基于Turbo迭代算法的LDPCC-CPM系统接收机设计  

Design of a receiver for LDPCC-CPM system based on Turbo principle

作　　者：薛睿[1] 赵旦峰[1] 肖春丽[2] 

机构地区：[1]哈尔滨工程大学信息与通信工程学院,哈尔滨150001 [2]中国移动通信集团黑龙江有限公司,哈尔滨150001

出　　处：《深圳大学学报（理工版）》2010年第3期301-305,共5页Journal of Shenzhen University(Science and Engineering)

基　　金：'十一.五'国防预研基金资助项目(4010607010102);中央高校基本科研业务专项基金资助项目(HEVCF100814)~~

摘　　要：基于连续相位编码(continuous phase encoder,CPE)的记忆与递归特性,结合LDPC码及随机交织器,构建LDPCC-CPM系统模型.针对传统接收机中解调器与译码器之间缺少信息共享的弊端,引入Turbo迭代检测机制,提出一种基于软输入软输出(soft-input soft-output,SISO)算法的迭代检测方法,探讨主要参数对系统性能的影响,为实际应用中系统参数的选择提供依据.加性高斯白噪声(additive white Gaussian noise,AWGN)信道下的仿真结果表明,在低信噪比条件下,与传统串行接收机相比,所设计的迭代接收机能有效改善系统的收敛性,降低地板效应出现的概率,提高系统检测误比特率的性能.A model of LDPCC-CPM system based on the memorial and recursive properties of the continuous phase encoder （CPE） was presented. This model is integrated with low-density parity-check code （LDPCC） and interleaver. The Turbo iterative detection mechanism based on soft-input soft output （SISO） algorithm was to improve the information exchange between demodulator and decoder in the traditional receiver. The effects of major parameters on LDPCC-CPM system and the design reference of parameter selection were discussed in detail. The simulation results have demonstrated that the proposed receiver can effectively improve the convergence of the system and reduce the probability of error-floor over an additive white Gaussian noise （AWGN） channel with low signal-to-noise ratio. Therefore, the BER performance of the system is advantageous over the traditional receiver.

关 键 词：通信技术 低密度奇偶校验码 连续相位调制 TURBO原理 迭代检测 软输入软输出算法 

分 类 号：TN911.22[电子电信—通信与信息系统]