New higher order spectra and time-frequency representations for dispersive signal analysis
Document Type
Conference Proceeding
Date of Original Version
12-1-1998
Abstract
For an analysis of signals with arbitrary dispersive phase laws, we extend the concept of higher order moment functions and define their associated higher order spectra. We propose a new higher order time-frequency representation (TFR), the higher order generalized warped Wigner distribution (HOG-WD). The HOG-WD is obtained by warping the previously proposed higher order Wigner distribution, and is important for analyzing signals with arbitrary time-dependent instantaneous frequency. We discuss links to prior higher order techniques and investigate properties of the HOG-WD. We extend the HOG-WD to a class of higher order, alternating sign, frequency-shift covariant TFRs. Finally, we demonstrate the advantage of using the generalized higher order spectra to detect phase coupled signals with dispersive instantaneous frequency characteristics. © 1998 IEEE.
Publication Title, e.g., Journal
ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
Volume
4
Citation/Publisher Attribution
Murray, Robin L., Antonia Papandreou-Suppappola, and G. F. Boudreaux-Bartels. "New higher order spectra and time-frequency representations for dispersive signal analysis." ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings 4, (1998): 2305-2308. doi: 10.1109/ICASSP.1998.681610.