satellite Navigation ◽  
Navigation Systems ◽  
Optimal Processing ◽  
Satellite Navigation Systems

REVIEW OF SATELLITE-FREE NAVIGATION SYSTEMS

2018 ◽  
pp. 20-24
Author(s):  
M. K. Savkin ◽  
A. R. Filatov
Keyword(s):  
Satellite Navigation ◽  
Navigation Systems ◽  
Military Operations ◽  
Advantages And Disadvantages ◽  
Working Principle ◽  
Satellite Signal ◽  
Satellite Navigation Systems ◽  
Insufficient Number

Nowadays majority of navigation methods, used in unmanned flying vehicles, are based on satellite navigation systems, such as GPS or GLONASS, or are amplified with them. But hardware, that uses such systems, can’t work in difficult conditions, for example causes by relief: with insufficient number of satellites or at low satellite signal. Satellite navigation systems are vulnerable for methods of radio defense: satellite signal can be deadened or replaced. That is why such systems usage is unacceptable while critical missions during military operations, emergency or reconnaissance. The article briefly describes components used for building alternative satellite-free navigation systems for flying vehicles. For each component its purpose and brief description of working principle are given, advantages and disadvantages are considered.

Assessment of the Potential of Satellite Navigation Systems for Europe Results of a Study for the European Commission

1994 ◽  
Vol 47 (3) ◽  
pp. 295-304
Author(s):  
Hubert Stich ◽  
Walter Blanchard ◽  
Wolfgang Lechner ◽  
Detlef Kayser ◽  
Henry Gaillard
Keyword(s):  
European Commission ◽  
Satellite Navigation ◽  
Navigation Systems ◽  
Satellite Navigation Systems

This paper and the following five papers were presented at the DSNS-94 Conference organized by the Institute from 18–22 April in London. The full proceedings, including some 78 papers, are available from the Director, price £40 (exc. P&p).

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