| 激光主动探测中回波信号的小波去噪方法 |
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| 引用本文： | 熊飞,张晔.激光主动探测中回波信号的小波去噪方法[J].光学与光电技术,2007,5(6):72-74. |
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| 作者姓名： | 熊飞 张晔 |
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| 作者单位： | 1. 北京航天飞行控制中心通信总站,北京,100094
2. 武汉军械士官学校,武汉,430075 |
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| 摘 要： | 在分析激光主动探测中回波信号的噪声特性和小波变换去噪原理的基础上，提出了一种基于最大信噪比准则的小渡阈值去噪方法。首先用最大信噪比准则对小波变换系数进行阈值选取，然后采用软阂值方法对小波系数进行量化处理后再重构。仿真结果表明最大信噪比准则小波去噪方法改善信噪比效果十分显著，检测下限达到-16．2dB。证明了该方法在激光主动探测系统回波信号检测中的有效性。
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| 关 键 词： | 激光主动探测 小波变换 最大信噪比准则 软阈值方法 |
| 文章编号： | 1672-3392（2007）06-0072-03 |
| 收稿时间： | 2006-11-20 |
| 修稿时间： | 2007-01-15 |
De-Noising Method Based on Wavelet Transform in Active Laser Detection |
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| XIONG Fei, ZHANG Ye.De-Noising Method Based on Wavelet Transform in Active Laser Detection[J].optics&optoelectronic technology,2007,5(6):72-74. |
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| Authors: | XIONG Fei ZHANG Ye |
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| Abstract: | Based on the analysis of noise characteristics and wavelet transform de-noising principle, a novel wavelet de-noising method based on maximal SNR principle is proposed. Maximal SNR principle is used to select the threshold and then soft-threshold method is used to quantify the wavelet coefficient. The simulation results show that maximal SNR principle method has an important effect on SNR improvement and it can detect signal in 16. 2 dB SNR. The results also show its validity in active laser detection. |
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| Keywords: | active laser detection wavelet transform maximal SNR principle soft-threshold method |
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