| 基于FFT与自相关函数的快速功率谱估计方法 |
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| 引用本文： | 李春林,伍勇.基于FFT与自相关函数的快速功率谱估计方法[J].舰船电子工程,2011,31(10):92-95. |
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| 作者姓名： | 李春林 伍勇 |
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| 作者单位： | 1. 92755部队67分队,临高,571820
2. 92098部队电子对抗科,陵水,572425 |
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| 摘 要： | 在信号的功率谱估计中通常采用基于自相关函数的方法。而基于自相关函数的功率谱估计的结构与离散傅立叶变换非常类似,但每次的计算结果所对应的频谱分量是任意的。考虑目前快速Fourier变换算法（FFT）已经发展成熟,且已广泛地运用到了雷达数字信号处理中。因此,文章对频谱分量所对应的参数加以调整和限制,使其与离散傅立叶变换输出完全一致,然后利用FFT算法来计算功率谱,从而实现功率谱的快速估计,最后给出了快速估计的方法步骤与计算实例,论证了该方法的有效性。
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| 关 键 词： | 功率谱估计 快速傅立叶变换 自相关函数 |
Fast Power Spectrum Estimation Method Based on FFT and Autocorrelation Function |
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| Li Chunlin Wu Yong,Lingao ,Lingshui.Fast Power Spectrum Estimation Method Based on FFT and Autocorrelation Function[J].Ship Electronic Engineering,2011,31(10):92-95. |
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| Authors: | Li Chunlin Wu Yong Lingao Lingshui |
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| Institution: | Li Chunlin1) Wu Yong2)(Unit 67,No.92755 Troops of PLA1),Lingao 571820)(No.92098 Troops of PLA2),Lingshui 572425) |
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| Abstract: | During the process of power spectrum estimation,autocorrelation function based method is commonly adopted.The structure of the power spectrum estimation is quite similar to Discrete Fourier Transformation(DFT),however,the DFT results corresponding to its spectra in a random way.Nowadays,since Fast Fourier Transform algorithm is widely used in radar signal processing since its advantage in computation,the parameters of the power spectrum elements are adjusted to the output manner of DFT In this paper.FFT is ... |
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| Keywords: | power spectrum estimation fast fourier transform autocorrelation function |
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