A multiwindow time-frequency approach based on the concepts of robust estimate theory

• Published in: 2011 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP) pp. 3584 - 3587
• Main Authors: Orovic, Irena, Zaric, Nikola, Stankovic, Srdjan, Amin, Moeness
• Format: Conference Proceeding
• Language: English
• Published: IEEE 01-05-2011
• Subjects: Estimation; Frequency estimation; Hermite functions; instantaneous frequency estimation; multiwindow approach; Noise; Noise measurement; Robustness; Spectrogram; Time frequency analysis
• ISBN: 9781457705380; 1457705389
• ISSN: 1520-6149; 2379-190X
• DOI: 10.1109/ICASSP.2011.5946253

An approach to multiwindow time-frequency analysis that provides robust performance in noisy environment is proposed. The concept of robust estimates of instantaneous frequency is used to define the optimal weighting coefficients for the multiwindow spectrogram. The proposed form of multiwindow spectrogram provides improved instantaneous frequency estimation for nonstationary signals in the presence of additive Gaussian noise. The efficiency of the proposed approach is tested in the experiments.