ABSTRACT\
Turbo codes are widely used in satellite communication and 3G services. These are the major area of research in these days. Turbo codes are the forward error correcting codes that has made the near Shannon limit performance possible when suboptimal iterative decoding algorithms are used. The classical turbo encoder is built by using two recursive convolution encoders separated by an interleaver. In this paper we have implemented a system in which data is first encoded using turbo encoder and then using AWGN channel it is transferred to decoder where it is decoded using iterative soft input soft output decoder and the performance of the decoder with respect to the number of iterations has been discussed in the result section of this paper. Also, how the bit error rate changes with respect to the number of iteration is been discussed.
