| 摘要 |
The method involves subjecting a digitally scanned pseudo heterodyne signal of a discrete Fourier transform. One of amplitude and phase of Fourier coefficient is determined to obtain the Fourier coefficient of the discrete Fourier transform. Predefined tan functions are applied based on a result of the Fourier coefficient. An algorithm is used for quick Fourier transform to create the discrete Fourier transform. The pseudo heterodyne signal is generated by oscillations of a carrier signal. The pseudo heterodyne signal is sampled with multiple frequency of the carrier signal. |
