An Improved Indoor Positioning System Based on WLAN (original) (raw)
Related papers
Procedia Computer Science, 2014
Indoor positioning has emerged as a hot topic that gained gradual interest from both academia and industry. Accurate estimation is necessitated in a variety of location-based services such as healthcare, repository tracking, and security. Additional equipment for location sensing could be used for accurate estimation, but they are not widely used in general because those alternatives will cause specialization in brands and will be costly. Among all suggestions in literature including hardware and intense sophisticated computations, a versatile and low-cost location determination technology, which uses existing WLAN infrastructure of indoor environments, has been developed without incurring extra charge; this method is rising as a way of positioning. WLAN is capable to be used within an indoor positioning system soon in real environments. It is a good alternative in terms of accuracy, precision and cost, compared to similar systems. Especially with the common usage of smartphones and tablet PCs, it became the most easyto-use method, too. In this paper, we present a brief survey on such systems, methodologies, techniques and discuss advantages and disadvantages of each of these.
A novel positioning system for static location estimation employing WLAN in indoor environment
2004 IEEE 15th International Symposium on Personal, Indoor and Mobile Radio Communications (IEEE Cat. No.04TH8754)
This paper describes a Positioning algorithm that uses the signal strength, received by a Wireless Local Area Network, to determine users position. The system improves positioning accuracy by mitigating the multi-path and noise, through an empirical analysis of environment and a pre-post curser mitigator. Results, in terms of relative error, are presented for indoor environment.
Survey on Wireless Indoor Positioning Systems
Survey on Wireless Indoor Positioning Systems, 2019
Indoor positioning has finally testified a rise in interest, thanks to the big selection of services it is provided, and ubiquitous connectivity. There are currently many systems that can locate a person, be it wireless or by mobile phone and the most common systems in outdoor environments is the GPS, the most common in indoor environments is Wi-Fi positioning technique positioning. The improvement of positioning systems in indoor environments is desirable in many areas as it provides important facilities and services, such as airports, universities, factories, hospitals, and shopping malls. This paper provides an overview of the existing methods based on wireless indoor positioning technique. We focus in this survey on the strengths of these systems mentioned in the literature discordant with the present surveys; we also assess to additionally measure various systems from the scene of energy efficiency, price, and following accuracy instead of comparing the technologies, we also to additionally discuss residual challenges to correct indoor positioning.
Comparison of Performance Evaluation of Several WLAN Positioning Systems
In this paper we evaluate the performance of several indoor positioning systems published in the literature in real and complex scenarios. We include in the comparison the evaluation of our new system for which we study the accuracy and precision in three different scenarios. The impact of AP configuration on our system is also analyzed. Since most of the existing performance evaluations do not consider the environment size and the AP interference, here we use the method of comparison proposed in paper (1) which is more realistic and flexible. The comparative results demonstrate that our system achieves accuracy that is similar to the best existing one.
On Potentials and Limitations of a Hybrid WLAN-RFID Indoor Positioning Technique
International Journal of Navigation and Observation, Hindawi, special issue "Integrating Radio Positioning and Communications: New Synergies", Vol. 2010, 11 pages, 2010
This paper addresses the important issue of position estimation in indoor environments. Starting point of the research is positioning techniques that exploit the knowledge of power levels of RF signals from multiple 802.11 WLAN APs (Access Points). In particular, the key idea in this paper is to enhance the performance of a WLAN fingerprinting approach by coupling it to a RFIDbased procedure. WLAN and RFID technologies are synergistically used to provide a platform for a more performing positioning process, in which the very strong identification capabilities of the RFID technology allow to increase the accuracy of positioning systems via WLAN fingerprinting. The algorithm performance is assessed through general and repeatable experimental campaigns, during which the main algorithm parameters are dimensioned. The results testify both to the feasibility of the solution and to its higher accuracy (attainable at very reduced costs) compared to traditional positioning techniques.
Indoor Positioning System: A Review
International Journal of Advanced Computer Science and Applications
Global Positioning System (GPS) has been developed in outdoor environments in recent years. GPS offers a wide range of applications in outdoor areas, including military, weather forecasting, vehicle tracking, mapping, farming, and many more. In an outdoor environment, an exact location, velocity, and time can be determined by using GPS. Rather than emitting satellite signals, GPS receivers passively receive them. However, due to No Line-of-Sight (NLoS), low signal strength, and low accuracy, GPS is not suitable to be used indoors. As consequence, the indoor environment necessitates a different Indoor Positioning System (IPS) approach that is capable to locate the position within a structure. IPS systems provide a variety of location-based indoor tracking solutions, such as Real-Time Location Systems (RTLS), indoor navigation, inventory management, and first-responder location systems. Different technologies, algorithms, and techniques have been proposed in IPS to determine the position and accuracy of the system. This paper introduces a review article on indoor positioning technologies, algorithms, and techniques. This review paper is expected to deliver a better understanding to the reader and compared the better solutions for IPS by choosing the suitable technologies, algorithms, and techniques that need to be implemented according to their situation.
Performance investigation of WifiLOC positioning system
2011
The paper deals with performance evaluation of the indoor positioning solution based on utilization of IEEE 802.11 network and fingerprinting method. It is called WifiLOC and it is implemented as a mobile-assisted positioning system. The architecture of the system is presented. WifiLOC is based on the fingerprinting method, which utilizes signal strength information for position estimation. A lot of factors influence the propagation of radio signals in indoor environment. This fact also significantly impacts on properties of the positioning systems. In the paper, the impact of the positioning accuracy is presented various conditions such as moving objects in the observed area or the type of indoor environment, e.g. corridor, office and room, are taken into account. The influence of different conditions during the off-line and the on-line phase of fingerprinting method on the positioning accuracy is also investigated.
Wireless Position Location System for Indoor Environments
2007
Location systems are used for a variety of navigation applications. Current Location systems are designed to provide accurate distance position coordinates. There are tracking or logistic applications where actual position coordinates are not necessary. Determining the room in a building an object is located can be more useful then the actual coordinates. We present an inexpensive and robust wireless location beacon network that can track the location of emergency responders or users in an indoor environment. Location beacons are placed at predetermined positions in a building. The location beacons are used to determine the presence of the user in an area of a building. The location beacon network does not track the user's coordinates. The location beacon network uses the ZigBee/802.15.4 wireless communications protocol. Our paper examines the use of the Zigbee protocol to determine a user’s location. Two realtime location tracking mechanisms are also analysed and tested. A succ...
Indoor location technologies - An Overview
Apart from being extremely dependent on GNSS (GPS, GLONASS, GALLILEO, etc.) technologies for outdoor positioning, an indoor positioning technology can vary mainly due to dynamic environment. Indoor positioning systems in past year are becoming more and more popular because it’s easier to deploy than ever, due to the growing use of the smartphones. This small devices are equipped with sensors which can sense move, inclination, speed, signal strength … Despite of that, the domination of single indoor technology has not yet being achieved, thus the paper will present each technology, principles and approaches, it will be pointed out some system combinations and it will present some available products as examples. Finally, some pros and cons during research are noted as well as prediction in terms of domination of certain systems.