What is Rayleigh flat fading channel?
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.
What is frequency selective fading?
Selective fading or frequency selective fading is a radio propagation anomaly caused by partial cancellation of a radio signal by itself — the signal arrives at the receiver by two different paths, and at least one of the paths is changing (lengthening or shortening).
How is Rayleigh fading related to flat fading?
To be frequency selective fading or flat fading is independent of the distribution of the signal strength being Rayleigh. That only has to do with delay spread. (See figure below). The Delay Spread of the channel is what determines the frequency selectivity of the fading (regardless if it is Rayleigh or not).
Can a Rayleigh distribution be used with frequency selective fading channels?
I Read in one reference that, the Rayleigh distribution is commonly used to describe the statistical time varying nature of the received envelope of a flat fading signal, or the envelope of an individual multipath component. Can Rayleigh and Rician distributions be used with frequency selective fading channels? I need some explanation please
How is flat fading related to frequency selective fading?
The above occurs whether we are dealing with flat fading (the amplitude across the entire signal bandwidth changes as one), or frequency selective fading (the amplitude at particular frequencies within the channel bandwidth is fading independent of the amplitude of other frequencies within the channel bandwidth.
How does Doppler shift affect Rayleigh fading channel?
How rapidly the channel fades will be affected by how fast the receiver and/or transmitter are moving. Motion causes Doppler shift in the received signal components. The figures show the power variation over 1 second of a constant signal after passing through a single-path Rayleigh fading channel with a maximum Doppler shift of 10 Hz and 100 Hz.