基于相位差的频谱校正方法的研究

研究了基于相位差的频谱校正方法的基本原理,提出一种利用相位差校正的新方法———窗中心平移法。仿真结果表明,该方法实现方便,精度较高,适用于各种对称窗函数。在此基础上,将窗中心平移法与时域平移和改变窗长法综合应用,推导出相位差校正的统一公式。

Study on the Spectrum Correcting Method Based on Phase Difference

The principle of spectrum correction based on difference is studied. A novel method by use of phase phase difference, namely the method of translation of window center is proposed. The results of simulation indicate that the method is casy to be carried out with high precision and is suited for all kinds of symmetrical window function. On the basis of this method, and taking advantages of the methods-time-domain translation as well as the window length change, the uniform formula for the phase difference correction is derived.