| US 7,340,381 B2 | ||
| Characterization of radio frequency (RF) signals using wavelet-based parameter extraction | ||
| Mani Soma, Seattle, Wash. (US); Welela Haileselassie, Poughkeepsie, N.Y. (US); and Jessica Yan, Bothell, Wash. (US) | ||
| Assigned to University of Washington, Seattle, Wash. (US) | ||
| Filed on Sep. 18, 2003, as Appl. No. 10/665,970. | ||
| Claims priority of provisional application 60/415975, filed on Oct. 04, 2002. | ||
| Claims priority of provisional application 60/416033, filed on Oct. 04, 2002. | ||
| Prior Publication US 2004/0117160 A1, Jun. 17, 2004 | ||
| Int. Cl. H03F 1/26 (2006.01) | ||
| U.S. Cl. 702—189 [702/79] | 30 Claims |
| 6. A method, comprising:
computing scale level 1 coefficients as pairwise differences of samples of a radio frequency (RF) signal;
computing scale level 1 coefficients as pairwise averages of the samples;
searching for a local maxima and a local minima of the scale level 1 coefficients;
computing time coordinates for the local maxima and minima of the scale level 1 coefficients;
computing scale level 2 coefficients as pairwise differences of the scale level 1 averages;
searching for local maxima and minima of the scale level 2 coefficients;
computing time coordinates for the local maxima and minima of the scale level 2 coefficients; and
presenting the time coordinates for the local maxima and minima of the scale level 2 coefficients to characterize the RF signal.
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