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urgent help viterbi decoding

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erece

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Msg 1 1 0 1 0
Tx 11 01 01 00 10
Rx 11 10 01 00 10
Using Viterbi decoding i am not getting the original message .
 

permute

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show what you've done thus far.
basically, you should have 5 steps with 8 values per step. (there are 8 states, 000, 001, 010, ...)

the values are "number of errors required to get to this state."

at the end, you select the lowest number of errors of the 8 final states, then trace the valid state transitions backwards until you get the data. eg, each state can transition to (and transition from) exactly two other states.
 

eeesha

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I dont know how you used the viterbi algorithm. For viterbi to work properly, the traceback depth should be "K*5 for non-punctured viterbi decoder" and "K*7 for punctured viterbi decoder" where K is constraint length. In you case K=3.
 

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