The attached paper could be a help

Hi Basem, you may already know that the uncertainties have been formalised for each part of communication link. Use of the Statistics within the Matlab framework allows you to introduce the effect of the channel behaviour in your wireless link.

Stochastic process can be applied in order to analyze the QoS of your wireless network at the physical and above layers.

Thank you Professor Habib for the paper

I will check it

Thank you Prof. Kasmi for your reply

I have just begun reading some papers about channel uncertainty . some papers assume uncertainty is modeled as Random variable, some assumes spherical or ellipsoidal-bounded uncertainty