What is the difference between these two Rayleigh fading channels?

Both channels are generated in Matlab with the same sample rate (10^9). For the first channel, PathDelays = 1.0 e-06 * [0.1050 0.2100 0.3150 0.4200] and AveragePathGains = [0 -6 -9 -12]. For the second channel, PathDelays = 1.0 e-06 * [0 0.3149 0.2534 0.4454] and AveragePathGains = [0 0 0 0]. Below are their respective channel impulse and frequency responses.

Channel 1:

Impulse response:

Frequency response:

Channel 2:

Impulse response:

Frequency response:

How can one verbally express the difference between these two channels? Is the second one a more selective channel for example?

Thank you for your help!

Answer 1

[Rangesh]

Hello,

I understand that you want to know about the characteristics of fading channels. However, when it comes to fading, attenuation is an inherent attribute of such fading channels. Consequently, it would be inaccurate to label the second channel as a fading channel. Additionally, the classification of the selective channel you mentioned depends on the signal's bandwidth.

To gain a better understanding of fading, I suggest referring to the following links:

• https://www.rfwireless-world.com/Articles/Fading-basics-and-types-of-fading-in-wireless-communication.html
• https://www.rfwireless-world.com/Terminology/Flat-fading-vs-Frequency-Selective-Fading.html

I hope this resolves your query.

Thanks,

Rangesh.