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Viterbi algoritm
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Viterbi algorithm is utilized to decode the convolutional codes . Again the decoding can be done in two approaches. One approach is called hard decision decoding which uses Hamming distance as a metric to perform the decoding operation, whereas, the soft decision decoding uses Euclidean distance as a metric. As stated in one of the previous posts the soft decision decoding improves the performance of the code to a significant extent compared to the hard decision decoding. Viterbi Algorithm (VA) decoding involves three stages, namely, 1) Branch Metric Calculation 2) Path Metric Calculation 3) Trace back operation
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