Abstract
This paper deals with propagation modelling for GSM-system performance estimation in urban micro-cells (transmitting antenna below the roofs’ level) at 900 MHz. First we recall a simple relation between GSM average bit error rate (ber) and wideband fast fading distribution laws. We then analyse the fast fading statistics over a gsm bandwidth from wideband power measurements. We proved it to well fit to the Nakagami distribution in most cases. At last we derive curves for average performance of gsm from the estimated m-parameters of the Nakagami distribution function which can be useful for a coverage quality prediction model and network planning. The cases of line of sight and non line of sight propagation were analysed separatelly.
Résumé
Cet article présente une étude relative à la modélisation de la propagation pour l’évaluation de la qualité gsm en microcellules (antennes d’émission sous les toits) à 900 MHz. Après avoir rappelé une relation simple entre la probabilité d’erreur moyenne et la statistique des évanouissements rapides en bande large, les distri butions statistiques susceptibles de modéliser les évanouissements rapides en bande gsm sont analysées à partir de mesures de puissance en bande large. Il ressort que dans la plupart des cas la loi de Nakagami est bien adaptée. Des courbes de qualité moyenne du gsm, en visibilité et en non-visibilité sont déduites des estimations du paramètre m de la loi de Nakagami. Ces courbes peuvent être utiles pour des modèles de prévision de la qualité de la couverture et pour la planification du réseau gsm en microcellules.
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Guillet, V., Pajusco, P. Propagation measurements and modelling for GSM-system performance estimation in urban microcells at 900 MHz. Ann. Télécommun. 52, 476–482 (1997). https://doi.org/10.1007/BF02998476
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DOI: https://doi.org/10.1007/BF02998476
Key words
- Electromagnetic wave propagation
- Land mobile service
- gsm
- Cellular network
- Fading
- Experimentation
- Statistical analysis
- Statistical model
- Transmission performance