Turbo Coding Scheme based on Serially Concatenated Rate 3/4, 16 State Convolutional Codes for Fading Channel

The corruption of the transmission signal in the channel has always been a cause of worry for communication engineers, especially in the multipath environment where it necessitates the additional processing in order to mitigate the errors those creep in because of the fading effect created due to this multipath phenomenon. Various Forward Error Correction (FEC) Schemes have evolved over a period of time such as Block Codes, Convolutional codes, TCM Codes and in the recent past Turbo Coding Schemes have become more popular due to its high performance. In this paper the use of turbo coding scheme based on Serially Concatenated Convolutional Codes (SCCC) has been presented for achieving the better BER in respect of fading channel. A design of convolutionalencoder of rate 3/4, 16 states has been presented which forms the integral part of the Turbo Coder. The performance analysis of this turbo coding scheme has been undertaken in respect of fading environment. The complete analysis has been undertaken in MATLAB. The fading channel has been simulated through Rician Multipath Model and the performance of the proposed Turbo Coding Scheme has been compared with the performance of the Convolutional coding Scheme for the same convolutional encoder and with the uncoded 8PSK. The performance of the same has also been evaluated in the case of AWGN channel.