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

Guerra, D.; Gil, U.; Vega, David; Arrinda, Amaia; Ordiales, J.L.; Angueira, Pablo

doi:10.1109/tbc.2006.883304

Cited by 14 publications

(12 citation statements)

References 4 publications

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“…building areas [4,38,39] (this is especially sensitive for the 900-kHz emission located on top of a hill with the surrounding city environment) but also by the variations of the conductivity between the value that appears in the theoretical conductivity map and the real value that exists in the environment.…”

Section: Theoretical and Experimental E Field Mapsmentioning

confidence: 99%

“…G round wave propagation is a widely studied field of knowledge in radio propagation of electromagnetic signals from both a theoretical [1][2][3] and an experimental [4,5] point of view. The frequency band, where we study the surface wave, the medium wave (MV), and around 1 MHz, is characterized mainly by propagation via ground and sky waves [6][7][8][9]; nevertheless, we focus on the first due to the size of the area and the location of the transmitters on it.…”

Section: Introductionmentioning

confidence: 99%

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2DE-WAVE Tool for Computing Theoretical Field Levels at MF & HF band and Comparison with Experimental Values in a Real Environment

Pachón-García

2015

IEEE Antennas Propag. Mag.

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This paper presents a study of electric field values at medium wave in an area of 160 Â 160 km 2 , analyzing it under a theoretical point of view and contrasting the results with values from experimental campaigns. The implemented application is named 2-Dimensional Electric-Wave (2DE-WAVE), and it is based on the GRWAVE program from the ITU for flat land but incorporates the Millington method for mixed paths. The obtained results show the importance of characterizing the terrain with accurate conductivity and permittivity values due to the high influence that these parameters have on the electric field. When comparing theoretical and experimental values, we observed that, in general terms, they agree well for not very rough terrains but with certain field fluctuations, particularly in "shadow areas" either by the presence of buildings or remarkable topographical irregularities. Absolute mean errors of theoretical versus experimental values between 2.4 and 2.9 dB with deviations of 2.8 and 3.3 dB were obtained in an area of 20 Â 25 km 2 surrounding the transmitters, which reaffirm us the need to validate the simulation values with field measurements. Illustrative maps of the difference between theoretical and experimental electric field values are also shown.

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Section: Theoretical and Experimental E Field Mapsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

2DE-WAVE Tool for Computing Theoretical Field Levels at MF & HF band and Comparison with Experimental Values in a Real Environment

Pachón-García

2015

IEEE Antennas Propag. Mag.

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“…Although the results are not comparable, tests in Brazil showed that the use of spectral shaping technique allowed the use of lower protection ratio (12 dB despite 16 dB in Mexico), achieving good results of digital reception. Also it should be considered that this kind of field tests [11,12,[15][16][17] allow raising planning parameters according to each environment, so the Brazilian field tests are a new dataset.…”

Section: Introductionmentioning

confidence: 99%

Medium wave DRM field trials in Brazil – Some daytime and nighttime results in urban environment

et al. 2012

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“…As the ground-wave is assumed TABLE I TRANSMITTER FEATURES to have no variability, these curves provide only median values [3]. However the experience from different field trials [4] showed that this assumption was optimistic in urban environments. As a consequence, the unforeseen variability could cause the signal strength to decrease below the threshold value.…”

Section: Introductionmentioning

confidence: 99%

“…Up to now, time and spatial variability have been studied in rural areas [4], [5], but only time variability has been dealt with as regards urban environments. Hence, spatial variability in urban environments in the MW band needs to be analyzed [6].…”

Section: Introductionmentioning

confidence: 99%

Statistical Characterization of Medium Wave Spatial Variability Due to Urban Factors

Gil

Peña

Guerra

et al. 2011

IEEE Trans. Antennas Propagat.

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The recently developed digital radio systems for the medium wave (MW) band require accurate field strength prediction methods for coverage calculi. Traditional prediction methods do not consider the influence of urban factors on MW ground-wave propagation. This influence causes signal strength time and spatial variability which in turn, provoke drop-outs below reception threshold values. In this letter the ground-wave spatial variability is statistically analyzed in urban environments by means of empirical data from four extensive field trials. The experiments were carried out in different urbanenvironmentsandatdifferentfrequenciesoftheMWband.Priortothe analysis, long-term and short-term components of the signal were separated by means of the generalized Lee method (GLM). The results show the attenuation caused by different urban factors. These attenuation values should be added to the signal strength predicted median values in order to ensure correct reception.Index Terms-Coverage prediction, medium wave (MW) , propagation models, signal variability, urban environments.

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

Cited by 14 publications

References 4 publications

2DE-WAVE Tool for Computing Theoretical Field Levels at MF & HF band and Comparison with Experimental Values in a Real Environment

2DE-WAVE Tool for Computing Theoretical Field Levels at MF & HF band and Comparison with Experimental Values in a Real Environment

Medium wave DRM field trials in Brazil – Some daytime and nighttime results in urban environment

Statistical Characterization of Medium Wave Spatial Variability Due to Urban Factors

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

Cited by 14 publications

References 4 publications

2DE-WAVE Tool for Computing Theoretical Field Levels at MF &amp; HF band and Comparison with Experimental Values in a Real Environment

2DE-WAVE Tool for Computing Theoretical Field Levels at MF &amp; HF band and Comparison with Experimental Values in a Real Environment

Medium wave DRM field trials in Brazil – Some daytime and nighttime results in urban environment

Statistical Characterization of Medium Wave Spatial Variability Due to Urban Factors

Contact Info

Product

Resources

About

2DE-WAVE Tool for Computing Theoretical Field Levels at MF & HF band and Comparison with Experimental Values in a Real Environment

2DE-WAVE Tool for Computing Theoretical Field Levels at MF & HF band and Comparison with Experimental Values in a Real Environment