Implementation of Convolution Encoder and Viterbi Decoder for Constraint Length 7 and Bit Rate 1/2

摘要

Convolutional codes are non blocking codes that can be designed to either error detecting or correcting. Convolution coding has been used in communication systems including deep space co mmunication and wireless communication. At the receiver end the original message sequence is obtained from the received data using Viterbi decoder. It implements Viterbi Algorithm which is a maximum likelihood algorithm , based on the minimum cumulative hamming distance it decides the optimal trellis path that is most likely followed at the encoder. In this paper I present the convolution encoder and Viterbi decoder for constraint length 7 and bit rate 1/2