Performance analysis of short-time fourier transform algorithm with selected optimization methods

Rybak, Grzegorz; Chaniecki, Zbigniew; Grudzień, Krzysztof; Romanowski, Andrzej; Sankowski, Dominik

doi:10.1109/iiphdw.2018.8388393

Cited by 2 publications

(2 citation statements)

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“…Various methods can be used to design such a time-frequency representation, the simplest approach being to divide the signal into short time segments and determine the spectrum of each segment by Fourier transform. The result of this process is the commonly used short-time fourier transform (STFT) [16][17][18]. By analyzing the frequency content of the signal as the time window moves, a time-frequency distribution called spectrogram (square of the size of the STFT) is generated.…”

Section: Introductionmentioning

confidence: 99%

“…It has the advantage of being positive, easy to interpret, but also has the disadvantage of being irreversible. This means that once the spectrogram of a signal is calculated, the original signal cannot be obtained from the spectrogram again [18]. The theory of WV, which will be briefly discussed in the following sections of the study, gives very satisfactory results in this sense.…”

Section: Introductionmentioning

confidence: 99%

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Spectral and Statistical Analysis for Damage Detection in Ceramic Materials

Akgun¹

2020

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In this study, the internal or superficial cracks that may occur during the production of ceramic plates were determined using the impact noise method. In the industry, ceramic materials are frequently used in areas such as kitchenware and construction. Many different methods are used in the quality control processes of ceramic materials. In this study, the sound produced by the impact applied to the ceramic material was analyzed. As a result of the analysis, the material was found to be undamaged or damaged. This method is called the Impulse Noise method. In this study, damaged and undamaged ceramic plates with different cracks were selected and impact plates were applied to the plates by impact pendulum. The ceramic plates used in the application have the same characteristics and dimensions produced by the same company of the same type. The noise generated as a result of the impact applied to a determined point on the tested materials was examined by Wigner-Ville method which is one of the time-frequency analysis methods. In addition, bispectrum and trispectrum analyzes, which are high-order spectral analysis (HOSA) methods, were used. Statistically, signal analysis with running minimum and maximum, mean value and peak to RMS examinations were also added. The applied methods give good results in differentiating between undamaged and damaged ceramic plates.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Spectral and Statistical Analysis for Damage Detection in Ceramic Materials

Akgun¹

2020

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Short-Time Fourier Transform Based on Metaprogramming and the Stockham Optimization Method

Rybak

Strzecha

2021

Sensors

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The extension for high-performance STFT (Short-Time Fourier Transform) algorithm written entirely in Java language for non-parallel computations is presented in the current paper. This solution could compete with the best available and most common algorithms supplied by libraries such as FFTW or JTransform. The main idea was to move complex computations and expensive functions to the program generation phase. Thus, only core and essential operations were executed during the runtime phase. Furthermore, new approach allows to eliminate the necessity for a rearrangement operation that uses the bit-reversal permutation technique. This article presents a brief description of the STFT solution that was worked out as an extension for the original application, in order to increase its efficiency. The solution remains a Stockham algorithm adapted using metaprogramming techniques and entails an additional reduction its execution time. Performance tests and experiments were conducted using a Java Platform and JMH library, which allowed for accurate execution time measurements. Major aspects of the Java VM like warm-up effects were also taken into consideration. Solution was applied into Electrical Capacitance Tomography measurement system in order to measure the material changes during the silo discharging industrial process.

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Performance analysis of short-time fourier transform algorithm with selected optimization methods

Cited by 2 publications

References 12 publications

Spectral and Statistical Analysis for Damage Detection in Ceramic Materials

Spectral and Statistical Analysis for Damage Detection in Ceramic Materials

Short-Time Fourier Transform Based on Metaprogramming and the Stockham Optimization Method

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