基于FFT并实时修正的Rife频率估计算法  

The Rife frequency estimation algorithm Based on real-time FFT

作　　者：张庆国[1] 

机构地区：[1]中国船舶重工集团公司七五○试验场第六研究室

出　　处：《信号处理》2009年第6期1002-1004,共3页Journal of Signal Processing

基　　金：国防预研项目(No.41901060501)

摘　　要：在插值FFT频率估计算法的基础上,提出一种新的基于FFT并实时修正的Rife频率估计算法。给出理论计算过程及相关误差公式,并在蒙特卡罗模拟仿真实验的基础上利用ADSP-TS201平台对上述频率估计算法进行验证和比较。证明了新算法在计算量增加不大的情况下,在设定频率范围内能够提高信号频率估计精确度,其均方误差接近克拉美-罗限,具有工程实用价值。A new amendment Rife frequency estimation algorithm based on real-time amendment FFT is proposed, which is derived from the interpolation algorithm of FFT frequency estimated algorithm. The theoretical calculation process and related error formula are given out. The frequency estimation algorithms verifying and comparing are carried on the ADSP-TS201 platform after Monte Carlo simulation experiment. It is shown that the accuracy of the frequency estimation has been improved in the setting frequency range with- out increasing the calculation amount obviously by using the new algorithm, and the MSE is close to the Cramer-Rao Lower Bound （CRLB）. So it has some practical value for engineering.

关 键 词：频率估计 离散傅里叶变换 克拉美-罗限 实时修正 

分 类 号：TN911[电子电信—通信与信息系统]