| 引用本文: | 孙晓昶,张忠华,龚享铱,等.基于虚拟时间延迟线阵列的联合频率—到达角二维谱估计.[J].国防科技大学学报,2003,25(5):40-43.[点击复制] |
| SUN Xiaochang,ZHANG Zhonghua,GONG Xiangyi,et al.Joint Frequency-DOA Estimation Exploiting Virtual Tapped-delay-line Array[J].Journal of National University of Defense Technology,2003,25(5):40-43[点击复制] |
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| 基于虚拟时间延迟线阵列的联合频率—到达角二维谱估计 |
| 孙晓昶1, 张忠华2, 龚享铱1, 皇甫堪1 |
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(1.国防科技大学 电子科学与工程学院，湖南 长沙 410073;2.中国卫星海上测控中心，江苏 江阴 214431)
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| 摘要: |
| 提出基于虚拟时间延时线阵列的联合频率—到达角二维谱估计方法，把经典的子空间方法推广到空时二维域并进行了改进。基本思路是估计空时噪声子空间和空时信号子空间，然后，利用两个空时子空间特征进行频率—到达角联合二维搜索。正常情况下可分辨的信源数远远超出阵元数目；在信号源宽带较大或信号源波长偏离阵列尺寸较远时，不会像经典方法一样出现大的偏差或估计信源角度范围受限；同时给出信号源的频率和到达角估计，更全面地反映了信号特征。 |
| 关键词: 阵列信号处理 MUSIC方法 到达角估计 频率估计 空时处理 |
| DOI： |
| 投稿日期：2003-06-12 |
| 基金项目: |
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| Joint Frequency-DOA Estimation Exploiting Virtual Tapped-delay-line Array |
| SUN Xiaochang1, ZHANG Zhonghua2, GONG Xiangyi1, HUANGFU Kan1 |
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(1.College of Electronic Science and Engineering, National Univ. of Defense Technology, Changsha 410073, China;2.SMTC, Jiangyin 214431,China)
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| Abstract: |
| A kind of joint frequency-DOA spectrum estimation using virtual tapped-delay-line array is proposed, which generalizes the classical subspace algorithm to two-dimensional space-time domain. The proposed method has three advantages: firstly, increasing the freedom degrees of the corresponding array leading to an enhanced ability to identify much more emitters; secondly, almost free from estimation bias due to the divergence of signal wavelength from what the array size expresses; thirdly, estimating not only the DOAs but also the frequency domain characters of emitters. The obtained characteristic of emitters is more integral. |
| Keywords: array signal processing music algorithm DOA estimation frequency estimation space-time processing |
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