一种改进的 FFT 离散频谱相位差加权校正算法

摘要

The author of this paper proposes an improved FFT weighted correction algorithm for the discrete spectrum phase difference to overcome the shortcoming of inaccuracy of the tradition-al spectrum correction for phase difference.By this algorithm,the spectral correction can be a-chieved through weighting the biggest calibration error and the second biggest calibration error by a certain percentage.The simulation results show that in the case of the maximum spectrum,the frequency resolution of the frequency calibration error is increased by 90 percent with the pro-posed algorithm.%为解决用传统相位差法进行频谱校正精度不高的问题，提出了一种改进的 FFT 离散频谱相位差加权校正算法。该算法是通过将相位差中最大值校正误差与次大值校正误差按一定比例进行加权来获得频谱校正结果。对此的仿真结果表明，该算法与传统相位差法相比，在频谱最大值相同的情况下，频率校正误差的频率分辨率提高了近90%，提高了频率校正精度。