Title: Turbo Code verses Convolutional Code

Year of Publication: March - 2014
Page Numbers: 8-11
Authors: Yousef Hwegy , Manal Saad
Conference Name: The Second International Conference on Green Computing, Technology and Innovation (ICGCTI2014)
- Malaysia

Abstract:


Shannon and Hamming in 1949 have given a powerful techniques for achieving reliable data transmission using coding techniques. In this paper, we analyze the performance of two coding techniques, which are the Convolutional code and the Turbo code. The Convolutional code with Viterbi decoder soft and hard decisions, the turbo code with random interleaver, and the channel is the AWGN, are all considered for the simulation in this work. For the same message length and the same channel distortion the coding techniques considered in this work are compared. This paper demonstrate that Turbo code exhibit a better performance in comparison to the Convolutional code especially at low signal to noise ratio. The Convolutional coding using Viterbi decoder soft decision provides coding gain of 2 dB in comparison to Viterbi decoder hard decision. Also the codec system exhibit a far better performance in comparison to non codec system that uses modulated QPSK only.