Help Needed on Turbo Codes

[agent_009]

I need help for my final year project on Turbo Codes.

I need a detailed description and diagram for the Decoder. Currently i am doing somulation in MATLAB. I have written code for the decoder. But the problem is that even without adding noise, it does not produce correct result. The component decoders (log map) are fine(i have verified them individually). But the problem seems to be in the information sharing (extrinsic and intrinsic). So i need exact equations for relationships and equations for the extrinsic information and its sharing by the decoders.


Thanx in advance

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[aladin2007]

all you need in the link **broken link removed**

 

[venkat3271]

Make sure ur decoding algorithm is correct and see whether u r giving the interleaved input to the decoder 2..

 

[agent_009]

Thanx a lot ! i needed it about a year ago. Now there is no need of it.

But thanx anyways ...