Signal-to-noise ratio estimation using higher-order moments
Signal Processing
Time--frequency feature representation using energy concentration: An overview of recent advances
Digital Signal Processing
HOS-based mode classification for infomobility framework
First International Workshop on Cognitive Wireless Networks
Techniques to obtain good resolution and concentrated time-frequency distributions: a review
EURASIP Journal on Advances in Signal Processing
Validity-guided fuzzy clustering evaluation for neural network-based time-frequency reassignment
EURASIP Journal on Advances in Signal Processing - Special issue on time-frequency analysis and its applications to multimedia signals
Hi-index | 35.68 |
This paper presents an analysis of the representation of instantaneous frequency using time-frequency distributions of energy density domain. Similarity to the “ideal” instantaneous frequency presentation is chosen as a criterion for comparison of various distributions. Although all the commonly used distributions suffer from the artifacts along frequency axis, it is shown that the Wigner distribution is the best among them, with respect to this criterion. The generalization of Wigner distribution-LWD-is introduced to decrease the artifacts. The properties of the LWD are analyzed. It is shown that, at the expense of an insignificant increase in computation time, much better results are obtained. The theory is illustrated by a numerical example with the frequency modulated signals