| 实正弦信号频率估计的高精度综合算法 |
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| 引用本文： | 耿志辉,王玉林.实正弦信号频率估计的高精度综合算法[J].无线电工程,2008,38(3):28-30. |
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| 作者姓名： | 耿志辉 王玉林 |
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| 作者单位： | 1. 中国人民解放军63891部队,河南,洛阳,471003
2. 中国电子科技集团公司第五十四研究所,河北,石家庄,050081 |
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| 摘 要： | 推导了单频信号离散傅里叶变换的的理论表达式,阐述了FFT法测频的基本原理,并详细介绍了2种插值算法:FFT实部法和分段FFT算法。2种算法都是基于FFT谱线的插值算法,属于改进算法,但是2种算法具有测频性能恶化的潜在缺陷,因此综合考虑2种算法的优缺点,提出一种综合二者优势的综合测频算法。计算机仿真表明综合测频算法性能要优于FFT实部法和分段FFT算法,是一种稳定的高精度测频算法。
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| 关 键 词： | 实部法测频 分段FFT法测频 综合算法 FFT谱线 |
| 文章编号： | 1003-3106(2008)03-0028-03 |
| 修稿时间： | 2007年10月11 |
A High-accuracy Integrated Frequency Estimator for Real Sine Signal |
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| GENG Zhi-hui,WANG Yu-lin.A High-accuracy Integrated Frequency Estimator for Real Sine Signal[J].Radio Engineering of China,2008,38(3):28-30. |
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| Authors: | GENG Zhi-hui WANG Yu-lin |
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| Abstract: | In this paper,we firstly deduce the theoretical discrete Fourier tran sform expression of single frequency signal,and then discuss in detail the prin ciple of FFT frequency estimator and other two interpolation estimator FFT real part and FFT subsection.Both algorithms improve the performance of FFT estimato r based on the interpolation of spectrum line.Considering disadvantages of two methods,we put forward an integrated frequency estimator which combines advanta ges of two algorithms.The computer simulation shows that the integrated frequen cy estimator is better than the original algorithms in stabilization and accurac y. |
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| Keywords: | FFT real part algorithm FFT subsection frequency estimator integra ted method FFT spectrum line |
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