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bee
Joined: 29 Nov 2003
Posts: 126
Helped: 2
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 17 Jan 2008 6:32 Capacity of 1 tap freq selective channel??? |
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Hi,
I know that for system y(t) = h * x(t) + n (t) the capacity is
C = log2 ( 1 + (Po/No)*hh')
can anyone plz tell me the capacity formula for system with following equation
y(t) = x(t) * h1 + x(t-1) * h2 + h3*n(t-1) + n(t). --------------(1)
where n(t) is noise and n(t-1) is delayed noise.
x(t) is transmiited signal and x(t-1) is delayed transmitted signal
y(t) is recieved signal.
h1,h2 and h3 are quasi staic flat fading channels.
Also the above eq (1) can be conisdered as 1 tap freq selective channel.
Waiting......
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changfa
Joined: 14 Dec 2005
Posts: 270
Helped: 81
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| 05 Mar 2008 1:00 Re: Capacity of 1 tap freq selective channel??? |
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Now you need to look at the problem from frequency domain. Basically, you will end up with an integral over frequency with the intergrand in the form of log(1+something).
It is not a new problem and if I remember correctly, you can find the exact answer in text book by T.Cover or by R.Gallager.
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alonemrt
Joined: 09 Mar 2008
Posts: 10
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| 11 Mar 2008 11:41 Re: Capacity of 1 tap freq selective channel??? |
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| Capacity of 1 tap freq selective channel???
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