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引用本文：

张昌菊,唐斌.单频信号快速频率估计算法比较及改进[J].电讯技术，2005，45（1）：72 - 76. [点击复制]
.Comparison and Modification of Frequency Estimation Algorithms for Single Sinusoid Signal[J].，2005，45（1）：72 - 76. [点击复制]

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单频信号快速频率估计算法比较及改进

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摘要:

本文首先讨论并分析了各种插值DFT(离散傅里叶变换)算法,然后提出了一种实正弦信号的快速插值频率估计方法。该方法只需 3个DFT变换系数的实部构造频率修正项,计算量低,具有精度高、测频速率快的特点。计算机模拟和FPGA仿真均证实了该方法的有效性。

关键词: 宽带数字接收机频率估计快速测频插值离散傅里叶变换谱峰搜索

DOI：10.3969/j.issn.1001-893X.

基金项目:信息产业部电子科学院军事电子预研项目

Comparison and Modification of Frequency Estimation Algorithms for Single Sinusoid Signal

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Abstract:

Some interpolated Discrete Fourier Transform (DFT) methods are analyzed. And then, a new method, which estimates frequency with high precision and fast rate compared with the mentioned methods for the real single tone based on DFT, is presented. The method only needs three real-parts of DFT coefficients.Both computer simulation and FPGA implementation confirm its effectiveness.

Key words: Wideband digital receiver,Frequency estimation,Fast frequency measurement,Interpolated DFT,Spectrum peak search