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2/3 rate Punctured Veterbi Decoder

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mann4uonlyed

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I have used xilinx blockset in simulink to make 1/2 rate convolutional Encoder and also merged it with Viterbi Decoder.

Now I need to make 2/3 rate convolutional coder and Viterbi decoder using xilinx blockset with puncturing method.

As i am doing puncturing in convolutional encoder the output is verified. I am using punctured matrix [10]
[11]
And I have compared the result of punctured convolutional encoder with standard convolutional encoder. Result is correct. It is deleting each first bit of odd encoded symbol.

Now for decoding purpose i am depuncturing the encoded data by inserting o bit at the deleted positions.
this is also checked and result is fine.

Now this data i am giving to Viterbi decoder with erased bit high at the dummy bit.

But decoded data is not correct.

Please help.

Thanks
 

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