基于数据辅助的CPM信号调制参数估计  

On the Data-Aided Estimation of Modulation Parameters of CPM

作　　者：石明军[1] 邓名桂[1] 周世东[1] 雷俊[1] 姚彦[1] 

机构地区：[1]清华大学电子工程系,北京100084

出　　处：《电子与信息学报》2010年第5期1146-1151,共6页Journal of Electronics & Information Technology

基　　金：国家863计划项目(2007AA01Z2b6);国家973规划项目(2007CB310608);新世纪优秀人才支持计划资助课题

摘　　要：针对非合作条件下实现CPM信号相干解调,首先要准确估计CPM信号调制参数这一关键问题,该文提出了一种基于数据辅助的CPM信号调制指数与成型脉冲联合估计的新方法,使用符号间的相位差分消除CPM信号相位的记忆特性,采用最小二乘法获得调制指数和成型脉冲的联合估计。理论分析与数值仿真表明该方法是无偏的,当数据观测长度为N时,其估计误差以1/N的速率收敛到0。算法适用于全响应和部分响应CPM信号,具有良好的抗噪声性能。In non-cooperative communication scenarios, coherent demodulation of Continuous Phase Modulation （CPM） signals requires precise estimation of CPM modulation parameters. A new data-aided modulation index and shaping pulse joint estimation algorithm is proposed for CPM signals. The differential phase between symbols is used to eliminate signal phase memories, and Least-Square method is used for parameters estimations. Theoretical analysis and numerical simulations show that it is unbiased. The estimating error is converged to zero at 1/N where N is the length of observation data. The algorithm is applicable to both full and partial response CPM modulations and presents good anti-noise performance.

关 键 词：连续相位调制(CPM) 参数估计 调制指数 成型脉冲 

分 类 号：TN911.23[电子电信—通信与信息系统]