摘要
提出了一种实用简化的Max-Log-MAP算法Turbo码译码结构。讨论并进一步简化了一种Max-Log-MAP算法;在分析比较了其与MAP算法区别的基础上,引入尺度因子SF用以修正Max-Log-MAP迭代译码过程中的译码器输出外部信息,提出了一种实用的译码算法SF-Max-Log-MAP。仿真表明,在合理选取SF时,该算法的译码性能明显优于Max-Log-MAP算法。
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.
出处
《金陵科技学院学报》
2006年第3期30-33,共4页
Journal of Jinling Institute of Technology
基金
东南大学移动通信国家重点实验室开放研究基金课题(N200609)
