Howtosignalprocessing
- What is Rayleigh fading in wireless communication?
- Why is Rayleigh fading channel used?
- What is the difference between Rayleigh and Rician fading?
- What are Rayleigh Ricean fading channels?
What is Rayleigh fading in wireless communication?
Rayleigh fading models assume that the magnitude of a signal that has passed through such a transmission medium (also called a communication channel) will vary randomly, or fade, according to a Rayleigh distribution — the radial component of the sum of two uncorrelated Gaussian random variables.
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.
What is the difference between Rayleigh and Rician fading?
Rayleigh fading is most applicable when there is no dominant line-of-sight propagation between the transmitter and receiver. Rician model considers that the dominant wave can be a phasor sum of two or more dominant signals, e.g. the line-of-sight, plus a ground reflection.
What are Rayleigh Ricean fading channels?
Rayleigh and Rician fading channels are useful models of real-world phenomena in wireless communications. These phenomena include multipath scattering effects, time dispersion, and Doppler shifts that arise from relative motion between the transmitter and receiver.
