Title :
Adaptive order and window length higher order time-frequency distributions in the IF estimation
Author :
L.J. Stankovic;V. Katkovnik;I. Djurovic
Author_Institution :
Signal Theory Group, Ruhr-Univ., Bochum, Germany
Abstract :
The L-Wigner distributions are defined in order to improve the concentration of signal´s time-frequency representation, along the instantaneous frequency (IF). The main goal of this paper is to develop an adaptive, the L-Wigner distribution based, IF estimator with the time-varying and data-driven window length and distribution order that is able to provide the quality close to the one what could be achieved if the smoothness of the IF were known in advance. The developed algorithm uses only the formula for the variance of the estimates. Simulations show good accuracy ability of the adaptive algorithm.
Keywords :
"Time frequency analysis","Interpolation","Frequency estimation","Quantization","Estimation error","Mean square error methods","Sampling methods","Shape","Flyback transformers","Signal to noise ratio"
Conference_Titel :
Electronics, Circuits and Systems, 1999. Proceedings of ICECS ´99. The 6th IEEE International Conference on
Print_ISBN :
0-7803-5682-9
DOI :
10.1109/ICECS.1999.813420