Turbo码嵌入比特交织编码调制系统的一种新的迭代时序方案  

A New Iterative Scheduling for BICM-ID Embedded Turbo Codes

作　　者：王丽耀[1] 李怀军[2] 

机构地区：[1]中国传媒大学,北京100024 [2]国家计算机网络与信息安全管理中心河北分中心,河北050000

出　　处：《中国传媒大学学报（自然科学版）》2013年第2期34-38,共5页Journal of Communication University of China：Science and Technology

摘　　要：在简单的迭代方案中,把两个RSC译码器看成一单个部件,检测器只从第二个RSC译码器中获得先验信息,产生新的输出传递给第一个RSC译码器。这种方案计算复杂度低,但是获得的误码率性能比较差。在传统的迭代方案中,任何一个部件都要从其它两个部件中获取先验信息来产生新的软信息。这种方案虽然获得了较好的误码率性能,但有较高的计算复杂度。本文提出在接收端各组件之间一种新的迭代方案,就是两个RSC译码器之间内部迭代和两个RSC译码器整体跟检测器外部迭代同时进行。跟前两个方案相比,提出的方案达到了性能和复杂度的折中效果。In a simple iteration scheme, the two RSC decoders are treated as a single component. The de- tector only takes the priori information from the second RSC decoder to generate new soft outputs for the first RSC decoder. However,this scheme gets worse BER performance with simple computation complexi- ty. In the conventional iteration scheme, a component takes the priori information provided by the other two components to generate new soft information. However, this scheme has high iterative computation complexity with general BER performance. This paper proposes a new iteration scheduling among the com- ponents in the receiver, in which inner iteration between two RSC decoders and outer iteration between detector and decoders are used simultaneously. Simulation results show that the proposed scheme can a- chieve a good performance and complexity trade - off compared with the simple iteration scheme and the conventional scheme.

关 键 词：比特交织编码调制(BICM) 迭代 检测 译码 TURBO码 

分 类 号：TN921[电子电信—通信与信息系统]