| 采用分数低阶循环谱相干系数的调制识别 |
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| 引用本文： | 赵春晖,杨伟超,杜宇.采用分数低阶循环谱相干系数的调制识别[J].应用科学学报,2011,29(6). |
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| 作者姓名： | 赵春晖 杨伟超 杜宇 |
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| 作者单位： | 哈尔滨工程大学信息与通信工程学院,哈尔滨,150001 |
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| 基金项目： | 国家自然科学基金，高等学校博士学科点专项科研基金，哈尔滨市优秀学科带头人基金 |
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| 摘 要： | Alpha稳定分布噪声导致二阶循环谱相干系数失效,使相应的通信信号调制识别算法退化.针对这个问题,提出了基于分数低阶循环谱相干系数的识别算法.文中给出了分数低阶循环谱相干系数的相关理论,分析了通信信号的分数低阶循环谱相干系数,在此基础上提取谱相干系数循环频率域特征作为识别特征参数.用BP神经网络为分类器,实现了通信信号调制方法识别.仿真结果表明,在Alpha稳定分布噪声下,该识别算法性能优于基于二阶循环谱相干系数的方法.在高斯噪声条件下,两种识别算法性能相当.
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| 关 键 词： | 调制识别 Alpha稳定分布噪声 分数低阶循环谱 谱相干系数 |
Modulation Recognition Using Fractional Low-Order Cyclic Spectrum Coherence Coefficient |
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| ZHAO Chun-hui,YANG Wei-chao,DU Yu.Modulation Recognition Using Fractional Low-Order Cyclic Spectrum Coherence Coefficient[J].Journal of Applied Sciences,2011,29(6). |
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| Authors: | ZHAO Chun-hui YANG Wei-chao DU Yu |
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| Institution: | ZHAO Chun-hui,YANG Wei-chao,DU Yu College of Information and Communication Engineering,Harbin Engineering University,Harbin 150001,China |
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| Abstract: | Noise with alpha stable distribution leads to loss of efficacy of the second-order cyclic spectrum coherence coefficient,and degrades related algorithms for communication signal modulation recognition.A recognition algorithm based on fractional low-order cyclic spectrum coherence coefficient is proposed to solve this problem.The related theory of fractional low-order cyclic spectrum coherence coefficient is first introduced. Fractional low-order cyclic spectrum coherence coefficients of communication signal... |
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| Keywords: | modulation recognition alpha stable distribution noise fractional low-order cyclic spectrum spectrum coherence coefficient |
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