July 2003
Intermediate to advanced
576 pages
11h 51m
English
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5.3. Channel Attenuation Model
In an inside home environment, the field strength of a radio wave can be enhanced by reflections from surrounding walls and attenuated by barrier walls. These effects can be included by introducing a modification factor into the free space field strength expression. The modified field strength estimation formula is
Equation 5.28
where L is the modification factor whose value could be smaller than one for the effect of reflection enhancement or larger than one for the effect of barrier attenuation.
The amount of reflection enhancement can be estimated with knowledge of the room: the wall enclosure, room dimension, ...
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