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Canal de Propagation - Martial COULON

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III.2. Influence du Shadowing<br />

sur la couverture d’une cellule<br />

Shadowing<br />

chutes importantes du SNR (surtout en liaison montante)<br />

Conséquences :<br />

• frontières <strong>de</strong> la cellule floues<br />

• phénomène <strong>de</strong> hand-over (ou hand-off)<br />

• perte d’efficacité<br />

• nécessité <strong>de</strong> connaître σ L (modèles empiriques <strong>de</strong> Okumura,…)<br />

25

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