Practical Decoding Structure of Turbo Code Based on Max-Log-MAP Algorithm
Feng Shu · Journal of Jinling Institute of Technology · 2006
One simplified practical decoding structure of Turbo codes based on Max-Log-MAP algorithm is presented.A Max-Log-MAP algorithm is discussed and simplified. Based on analysis of the differences between Max-Log-MAP and maximum a posteriori(MAP) algorithm,a scale factor(SF) is adopted to scale the extrinsic information of the decoders in the Max-Log-MAP based iterative decoding process. One practical decoding algorithm,SF-Max-Log-MAP,is then introduced.The simulation shows that the decoding performance of this algorithm is better than that of Max-Log-MAP,when a reasonable SF has been selected.