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Markov Modeling of First and Second Order Statistics of Land Mobile Satellite Fading

Markov Modeling of First and Second Order Statistics of Land Mobile Satellite Fading,Balázs Héder,László Csurgai-Horváth,János Bitó

Markov Modeling of First and Second Order Statistics of Land Mobile Satellite Fading   (Citations: 1)
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For accurate planning of microwave links the knowledge of the peculiar characteristics of the radio channe l e.g the CCDF (Complement Cumulative Distribution Function) of attenuation or the fade duration statistics are ver y important. This information helps us to set the fade margin co rrectly. In this work Markov models are provided with which the modeling of these first and second order statistics of attenuation is possible. To demonstrate the modelin g methods we considered land mobile satellite channel , where the received signal level is highly influenced by t he multi- path fading and the signal shadowing. The Land Mobile Satellite Channel Wave propagation on a LMS (land mobile satellite) channel is highly influenced by the signal shadowin g effect of buildings or the vegetation and by the multi pat h fading. This type of fading occurs because the signal suffe rs from multiple reflections on obstacles in the surroundin gs; therefore the signal is received not only via the d irect path. The characteristics of the fading highly depend on the environment. For accurate planning of a land mobile satellite link the ability of estimating the CCDF o f attenuation and of the fade duration on the propose d links is very important. In order to examine the channel characteristics of the land mobile satellite channel DLR performed data measurement between 1984 and 1987 on land mobile satellite channel in different environments (1). Th e parameters of measurements are listed in Table 1. Both of the links are operating in the 1.54 GHz frequency band but the circumstances of the measurements were different. Either of them was performed in a highway environment with cruising van velocity of 60 km/h and the measurement took 81.2 minutes, while the other took 27.8 minutes in urban area with velocity of 10 km/h. The applied satellite was the geostationary satellite MARECS.
Published in 2006.
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