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Showing 1 to 8 of 8 for “"Wigner-Ville distribution"”.
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Analysis of digital communication signals and extraction of parameters
… methods utilize modified time- frequency distributions, where one of these is based on the Wigner-Ville Distribution (WVD). Gaussian white noise is added to the signal to simulate various signal-to-noise ratios (SNRs)
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Fault detection in rotating machines by vibration signal processing techniques
… demodulation, continuous wavelet transform, Wigner-Ville distribution and spectral correlation density function. The detection and the diagnostic capability of these techniques are discussed and compared on the basis of experimental results concerning gear tooth faults, i.e. fatigue crack at …
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Space/time/frequency methods in adaptive radar
… frequency of a linear FM signal (chirp). The Wigner-Ville distribution, the Gabor expansion, the Short-Time Fourier transform and the Continuous Wavelet Transform are compared with respect to their performance in noisy SAR data to estimate the instantaneous Doppler frequency of range …
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Electrophysiological Recording of the Brain, Visualization, Prediction, and Interconnectivity
… resolution than previously possible. The use of Wigner-Ville distribution together with chirplet decomposition allows a clearer visualization in terms of both the temporal and frequency details with detail higher than previously achieved using other methods including Choi-Williams and …
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Application of Joint Time-Frequency Methods and Artificial Neural Networks for Monitoring Co-Firing Burners
… The collected data was then processed using the Wigner-Ville Distribution (WVD) joint time-frequency method and subsequently classified using a Self-organising Map (SOM). It was found that it was possible to relate the classification of the sensor data to operational parameters such as the burner …
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Phased Array Damage Detection and Damage Classification in Guided Wave Structural Health Monitoring
… algorithms, i.e. short time Fourier transform, Wigner-Ville distribution, wavelet transform, and matching pursuit, are investigated to select an appropriate algorithm for damage classification, and a spectrogram based on short time Fourier transform is adopted for its suitability. A machine …
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Detection of Rotor and Load Faults in BLDC Motors Operating Under Stationary and Non-Stationary Conditions
Brushless Direct Current (BLDC) motors are one of the motor types rapidly gaining popularity. BLDC motors are being increasingly used in critical high performance industries such as appliances, automotive, aerospace, consumer, medical, industrial automation equipment and instrumentation. Fault …
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New contributions on motion estimation through optical flow techniques applied to cardiac magnetic resonance imaging = Nuevas contribuciones en estimación de movimiento mediante técnicas de flujo óptico aplicado a imagen de resonancia magnética cardiaca
… specifically it relies on the computation of the Wigner–Ville distribution (WVD) of the motion sequences and the Hough Transform (HT) of the spatio-temporal-frequential spectrum. The Hough Transform is a well-known line and shape detection method that is highly robust against incomplete data and …