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非数据辅助的多指数连续相位调制信号的载波频率估计算法

Chun YANG,Sheng ZHONG,Tao XIE,Shun-qin XIE,Jian ZHANG,Zhi-peng QIE

Journal of Jilin University(Engineering and Technology Edition)（2015）

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Abstract
针对多指数连续相位调制(Multi-h CPM)信号的载波频率估计困难且算法复杂的问题,将仅仅适用于单指数CPM信号的载波频率估计算法进行改进,提出了一种适用于Multi-h CPM信号的非数据辅助的载波频率估计算法.基于最大似然准则获得Multi-h CPM信号载波频率的估计,为了有效地界定文中算法性能,最后推导了Multi-h CPM信号的载波频率估计算法的修正Cramer-Rao限.仿真结果表明:该算法适用于全响应和部分响应的Multi-hCPM信号,其载波频率估计的性能良好且对符号定时偏差和调制指数同步偏差不敏感.
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