New Iterated Decoding Algorithm Based on Differential Frequency Hopping System  

作　　者：梁富林 罗伟雄 

机构地区：[1]School of Information Science and Technology, Beijing Institute of Technology, Beijing100081, China [2]School

出　　处：《Journal of Beijing Institute of Technology》2005年第1期27-31,共5页北京理工大学学报（英文版）

摘　　要：A new iterated decoding algorithm is proposed for differential frequency hopping (DFH) encoder concatenated with multi-frequency shift-key (MFSK) modulator. According to the character of the frequency hopping (FH) pattern trellis produced by DFH function, maximum a posteriori (MAP) probability theory is applied to realize the iterate decoding of it. Further, the initial conditions for the new iterate algorithm based on MAP algorithm are modified for better performance. Finally, the simulation result compared with that from traditional algorithms shows good anti-interference performance.A new iterated decoding algorithm is proposed for differential frequency hopping (DFH) encoder concatenated with multi-frequency shift-key (MFSK) modulator. According to the character of the frequency hopping (FH) pattern trellis produced by DFH function, maximum a posteriori (MAP) probability theory is applied to realize the iterate decoding of it. Further, the initial conditions for the new iterate algorithm based on MAP algorithm are modified for better performance. Finally, the simulation result compared with that from traditional algorithms shows good anti-interference performance.

关 键 词：differential frequency hopping (DFH) maximum a posteriori (MAP) non-coherent detection 

分 类 号：TN911[电子电信—通信与信息系统]