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viterbi decoder

Altera_Forum
Honored Contributor II
‎08-24-2009 10:52 AM
1,178 Views

Hi all 

 

I'm trying to test the Viterbi decoder, but for some reason I can't get it to work. 

 

I'm using parallel implementation with continuous optimization  

traceback= 105 

soft bits = 1 

N = 2 

L = 7 

GA = 91 

GB = 121 

 

when I input a random stream or even a square wave I get a random output. 

if I input a constant I get the constant back. 

I've built my encoder the same way as ilustrated in the user guide (with adaptation of course to my GA and GB) 

 

does anyone has any ideas on what can go wrong? 

 

thanks in advance
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