Howtosignalprocessing
- What is frequency selective fading channel?
- What is Rayleigh fading and how it affects the channel performance?
- What is meant by Rayleigh fading channel?
- How Rician fading channel is different from Rayleigh fading channel?
What is frequency selective fading channel?
The time-varying gain of the channel output is also frequency dependent. When channels are time-varying and also dependent on frequency, they are called frequency-selective fading channels. Such channels are characterized by time-varying ISI, and thus require complex equalization.
What is Rayleigh fading and how it affects the channel performance?
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 meant by Rayleigh fading channel?
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.
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.
