23.10.2014 Views

Canal de Propagation - Martial COULON

Canal de Propagation - Martial COULON

Canal de Propagation - Martial COULON

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

Corrélation Série<br />

Coefficient <strong>de</strong> corrélation :<br />

ρ ( r)<br />

s<br />

E<br />

[ S S ] E[ S S ]<br />

11 12<br />

11 12<br />

= ≈<br />

2<br />

(si r assez petit)<br />

σ<br />

1σ<br />

2<br />

σ<br />

L<br />

• indique la vitesse <strong>de</strong> variation du shadowing qd le mobile se déplace<br />

• modèles exponentiels<br />

Corrélation Site-à-Site<br />

Coefficient <strong>de</strong> corrélation :<br />

ρ ( r)<br />

i<br />

=<br />

E<br />

[ S S ]<br />

11<br />

σ σ<br />

1<br />

2<br />

21<br />

• indique l’importance du rapport Signal/Interférence<br />

• effet important sur la capacité du système<br />

• pour le moment, pas <strong>de</strong> modèles très performants<br />

27

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!