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The aim of this paper is the path loss modeling for the radiolocation services in radiocommunication networks, particularly in cellular networks. The main results of the measurements obtained in the physical layer of the UMTS are introduced. A new method for the utilization of the multipath propagation phenomenon to improve the estimation of the distance between the mobile station (MS) and the base...
At present the most popular navigation system in the world is Global Positioning System (GPS). As it is managed by the Department of Defence of the U.S.A., there is always the risk of the occasional inaccuracies or deliberate insertion of errors, therefore this system can not be used by secret services or armies of countries other than the U.S.A. This situation has engender a need for development...
Since first travels by land or sea, it was necessary to determine position in an unknown environment. At the beginning methods were simple. They were based on the observation of characteristic points, in the case of shipping additional observations of the coastline. Then came a navigation based on astronomical methods (astronavigation). At the beginning of the XX-century a new way of determining the...
The article focuses on performance of Global Navigation Satellite System (GNSS) receivers in environment where intentional interference is present. First part is a general description of the GNSS systems. Secondly, types of positioning service disturbances are specified. Next, a scheme of measurement setup, which is used to evaluate the influence of interference disturbances on reception of navigation...
The concept of wireless system of threats monitoring with self-organizing network of multipurpose data transfer nodes are presented. Two practical applications of this system are also presented. The first of these is the Global Wireless Monitoring System for Containers, and the second is the Mobile Monitoring System for Gas Air Pollution Measurements.
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