Frequency Calibration Settings of FFT Spectrogram. (October 2019)

• Record Type: Journal Article
• Authors: Gao, Yunqi; Liu, Shuai; Qi, Dehui; Yang, Guang; Cui, Yaning
• Is Part Of: IOP conference series. Volume 612:issue 5(2019)
• Publication Date: 2019-10
• Subjects: Materials science -- Periodicals; 620.1105
• DOI: 10.1088/1757-899X/612/5/052010
• Languages: English
• ISSNs: 1757-8981

Abstract

Abstract: This article mainly elaborated in the field of digital signal processing in, discrete signal do N point FFT transform, the frequency spectrum diagram shaft calibration set problem, researchers usually tend to be equal to frequency axis, but this may lead to frequency before and after the inconsistent problem, this article from the Angle of the sampling frequency and the odd-even N aspects carries on the analysis, get when the N is an even number shall be on the basis of the original minus fs /2, when N is odd, should be on the basis of the original minus the [( N - 1) × f 2 ]/2 N through such method can properly set spectrum frequency scale.