| 基于四阶累积过的阵列扩展 |
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| 引用本文： | 魏平,肖先赐.基于四阶累积过的阵列扩展[J].电子与信息学报,1997,19(6):745-750. |
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| 作者姓名： | 魏平 肖先赐 |
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| 作者单位： | 电子科技大学电子工程学院，电子科技大学电子工程学院 成都 610054，成都 610054 |
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| 摘 要： | 在阵列测向问题中应用高阶累积量除了信息利用更充分和抑制高斯噪声等优点之外还具有阵列扩展的功能.本文推导了基于四阶累积量的阵列扩展方法,研究了虚拟阵的结构.放宽了协方差方法对信源数目的限制.但该方法在窄带多信号方向估计应用中存在局限.本文还推导了四阶相干问题和阵列扩展的限制条件.最后给出了实验举例.
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| 关 键 词： | 阵列 信号处理 测向 高阶累积量 |
| 收稿时间： | 1996-3-25 |
| 修稿时间： | 1997-1-21 |
FOURTH-ORDER CUMULANT BASED ARRAY EXTENSION IN DIRECTION-FINDING |
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| Wei Ping,Xiao Xianci.FOURTH-ORDER CUMULANT BASED ARRAY EXTENSION IN DIRECTION-FINDING[J].Journal of Electronics & Information Technology,1997,19(6):745-750. |
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| Authors: | Wei Ping Xiao Xianci |
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| Affiliation: | University of Electronic Science and Technology of China Chengdu 610054 |
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| Abstract: | In the array processing problem, the high-order cumulants not only are capable to reduce the Gaussian noises but also have the aperture extension property. The method of the aperture extension using the fourth-order cumulants are studied and the structure of the corresponding virtual array are presented in this paper. The fourth-order coherent problem in the application in the narrow-band direction-finding system is given and analyzed. The array aperture extension condition of the fourth-order cumulant-based method for the multiple sources case is obtained. The numerical results support the analytic results. |
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| Keywords: | Array Signal processing Direction-finding High-order cumulants |
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