| 基于空间-频率的DOA估计研究 |
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| 引用本文： | 李霞,李志舜.基于空间-频率的DOA估计研究[J].电子与信息学报,2004,26(8):1232-1236. |
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| 作者姓名： | 李霞 李志舜 |
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| 作者单位： | 西北工业大学航海学院,西安,710072;西北工业大学航海学院,西安,710072 |
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| 摘 要： | 在阵列信号处理中，提取回波信号中的空间频率，可以得到目标的方位信息。该文正是利用小 波变换的时间-频率特性，对回波信号进行时间-空间处理，从而对目标方位进行了估计。文中给出了计算机仿真结果，并与基于短时傅里叶变换的估计结果进行了比较。
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| 关 键 词： | 连续小波变换 时频分析 空间-频率分布 |
| 文章编号： | 1009-5896(2004)08-1232-05 |
| 收稿时间： | 2002-7-22 |
| 修稿时间： | 2002年7月22日 |
Estimation of DOA Based on Spatial-Frequency Distribution |
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| Li Xia,Li Zhi-shun.Estimation of DOA Based on Spatial-Frequency Distribution[J].Journal of Electronics & Information Technology,2004,26(8):1232-1236. |
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| Authors: | Li Xia Li Zhi-shun |
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| Abstract: | In processing of array signal, Direction Of Arrival(DOA) of target can be obtained by extracting spatial frequency of echo. This article mainly proposes a new method of beam-forming using continuous wavelet transform. It is based on the traditional beam-forming method with STFT. In the paper, the theory frames and the simulation results are given. From the results it can be concluded that the method based on WT is more effective than that on STFT. This effect is determined by the advantages of wavelet transform in time-frequency analysis. |
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| Keywords: | Continuous wavelet transform Time-frequency analysis Spatial-frequency distribution |
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