摘要
根据连续相位调制(CPM)的分解模型,CPM可分解为连续相位编码(CPE)和无记忆调制(MM)的组合,基于CPE的记忆与递归特性,结合外部的Turbo码及随机交织器,构建串行级联Turbo-CPM系统模型。利用系统中解调器与译码器均可输出软信息的特点,将迭代检测原理引入到该系统中,设计了基于软输入软输出(SISO)算法的迭代检测接收机,并研究了其主要参数对系统性能的影响。理论分析和仿真结果表明:在低信噪比条件下,与传统的解调译码级联式接收机相比,所设计的接收机能够有效改善系统的收敛性,降低地板效应出现的概率,提高系统的误比特率性能。
Based on the decomposed model of Continuous Phase Modulation（CPM） ,CMP is divided into a Continuous Phase Encoder（CPE） and a Memoryless Modulator（MM） .Using the memorial and recursive characters of CPE,combining with external turbo code and random interleaver,the model of turbo-CMP system is established.Making use of the soft information output character of the system＇s demodulator and decoder,an iterative detection receiver based on the SISO algorithm is proposed.The effects of the parameters of the turbo-CMP system on its performance are studied. Theoretical analysis and simulation results show that the proposed receiver can improve the convergence of iteration,and reduce the error-floor and the bit-error-rate effectively than that of traditional concatenated receiver under the condition of low signal-to-noise ratio.
出处
《吉林大学学报（工学版）》
EI
CAS
CSCD
北大核心
2010年第6期1724-1728,共5页
Journal of Jilin University:Engineering and Technology Edition
基金
'十一五'国防预研基金项目(4010607010102)
'中央高校基本科研业务费专项基金项目'(HEUCF100814)
关键词
通信技术
TURBO码
连续相位调制
迭代算法
接收机
communication technology
Turbo code
continuous phase modulation
iterative algorithm
receiver
