离散频谱的全相位校正法

为了能够对离散频谱进行良好的分析,得到其频率、幅值和相位对理论值的更准确逼近,在现有的离散频谱校正方法基础上,利用全相位频谱分析方法良好的频谱分析特性,提出一种新的频谱校正方法--全相位校正法.该算法简单,通用性好,运算速度快.仿真研究表明,对单频率成分、间隔较远的多频率成分以及密集频谱均可达到很好的校正效果,并可实现对相位的无失真校正,适合于对相位要求较高的实际场合.并与传统的能量重心校正法进行了比较.结果表明,对间隔较远的离散频谱的校正,传统的能量重心法好于全相位法;而对密集频谱的校正,全相位法则要好于能量重心法.

All Phase Correction Method for Discrete Spectrum

To analyze the discrete spectrum and obtain a more correct value about the frequency, the amplitude and the phase, a new correction method for the discrete spectrum-all phase correction is introduced. The method has the frequency analysis ability of the all phase spectrum analyses based on the traditional correction methods. The method has advantages of the simple algorithm and the fast speed. Simulation calculation demonstrates that it can correct the frequency for the single or the multi-frequency components in the discrete spectrum. Because it can correct the input phases without the distortion, the method is suitable for high requirements of the phase. Compared with the energy centrobaric correction method, the proposed method is not well for the signal of large frequency intervals and is well for the signal of smaller frequency intervals.