Conceptual Question on equalization technique in rayleigh fading channel based on a paper

1. In which of the following scenarios will the assumption of Rayleigh fading channel be valid?
2. How do you overcome Rayleigh fading?
3. Why is Rayleigh fading channel used?
4. How Rician fading channel is different from Rayleigh fading channel?

In which of the following scenarios will the assumption of Rayleigh fading channel be valid?

Rayleigh fading is most applicable when there is no dominant propagation along a line of sight between the transmitter and receiver.

How do you overcome Rayleigh fading?

To overcome the effects of Rayleigh fading in a mobile environment, sequential tone signalling may be used (DTI, 1981b). Here a unique single tone corresponding to each digit is sequentially transmitted, together with a unique 'repeat' tone in place of the digit tone in the case of repeated digits.

Why is Rayleigh fading channel used?

The Rayleigh fading model can be used to analyse radio signal propagation on a statistical basis. It operates best under conditions when there is no dominant signal (e.g. direct line of sight signal), and in many instances cellular telephones being used in a dense urban environment fall into this category.

How Rician fading channel is different from Rayleigh fading channel?

Rayleigh fading is sometimes considered a special case of Rician fading for when there is no line of sight signal. In such a case, the Rician distribution, which describes the amplitude gain in Rician fading, reduces to a Rayleigh distribution.