Six-interpolation FFT (Fast Fourier Transform) algorithm based on four-item Nuttall cosine window
A technology of cosine window and algorithm, which is applied in the field of six-interpolation FFT algorithm, can solve the problems of incomplete utilization of peak frequency point and insufficient detection accuracy, so as to reduce the risk of harmonic detection error, balance accuracy and calculation amount, and improve accuracy Effect
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[0044] In order to enable those skilled in the art to better understand the technical solutions in the application, the technical solutions in the embodiments of the application will be clearly and completely described below in conjunction with the drawings in the embodiments of the application; obviously, the described implementation Examples are only some of the embodiments of the present application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.
[0045] A six-interpolation FFT algorithm based on the four-term Nuttall cosine window provided in the embodiment of the present application comprises the following steps:
[0046] The harmonic signal is sampled at f c Perform uniform sampling to obtain the discrete-time signal x(n), add four Nuttall cosine windows to the discrete-time signal x(n) to trunca...
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