Performance Comparison of RSC-RSC and RS-RSC Concatenated Codes Using Non-iterative Concatenated Viterbi Decoding Technique

In this paper, we conduct performance comparison of RS-RSC concatenated system with RSC-RSC concatenated system. Two models of serially concatenated codes are simulated and tested over AWGN channel using Mat lab simulations. The first model uses Reed-Solomon (RS) code as outer encoder and Recursive convolution code (RSC) as inner one & decoding is performed by concatenation of Viterbi decoder & Berklelamp-Massey decoder. The second model uses Concatenation of Recursive systematic convolution codes (RSC) as outer and inner codes with the help of interleaver. For decoding of RSC-RSC system, we have proposed & implemented a non-iterative decoding scheme which includes two Viterbi decoders in concatenation with de-interleaver. We show that the performance of RSC-RSC concatenated code is better than RS-RSC concatenated code in terms of bit error rate (BER).