This a Viterbi Decoding Algorithm Trace Back algorithm. Very useful for decoding in communication channel. the Survivor path is taken to be four bits. We have taken 4 states here. The branch metrics are calculates accordingly.All the signals have been tested here.The test_bench module is also included. We have taken care of the fact that encoded output goes continuously here.-This is a Viterbi Decoding Algorithm Trace Back algorithm. Very useful for decoding in communication channel. the Survivor path is taken to be four bits. We have taken 4 states here. The branch metrics are calculates accordingly.All the signals have been tested here.The test_bench module is also included. We have taken care of the fact that encoded output goes continuously here.