| 一种基于分数低阶协方差矩阵的波束形成新方法 |
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| 引用本文： | 查代奉,邱天爽. 一种基于分数低阶协方差矩阵的波束形成新方法[J]. 通信学报, 2005, 26(7): 16-20 |
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| 作者姓名： | 查代奉 邱天爽 |
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| 作者单位： | 大连理工大学,电子与信息工程学院,辽宁,大连,116024 |
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| 基金项目： | 国家自然科学基金资助项目（60372081,60172072,30170259）;辽宁省科学技术基金资助项目（2001101057） |
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| 摘 要： | 利用稳定分布对具有脉冲特性的噪声进行建模，提出了一种新的分数低阶协方差概念，推导了一种基于分数低阶协方差矩阵的波束形成方法，并分析了其旁瓣特性。模拟表明新方法具有更高的信号干扰噪声比及更强的波束形成与旁瓣抑制能力。新算法在高斯和分数低阶稳定分布环境下比传统的算法具有更好的韧性。
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| 关 键 词： | 信号处理 分数低阶矩 分数低阶协方差 波束形成 α-稳定分布 |
| 文章编号： | 1000-436X（2005）07-0016-05 |
| 收稿时间： | 2004-01-14 |
| 修稿时间： | 2004-01-14 |
New beamforming method based on fractional lower order covariance matrix |
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| ZHA Dai-feng,QIU Tian-shuang. New beamforming method based on fractional lower order covariance matrix[J]. Journal on Communications, 2005, 26(7): 16-20 |
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| Authors: | ZHA Dai-feng QIU Tian-shuang |
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| Abstract: | Conventional array signal processing methods based on Gaussian noise assumption and second order statistics degraded under impulsive noises conditions. After introducing the statistical characteristics of stable distribution briefly, a new beamforming method based on the fractional lower order covariance matrix under alpha-stable noises conditions was proposed. The simulation results showed that the proposed method exhibited better signal to interference plus noise rate and beamforming performances. The method is more robust under both Gaussian and fractional lower order stable distribution environments than conventional method. |
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