In many communication systems, turbo codesare employed to repair errors. Turbo codes demonstrate high error correction when compared to other error correction methods. A Very Large Scale Integration is suggested in this study. VLSI architecture for the Turbo encoder implementation, Interleaves and de interleaves, and soft-in-soft-out decoders are employed. This study employs a technique that for the encoder portion, includes two recursive systematic convolutional (RSC) encoders , a Block interleaver and the decoder part involve Soft Output Virtebi Algorithm(SOVA) decoder. Aconvolutional code is a sort of error-correcting code used incommunicationsthat creates parity signals by sliding a Boolean polynomial function across a data stream. The word "convolutional coding" comes from the sliding application, which depicts the encoder's "convolution" acrossthe data. Convolutional codes sliding properties make it easier to do trellis decoding with a time-invariant trellis. Convolutional codes can be maximum-likelihood soft-decision decoded with a manageable level of complexity thanks to time invariant trellis decoding. The Viterbi algorithm, also known as the Viterbi path, is a dynamic programming approach for determining the greatest probability estimate of the most probable series of hidden states that leads to a series of observed events. The quantity of times needed to decode the bits is been reduced in this methodology. A block interleaver accepts a set of symbols and rearranges them, without repeating or omitting any of the symbols in the set. The number of symbols in each set is fixed for a given interleaver. Turbo encoding, as well as decoding simulations are done using Modelsim software.

Keywords : Turbo Codes; Interleaver; Viterbi Algorithm; SOVA.