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¼Ò°³±Û Wireless. ±× Áß¿¡¼­µµ ÆäÀ̵ù(fading) Çö»ó¿¡ ´ëÇØ
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½ÇÇè°á°úµµ Æ÷ÇÔ.
¸ñÂ÷ What is fading?

Mathematical expressions for the fading channels.

Experiments

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º»¹®³»¿ë What is fading?
Mathematical expressions for the fading channels.
Experiments
Free space
What is free space?
- In the free space, the RF frequency energy does not be affected by absorption, reflection, and refraction.
Path loss = Ls(d) = (4¥ðd / ¥ë )2
ver
the length of propagation signal.
Three mechanisms.
Diffraction : Radio path is obstructed by a dense body with large dimensions compared to ¥ë
Reflection : Electromagnetic wave impinges on a smooth surface which has vary large dimensions compared to the wave length(¥ë)
Scattering : Radio wave impinges on either a large rough surface or any surface whose dimensions are similar to the ¥ë or less than ¥ë.
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