高码率Turbo-OVCDM的叠加编码构造  

Construction of High Rate Turbo-OVCDM by Superposition Coding

作　　者：周素华[1] 周晶[2] 张茹[3] 

机构地区：[1]北京邮电大学世纪学院,北京102101 [2]中国科学技术大学电子工程与信息科学系,合肥230027 [3]北京邮电大学民族教育学院,北京102209

出　　处：《北京邮电大学学报》2016年第1期79-82,共4页Journal of Beijing University of Posts and Telecommunications

基　　金：国家自然科学基金项目(61177085;61377097)

摘　　要：为解决Turbo-OVCDM译码复杂度随码率指数增长的问题,提出了一种新的、通用的Turbo-OVCDM编译码方案.该方案包括1)在发送端由2个或多个Turbo-OVCDM低速率码的码字通过直接的叠加编码生成高速率码的码字;2)在接收端通过串行干扰抵消进行译码.与传统的由单个编码矩阵直接构造重叠码分复用方法相比,新方案的译码复杂度大大降低.性能仿真证实了新方案的可行性.The decoding complexity of traditional type of Turbo-overlapped code division multiplexing（ OVCDM） increases exponentially with the code rate. To solve this problem,a new Turbo-OVCDM coding and decoding approach was proposed. The maximum sum-rate achieving strategy in Gaussian multiple access channels was used to construct point-to-point coding scheme. Superposition of two or more TurboOVCDM codes and serial interference cancellation were applied for coding and decoding respectively.Numerical results demonstrate the feasibility of the proposed approach.

关 键 词：重叠码分复用 串行干扰抵消 叠加编码 高斯多址信道 

分 类 号：TN911.22[电子电信—通信与信息系统]