Page 320 - Integrated Wireless Propagation Models

298 C h a p t e r F i v e

North 4th to 2nd Floor
78
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80
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82
84
co * � -
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c *
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Cil
a_
92
94
96

98
0.7 0.8 0.9 1.2 1.3 1.4 1.5 1.6 1.7 X
Distance between Tx and Rx in meter (dec scale) ( 1 0 x in meters)
(c)
South 2nd to 4th Floor

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(/) 85 . .
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95 L_ --� __ __ _L __ __ L_ __ __ __ __ __ __ __ __ __ __
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1.4
1.5
0.7 0.8 0.9 � _L 1.3 __ L_ � _L � 1.7 X
1 . 1
Distance between Tx and Rx in meter (dec scale) ( 1 0 x in meters)
(d)
FIGURE 5.3.2.2.1.1 (Continued )
When the transmitter and the receiver are separated on different floors, the path
loss is due to the two components: one from the diffraction loss, and the other from
the penetration loss. However, it is very hard to distinguish which component contrib­
utes the most at a certain location. Therefore, we just use the measured data from
many sources/·32 -36 including our measured data, to come up with an empirical model.