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中文摘要：
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。
英文摘要：
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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