LIDFT method with classic data windows and zero padding in multifrequency signal analysis

This paper presents an advanced discrete Fourier transform linear interpolation method (LIDFT) using classic data windows and a zero padding technique that is well understood from its common use in spectrum analysis with FFT. This advancement of the LIDFT method allows for substantial improvement of its accuracy without deteriorating the condition of the initial location for sinusoidal components in the spectrum, as required in the traditional LIDFT method. Application of classic data windows instead of parametric data window specifically dedicated to the LIDFT method provides numerous opportunities for using this method in multifrequency signal analysis.