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Channel capacity with simulation

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aliazmat

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channel capacity theorem matlab coding

Hi all,

I have matlab simulation for rayleigh fading with BPSK and have calculated its ergodic capacity with the formula:

C=mean(log2(1+h^2*SNR))

but I want to calculate the actual rate which I am achieving without using above formula, I mean I want to calculate capacity of the same channel with the probability of error, number of bits transmitted, or anything thing else but dont want to use the formula.

I want to see the simulated capacity, not using specific formula ..

Plz help me if you can.......
:cry:
 

Please use MATLAB to implement.
you have to discritize it eg. 0 to 30 db for SNR and than find the capacity.

Actually there is no other way to find the capacity without formulae. The formulae you mentioned is the Capacity formulae of Shannon its absolutely right
 
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    aliazmat

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    yanuar76

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thanks for your reply but there should be some way around .....
 
You need transition probabilities to find the capacity. The attached file about transition probabilities in fading channels may be useful.

Also I attached the book chapter of "Elements of Information Theory" about the channel capacity.
 
I think the response from gaffer would require you to know how to calculate mutual information, and if your decoding is an iterative decoder, I 'd rather say you plot an exit function if you can ( can give some tips here if you wish), and then your xmission rate would simply be A*R*log(2)M

where A is the area underneath your exit function
R is your xmission rate and
M is the ary of modulation e.g QPSK=4, BPSK =2.
 
AOA, I want a MATLAB simulation code of Channel capacity theorem. Kindly help me.
I will wait for your good responce.
 
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