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$Definition of reflection refraction and diffraction$

Now you understand diffraction has what affect on a wireless signal’s propagation?.

Multipath propagation results in small-scale fading.

Time dispersion caused by multipath delays.

Random frequency modulation due to Doppler Shifts on different multipath signals.

Rapid changes in signal strength over a short distance or time.

Multipath causes three major things in wireless communication

These fluctuations are not the same as the propagation path loss.

Multipath propagation causes large and rapid fluctuations in a signal.

Multipath Propagation in wireless communication

Sometimes this includes a direct Line-of-Sight (LOS) signal Diffuse reflection is responsible for the ability to see most illuminated surfaces from any positionrays reach the eyes after reflecting off every portion of the surface.

Due to propagation mechanisms, multiple waves arrive at the receiver.

Small objects such as street lights, signs, & leaves cause scattering.

Scattering Occurs when a wave impinges upon an object with dimensions on the order of l or less, causing the reflected energy to spread out or“scatter” in many directions.

It's easy to think about waves as if they just move in a straight line, but we have good evidence that this is often simply not true. The behavior of waves can sometimes be counterintuitive.

Diffraction gives rise to bending of waves around the obstacle. Andrew Zimmerman Jones Updated on NovemHuygen's principle of wave analysis helps you understand the movements of waves around objects.

Secondary “wavelets” propagate into the shadowed region.

Diffraction Occurs when the path is blocked by an object with large dimensions relative to l and sharp irregularities (edges).

$definition of reflection refraction and diffraction$ $definition of reflection refraction and diffraction$

Reflections occur from the surface of the earth and from buildings and walls.Dimensions of the surface are large relative to l.

$definition of reflection refraction and diffraction$

Reflections Occurs when a wave impinges upon a smooth surface.

$Definition of reflection refraction and diffraction$