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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(More)
This paper presents two methods for detection DS CDMA signals hidden in the noise are described. The proposed methods are based on analysis of an averaged spectrum of the signal and an averaged spectrum of signal raised to the power 2<sup>n</sup>. These methods are difficult to use when narrowband signals are presented in an analysing frequency band.(More)
The efficiency analysis a hyperbolic position location estimation in the multipath propagation environment in the wideband code division multiple access (WCDMA) interface was presented. Four, the most popular methods: Chan's [1], Foy's [2], Fang's [3] and Friedlander's [4] were considered. These algorithms enable the calculation of the geographical position(More)
The paper presents a prototype of a mobile monitoring system for measuring the levels of the main traffic air pollutants (C(6)H(6), NO(2), NO(x), CO, and CO(2),) in cities. The novelty of the proposed system lies in the fact that it can be utilized to monitor emissions from urban traffic along roads and areas where traditional monitoring stations cannot be(More)
This paper presents a description of new global monitoring system for containers, with its layer-modular structure, as a solution for enhance security and efficiency of container transport with particular emphasis on the practical implementation of that system for maritime container terminals. Especially the Smart Container Module (SCM) architecture and its(More)
  • J. Stefanski
  • 2008
Two efficiency methods for a location service (LCS) by use the wideband code division multiple access (WCDMA) interface, in the frequency division duplex (FDD) mode, are outlined. The LCS in the WCDMA/FDD technique is based on the actual relative time differences (RTDs) between base stations of the monitoring cellular network. The proposed methods enable(More)
Nowadays the accuracy of existing location methods in networks is insufficient, particularly in emergency calls. Modification of chosen algorithm parameters leads to improvement of the accuracy of an MS position estimation. The most important parameter, which decides on location accuracy of an MS, is a true value of distance between a mobile station and a(More)