What is flat fading and frequency selective fading.

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Accepted Answer

Flat fading is when the entire frequency band experiences the same amount of fading. Frequency selective fading is when different frequencies experience different amounts of fading.

Flat fading occurs when the signal experiences the same amount of attenuation across the entire frequency band.
Frequency selective fading occurs when different frequencies experience different amounts of attenuation.
Flat fading can be caused by reflection, diffraction, or scattering of the signal.
Frequency selective fading can be caused by multipath propagation or interference.
Flat fading can be mitigated by using diversity techniques such as frequency diversity or space diversity.
Frequency selective fading can be mitigated by using equalization techniques such as frequency domain equalization or time domain equalization.