差分跳频系统串行级联编码器的设计与改进译码  

Serially Concatenated Code Design and Modified Decoding of Differential Frequency Hopping Systems

作　　者：梁富林[1] 罗伟雄[1] 

机构地区：[1]北京理工大学信息科学技术学院电子工程系,北京100081

出　　处：《北京理工大学学报》2004年第5期427-430,共4页Transactions of Beijing Institute of Technology

摘　　要：针对短波差分跳频系统,设计RS码与差分跳频G函数串行级联的编码系统.差分跳频G函数内码采用改进的最大后验算法译码,大大简化了译码复杂度,改善了系统的误码性能,交织采用40×40块交织器,外码RS(15,9)采用BerlekampMassey译码算法.仿真结果表明,本算法克服了传统短波差分跳频G函数译码的缺点,系统性能得到较大改善.RS concatenated with differential frequency hopping G function encoder is proposed for HF differential frequency hopping system. In order to improve the error code rate performance, modified MAP algorithm is applied to the inner decoder of differential frequency hopping G function. (40×40) block weave encoder is used and the outer code is decoded by the Berlekamp Massey algorithm. Simulation results show that the new algorithm overcomes the shortcomings of conventional systems, and that the performance of this differential frequency hopping system is greatly improved.

关 键 词：差分跳频 G函数 最大后验概率算法 RS码 

分 类 号：TN014[电子电信—物理电子学]