| 一种改进的卫星MPSK通信信号盲载频估计算法 |
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| 引用本文： | 燕 展,康 凯,王红军. 一种改进的卫星MPSK通信信号盲载频估计算法[J]. 电讯技术, 2013, 53(9): 1186-1190 |
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| 作者姓名： | 燕 展 康 凯 王红军 |
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| 作者单位： | 解放军电子工程学院,合肥,230037 |
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| 基金项目： | 国家自然科学基金资助项目（60972161） |
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| 摘 要： | 针对第三方侦察中卫星通信信号的载波频率高精度估计问题,提出了一种没有先验知识条件下的MPSK信号盲载频估计改进算法,推导了MPSK信号四阶循环累积量运算的简化形式,并采用循环重叠Welch功率谱粗载频估计和四阶循环累积量精估计的方法完成MPSK信号的载频估计,大幅降低了运算量。仿真实验证明了所提算法的有效性。
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| 关 键 词： | 卫星通信 MPSK信号 载频估计 盲估计 循环重叠Welch功率谱 高阶循环累积量 |
An improved blind carrier frequency estimation algorithm for satellite MPSK signals |
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| YAN Zhan,KANG Kai and WANG Hong-jun. An improved blind carrier frequency estimation algorithm for satellite MPSK signals[J]. Telecommunication Engineering, 2013, 53(9): 1186-1190 |
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| Authors: | YAN Zhan KANG Kai WANG Hong-jun |
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| Affiliation: | YAN Zhan;KANG Kai;WANG Hong- jun;Electronic Engineering Institute of PLA; |
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| Abstract: | For the problem of carrier frequency high-precision estimation of satellite signal, an improved blind carrier frequency estimation algorithm for satellite MPSK signals is presented in presence of unknown parameters. The simplified format of fourth-order cyclic cummulant is analyzed and used in order to reduce the computational complexity. The circular overlap Welch spectrum is used to perform a coarse estimation and the high-order cyclic cummulant method is used to perform a fine estimation. Simulation results show that the new algorithm can quickly and effectively estimate the signal carrier frequency under low SNR. |
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| Keywords: | satellite communication MPSK signal carrier frequency estimation blind estimation circular overlap Welch spectrum high-order cyclic cummulant |
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