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can someone please explain me the x-axis in the attached figure?

조회 수: 4 (최근 30일)
moin abbasi
moin abbasi 2015년 12월 9일
마감: MATLAB Answer Bot 2021년 8월 20일
About the normalized frequency. I mean what does it represent. Please guide me in detail

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Star Strider
Star Strider 2015년 12월 9일
In discrete (uniformly-sampled) signals, the highest usable frequency is the Nyquist frequency, defined as half the sampling frequency. All frequencies in the Fourier transform of a sampled signal are therefore ‘normalised’ from zero to the Nyquist frequency, expressed in ‘pi radians/sample’. You can get the x-axis of your figure in Hz if you multiply it by the Nyquist frequency.

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