现代雷达2012，Vol.34Issue(11)：41-44,48,5.
基于FFT的快速高精度正弦信号频率估计算法
A Fast and Accurate Algorithm for Frequency Estimation of Sinusoid Signal Based on FFT
唐鹏飞 1林钱强 1袁斌 1陈曾平1
作者信息
- 1. 国防科技大学电子科学与工程学院, 长沙410073
- 折叠
摘要
Abstract
A fast and accurate algorithm based on FFT for frequency estimation of sinusoid signal is proposed in this paper. The performances of Jacobsen algorithm and Fourier-coefficient-interpolation iterative algorithm are investigated in this paper. It shows that Jacobsen algorithm has a less computational load, but poor precision, and the Fourier-coefficient-interpolation iterative algorithm has higher precision, but it needs two iterations. Because for each iteration, FFT coefficients of two frequency points are need to computed, it will result in a great computation burden. By combining the two algorithms, an improved approach is proposed. The improved approach iterates once with the initial value from Jacobsen algorithm and the performance is nearly the same as two iterations of original iterative algorithm. Simulation results indicate that the frequency estimation variance of this approach approaches to CRLB (Cramer-Rao Lower Bound) throughout the frequency band and performs high anti-noise property. The approach is convenient for real-time realization in real applications due to the less calculation load.关键词
频率估计/FFT系数/Jacobsen算法/迭代算法Key words
frequency estimation/FFT coefficient/Jacobsen algorithm/iteration algorithm分类
信息技术与安全科学引用本文复制引用
唐鹏飞,林钱强,袁斌,陈曾平..基于FFT的快速高精度正弦信号频率估计算法[J].现代雷达,2012,34(11):41-44,48,5.
