Post by raul on Nov 26, 2006 7:22:25 GMT -5
hi,
i need to ask you question as to how we can qualify random processes as ergodic(it is said those random processes that have the delta function in the power spectral density are not ergodic ? please explain a bit ) and why power spectral density is the fourier transform of the autocorellation function autocorelation function can give us the corelation between two random variables but what does it mean to be composed of sinusoidal signal in the approximation. secondly please inform me about the fast and slow fading channels , i know it has to do with the doppler spread which is caused by the motion of the mobile user then why we qualify channels as slow and fast fading and why we cant use equalizers for slow fading channels.
please help!
best regards
raul
i need to ask you question as to how we can qualify random processes as ergodic(it is said those random processes that have the delta function in the power spectral density are not ergodic ? please explain a bit ) and why power spectral density is the fourier transform of the autocorellation function autocorelation function can give us the corelation between two random variables but what does it mean to be composed of sinusoidal signal in the approximation. secondly please inform me about the fast and slow fading channels , i know it has to do with the doppler spread which is caused by the motion of the mobile user then why we qualify channels as slow and fast fading and why we cant use equalizers for slow fading channels.
please help!
best regards
raul