| 基于高阶累积量的多音并行调制信号检测研究 |
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| 引用本文： | 谢奇,崔琛.基于高阶累积量的多音并行调制信号检测研究[J].计算机仿真,2008,25(9). |
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| 作者姓名： | 谢奇 崔琛 |
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| 作者单位： | 合肥电子工程学院,安徽合肥,230037 |
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| 摘 要： | 针对多音并行信号的调制识别问题,提出了一种基于四阶累积量的识别方法,用以识别特定通信协议下子载波调制样式为MPSK的多载波调制信号.该方法利用带通MPSK信号的累计量特征,在不考虑相位影响的情况下提出了该多音并行信号近似模型并通过理论计算和仿真验证此模型的正确性.然后利用此模型通过计算仿真找到子载波数与累计量参数的对应关系.根据这种对应关系提出识别算法并进行识别仿真,仿真结果表明在低信噪比(-5dB)下有很好的识别效果.
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| 关 键 词： | 多音并行调制 四阶累积量 子载波个数 识别 |
Detection of Multicarrier Modulation Based on Higher-Order Cumulants |
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| XIE Qi,CUI Chen.Detection of Multicarrier Modulation Based on Higher-Order Cumulants[J].Computer Simulation,2008,25(9). |
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| Authors: | XIE Qi CUI Chen |
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| Affiliation: | XIE Qi,CUI Chen(Hefei Electronic Engineering Institute,Hefei Anhui 230037,China) |
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| Abstract: | To identify modulation of multicarrier modulation(MCM) according to specifical communication protocols whose sub-carrier modualtion is MPSK,a method based on 4th-order cumulants is proposed.Without considering the influence of the phase,this method proposes a model of MCM using character of band-pass MPSK and proves its correctness through deduction and simulation.Then the relationship between number of subcarriers and cumulants is discovered through calculation and simulation.On the basis of the relationsh... |
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| Keywords: | Multicarrier modulation 4th-order cumulants Number of subcarrier Identification |
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