This paper takes the actual scene of Aletheia University campus – the Class 2 national monument, the first educational institute in northern Taiwan as an example, to present a 3D virtual navigation system which supports user positioning and pre-download mechanism. The proposed system was designed based on the principle of Voronoi Diagra) to divide the virtual scenes and its multimedia informati...

Indoor navigation systems must deal with absence of GPS signals, since they are only available in outdoor environments. Therefore, indoor systems have to rely upon other techniques for positioning users. Recently various indoor navigation systems have been designed and developed to help visually impaired people. In this paper an overview of some existing indoor navigation systems for visually i...

To predict the impact of ionospheric scintillations on communications, navigation, and space radar systems it can be useful to simulate the RF conditions under which these systems must operate. GNSS satellites broadcast radio signals that can be monitored by receivers on the ground to specify scintillations at multiple frequencies in the L band range. In this paper, we describe an inverse diffr...

Global satellite navigation systems such as GPS enable precise tracking of vessels worldwide and pervasive global networks such as the Internet allow sharing of this information almost instantaneously between locations anywhere on Earth. This ability to monitor vessels globally is a topic of current debate among those concerned with national security, those who are mainly interested in safety a...

Although outdoor navigation systems are mostly dependent on GPS, indoor systems have to rely upon different techniques for localizing the user, due to unavailability of GPS signals in indoor environments. Over the past decade various indoor navigation systems have been developed. In this paper an overview of some existing indoor navigation systems for visually impaired people are presented and ...

mobile robot navigation is one of the basic problems in robotics. in this paper, a new approachis proposed for autonomous mobile robot navigation in an unknown environment. the proposedapproach is based on learning virtual parallel paths that propel the mobile robot toward the trackusing a multi-layer, feed-forward neural network. for training, a human operator navigates themobile robot in some...

Inertial navigation systems are of the most important and practical systems in determining the velocity, position and attitude of the vehicles and different equipment. In these systems, three accelerometers and three gyroscopes are used to measure linear accelerations and angular velocities of vehicles, respectively. By using the output of these sensors and special inertial algorithms in differ...

In this study, the problem of navigation in dynamic and unknown environment is investigated and a navigation method based on force field approach is suggested. It is assumed that the robot performs navigation in...

The system was originally developed to provide visually impaired people with a navigation device which could be used independently indoors and outdoors, without any pre-installed infrastructure. TANIA utilizes a movement sensor, a GPS sensor, and detailed maps of the current environment. Its maps are augmented by guiding grids to insure safe navigation even in large open areas without physical ...

During previous CSUN conferences we presented the navigation system TANIA (Tactile-Acoustical Navigation and Information Assistant). The system’s main component is an Ultra Mobile PC and it achieves positioning of the user via an accurate step-tracking method, GPS, and RFID tags, and works both indoors and outdoors. Besides providing information about the surrounding area by an integrated tacti...