Analysis on Weak Signals with Short-Time Fourier Transform Method

Abstract:

To make easy for the operators on the work of analyzing the weak signals, at the same time, for the purpose to improve unskillful operators analyze ability and diagnostic efficiency, at last to get the goal of fast diagnostic. Methods: We recommend STFT theory, then analyzed algorithm to design the programs by the way of LabVIEW2011, at last we realized to change one-dimensional weak signals into the form of intensity maps, which owns obvious recognition feature. Results: We have successfully used programs to realize the analysis on intensity maps, and also simplified judgmental process on illness. This method improves efficiency. Conclusion: Using the method described above can achieve the goal for improving the analysis method, it may work well as we thought before.

• Periodical: Applied Mechanics and Materials (Volumes 556-562)
• Pages: 5003-5005
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.556-562.5003
• Online since: May 2014
• Authors: Qi Da Yu*, Ya Lin Li, Jin Wang
• Keywords: LabVIEW2011, Short Time Fourier Transform, Weak Signals

References

[1] Qingbo Yin, Liran Shen, Mingyu Lu, et al: Selection of optimal window length using STFT for quantitative SNR analysis of LFM signal[J], Journal of Systems Engineering and Electronics, Vol. 24, No. 1, 2013, pp.26-35.

DOI: 10.1109/jsee.2013.00004

[2] He Lamei, Wang Yuhang: The Application of STFT and FIR to Airborne Transient Electromagnetic Data Denoising[J], Chinese Journal of Engineering Geophysics, 2013. 1. 10(1), pp.15-20.

[3] Yuan Wei, Zhou Hongsheng, Liu Chengdong, et al: The comparision of short time Fourier transform and generalized S transform of the dispersion curves[J], Computing Techniques for Geophysical and Geochemical Exploration, 2013. 1, 35(1), pp.54-59.

[4] Jin Zhaodi, Neng Changxin, Wang zhenzhong, et al: Vibration Signal Analysis and Application of Drill Stem Based on STFT[J], Coal Mining Technology, 2011, 2 , pp.29-32.

[5] Li Guohong, Li Feixing: Application of STFT in the Field of Aero-Engine Vibration Signal Processing[J], Measurement & Control Technology, 2013, 32(4), pp.45-49.

[6] Li Wei, Xie hua: Short time Fourier transform applies to frequency shift keying demodulation[J], Electronic Measurement Technology, 2011. 7, 34(7), pp.34-42.

[7] F. Millioz, N. Martin: Circularity of the STFT and spectral kurtosis for time-frequency segmentation in Gaussian environment[J], IEEE Trans. on Signal Processing, 2011, 59(2), pp.515-524.

DOI: 10.1109/tsp.2010.2081986

[8] Shen Leilei, Zhang Huisheng, Li Lixin: Research of anti-jamming algorithm for satellite navigation receiver based on STFT[J], Electronic Design Engineering, 2011. 3, 20(6), pp.93-95.