Real-Time Spectrum Analyzer Based on All Phase FFT Spectrum Analysis

Author

Wentao Lv ; Chen Shen ; Fan Gui ; Zhongshan Tian ; Daozhuo Jiang

Author_Institution

Zhejiang Univ., Hangzhou, China

fYear

2013

fDate

29-30 June 2013

Firstpage

966

Lastpage

969

Abstract

The estimated accuracy of phase and frequency of all phase FFT spectrum analysis and its correction techniques are high[1-3], for its perfect characteristic of inhibiting the spectrum leakage. The phase isn´t influenced by frequency shift, so there is no need to correct it. In this paper, a spectrum analyzer with self-adaptive sampling frequency is designed on the basis of all phase FFT spectrum analysis techniques, using TI´s 32-bit floating-point DSP. It is shown that the frequency measurement error of the design with high frequency-resolution is 0.01%. It is suited for high-precision, intensive spectrum analysis and non-synchronous sampling harmonic analysis.

Keywords

digital signal processing chips; fast Fourier transforms; floating point arithmetic; frequency measurement; harmonic analysis; measurement errors; real-time systems; signal sampling; spectral analysers; spectral analysis; all phase FFT spectrum analysis; correction techniques; digital signal processor; fast Fourier transform; floating-point DSP; frequency measurement error; high-precision intensive spectrum analysis; nonsynchronous sampling harmonic analysis; real-time spectrum analyzer; self-adaptive sampling frequency; spectrum leakage inhibition; word length 32 bit; Automation; Manufacturing; FFT; all phase FFT; apFFT; spectrum analysis; spectrum analyzer;

fLanguage

English

Publisher

ieee

Conference_Titel

Digital Manufacturing and Automation (ICDMA), 2013 Fourth International Conference on

Conference_Location

Qingdao

Type

conf

DOI

10.1109/ICDMA.2013.226

Filename

6598150