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- W1993246899 abstract "Zooming into a spectrum obtained from the Fast Fourier Transform (FFT) could not be performed directly by linear/cubic interpolations in the frequency domain. A spectrum magnifier is presented in this paper as a two-step procedure: the carrier-wave demodulation and the fractional Fast Fourier Transform <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>1</sup> (frFFT). Particularly for a narrow-band signal within Nyquist limits, the carrier-wave demodulation shifts the band center to zero; afterward the frFFT efficiently investigates into precision details of the near-zero band without any resolution cost either in the time domain or in the frequency domain. Such a cost is frequently compromised from accuracy and efficiency demands in the methods based on traditional techniques of zero-padding, low- or band-pass filtering, sub-sampling, etc." @default.
- W1993246899 created "2016-06-24" @default.
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- W1993246899 date "2013-07-01" @default.
- W1993246899 modified "2023-09-26" @default.
- W1993246899 title "Spectrum magnifier: Zooming into local details in the frequency domain" @default.
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- W1993246899 doi "https://doi.org/10.1109/chinasip.2013.6625302" @default.
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