Flat rayleigh fading

1. What is Rayleigh flat fading?
2. Is Rayleigh fading flat fading?
3. What is flat fading?
4. What causes Rayleigh fading?

What is Rayleigh flat fading?

Rayleigh fading is a model that can be used to describe the form of fading that occurs when multipath propagation exists. In any terrestrial environment a radio signal will travel via a number of different paths from the transmitter to the receiver. The most obvious path is the direct, or line of sight path.

Is Rayleigh fading flat fading?

Rayleigh channel

This is also an FIR model. h_1 = 1/sqrt(2)*[randn(1,N) + j*randn(1,N)] ; % Rayleigh channel creates the coefficients h of length N representing the channel, where N is the number of data samples. This is a flat fading Rayleigh channel because the number of taps = 1.

What is flat fading?

Flat fading occurs when symbol length is significantly longer than the maximum excess delay. In this case, signal amplitude remains essentially constant for the duration of each symbol but the value of the amplitude and symbol phase changes over short distances.

What causes Rayleigh fading?

Rayleigh fading is caused by multipath reception. The mobile antenna receives a large number, say N, reflected and scattered waves. Because of wave cancellation effects, the instantaneous received power seen by a moving antenna becomes a random variable, dependent on the location of the antenna.