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Medium Wave Digital Radio Mondiale (DRM) Field Strength Time Variation in Different Reception Environments

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7 Author(s)
Guerra, D. ; Dept. of Electron. & Telecommun., Univ. of the Basque Country, Bilbao ; Gil, U. ; de la Vega, D. ; Prieto, G.
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This paper examines the temporal variability in fixed reception of the ground-wave propagated DRM (Digital Radio Mondiale) signal. This field strength analysis in the medium wave band has been performed using the first Spanish DRM field trial. Several fixed reception points located along radial routes provided the field strength sample distributions in rural and suburban areas. Additionally a second measurement campaign was carried out in several dense and open areas of downtown Madrid. The maximum likelihood estimations and logarithmic functions were used to analyse the fit of the experimental data with theoretical statistical distributions. A deep analysis of the most important parameters of the distribution has been carried out in order to characterize the field strength behavior in the different reception situations. It has been taken into account the influence of environment, measurement time interval, distance to the transmitter and the presence of critical reception impairments. The most remarkable result of this study has shown that the time variability of the ground-wave medium wave DRM channel is well approximated by a Log Normal and also by a Nakagami process. The Log Normal distribution is preferred as it is the one considered by the analog medium wave broadcasts for the ground-wave propagation case

Published in:

Broadcasting, IEEE Transactions on  (Volume:52 ,  Issue: 4 )

Date of Publication:

Dec. 2006

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