An angular distribution of received signals has a significant impact on their spectral and correlational properties. Most of angular dispersion models do not consider antenna patterns. The developed procedure for determining the propagation path parameters enables a wide range of assessment of the impact of the propagation environment on the received signal properties. In contrast to the other models, this procedure is based on a geometrical structure, which parameters are defined on the basis of power delay profile or spectrum This modeling method allows also the power radiation pattern (PRP) of the transmitting antenna. The aim of the paper is to present the influence of the transmitter antenna PRP on the scattering propagation paths that arrive at the receiver. This analysis is realized on the basis of simulations studies using the developed procedure. Presented in this paper procedure maps the effects of propagation phenomena that predominate in an azimuth plane.Index Terms-propagation, multi-elliptical model, angular distribution, angle of arrival (AOA), probability density function (PDF) of AOA, rms angle spread, antenna pattern, power radiation pattern, azimuth plane, modeling, simulation.I.
Satellite navigation is now widely used in a land, sea, and air transport. It is easy to forecast the negative effects related to the lack of a signal of the Global Navigation Satellite System (GNSS), especially in the aviation and maritime traffic. In 20th century they were allayed the terrestrial navigation systems, e.g. Decca, Omega, Loran-C. Recently, only eLoran is used, as a backup system for GNSS. The Polish Defense Ministry plans to develop a new navigation system that should provide positioning data for the Polish Navy ships that will carry out combat missions in coastal areas, regardless of GNSS. This paper presents the concept of a reserve navigation system (RNS) that is based on the signal Doppler frequency (SDF) location method. Effectiveness of RNS is shown on the basis of simulation studies. Obtained results indicate the possibility of the vessel positioning on the basis of signals from one or more radio beacons of the system.
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