| 数字信号处理中加窗优化处理的研究 |
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| 引用本文： | 刘 波 彭骁寒. 数字信号处理中加窗优化处理的研究[J]. 计算机与数字工程, 2014, 0(3): 471-474 |
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| 作者姓名： | 刘 波 彭骁寒 |
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| 作者单位： | [1]华中科技大学自动化学院,武汉430074 [2]武汉邮电科学研究院,武汉430074 |
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| 摘 要： | 论文阐述了模拟信号到数字信号的处理过程中,信号采样频率与加窗处理对信噪比与分辨率的影响.举例包含高斯白噪声的频率成分单一的无限衰减震荡信号进行数字采样分析时的分辨率与信噪比之间的矛盾.提出采用截断信噪比恶化部分的样点信号,然后将截断部分补零样点的办法,在不影响信号分辨率的情况下,提高信噪比.通过对该方法进行实际信号处理,收到良好的效果.
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| 关 键 词： | 数字信号 窗函数 采样 频谱分辨率 信噪比 快速傅里叶变换 |
Optimization Process of Window-adding in the Digital Signal Processing |
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| LIU Bo,＇,PENG Xiaohan. Optimization Process of Window-adding in the Digital Signal Processing[J]. Computer and Digital Engineering, 2014, 0(3): 471-474 |
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| Authors: | LIU Bo ＇ PENG Xiaohan |
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| Affiliation: | 2 School of Automation, Huazhong University of Science and Technology, Wuhan 430074) (2. Wuhan Research Institute of Posts and Telecommunications, Wuhan 430074) |
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| Abstract: | An example of sampling and analyzing an infinitely decayed single-frequency signal which contains the Gauss- Jan White Noise is given. The contradiction between SNR and resolution is found. A method of cutting oil the sample points of the deteriorative parts is presented and the cut part is filled with zero points. It improves the SNR without affecting the signal resolution. By using this method in the actual signal processing, good results are achieved. |
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| Keywords: | digital signal window function sampling spectral resolution SNR FFT |
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