| 滤波器组在相干激光测风雷达信号处理中的应用 |
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| 引用本文： | 曹文勇,马明,赵彬,何幸锴,侯天晋,周鼎富,邓华荣.滤波器组在相干激光测风雷达信号处理中的应用[J].红外与激光工程,2013,42(5):1179-1183. |
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| 作者姓名： | 曹文勇 马明 赵彬 何幸锴 侯天晋 周鼎富 邓华荣 |
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| 作者单位： | 1.西南技术物理研究所,四川 成都 610041; |
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| 基金项目： | 国家自然科学基金(40905011) |
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| 摘 要： | 首先简要介绍了相干激光测风雷达和数字滤波器组的工作原理，然后重点分析了余弦调制滤波器组。余弦调制滤波器组具有实现简单、占用资源少等特点。信号通过滤波器组后可分解成若干个窄带子信号，目标的多普勒频率将落入其中一个子带信号中，针对这一子信号进行处理可获得较高的信噪比。利用Matlab设计出了8通道余弦调制滤波器组，然后对回波信号进行处理，从仿真结果和实测信号处理结果可以看出:该方法可以判断并抽取出多普勒频率所在的子带信号。
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| 关 键 词： | 滤波器组 激光雷达 信号处理 相干探测 |
| 收稿时间： | 2012-09-10 |
Application of filter bank on signal processing of coherent wind lidar |
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| Cao Wenyong,Ma Ming,Zhao Bin,He Xingkai,Hou Tianjin,Zhou Dingfu,Deng Huarong.Application of filter bank on signal processing of coherent wind lidar[J].Infrared and Laser Engineering,2013,42(5):1179-1183. |
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| Authors: | Cao Wenyong Ma Ming Zhao Bin He Xingkai Hou Tianjin Zhou Dingfu Deng Huarong |
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| Affiliation: | 1.Southwest Institute of Technical Physics,Chengdu 610041,China;2.Institute of Atmospheric Environment,General Staff Department,Beijing 100029,China |
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| Abstract: | The principle of coherent wind lidar and digital filter banks were introduced briefly at first, and then the theory of cosine modulated filter banks was analyzed. Cosine modulated filter banks have excellent characteristics such as simple realization and less resources occupying. Signal can be decomposed into several narrow sub-band by using cosine modulated filter banks. The Doppler frequency of the target will fall into one of sub-band and the higher SNR can be obtained by processing each sub-band. Based on this method, a 8-channel cosine modulated filter banks were designed with Matlab, which was used in coherent wind lidar signal processing simulations. The results of the simulation and measured signal prove the correctness of the method. |
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