| 基于循环谱理论的弱信号检测及特征参数估计 |
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| 引用本文： | 刘伟,杜娟. 基于循环谱理论的弱信号检测及特征参数估计[J]. 通信技术, 2010, 43(4): 28-30 |
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| 作者姓名： | 刘伟 杜娟 |
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| 作者单位： | 中国人民解放军通信指挥学院,湖北,武汉,430010 |
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| 摘 要： | 研究了循环平稳信号的基本特性,通过分析通信系统中典型信号的循环平稳特性,得到了循环平稳的特征参数循环频率和信号特征参数的关系。在此基础上研究了该理论在通信领域的具体应用,提出了应用谱相关理论完成弱信号检测及信号特征参数（信号载频、码元速率）的估计方案,仿真实验结果表明,在-17dB的条件下能够进行信号的无误检测,可在-10dB条件下进行特征参数的无误估计。
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| 关 键 词： | 循环自相关函数 循环谱密度 弱信号检测 参数估计 |
Weak Signal Detection and Parameter Estimation Based on Cyclic Spectral Theory |
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| LIU Wei,DU Juan. Weak Signal Detection and Parameter Estimation Based on Cyclic Spectral Theory[J]. Communications Technology, 2010, 43(4): 28-30 |
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| Authors: | LIU Wei DU Juan |
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| Affiliation: | LIU Wei,DU Juan (PLA Comm,ing Communications Academy,Wuhan Hubei 430010,China,Chongqing Communication College,Chongqing 400035) |
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| Abstract: | The basic properties of cyclostationary signal are studied.The relationship of the characteristic parameter and the cyclic frequency is achieved by analyzing the signal in communication system.The scheme for weak signal detection and characteristic parameter estimation is proposed for the communication application.The simulation results show that the signal could be correctly detected at the SNR-17 dB,and the characteristic parameter of signal estimated at SNR -10 dB. |
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| Keywords: | cyclic autocorrelation function cyclic spectral density function weak signal detection parameter estimation |
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