Pulse or digital communications – Testing – Signal noise
Reexamination Certificate
2005-06-09
2009-02-17
Liu, Shuwang (Department: 2611)
Pulse or digital communications
Testing
Signal noise
C375S260000, C381S083000, C600S507000, C704S206000
Reexamination Certificate
active
07492814
ABSTRACT:
Removing noise and interference from a signal by calculating a joint time-frequency domain of the signal, estimating instantaneous frequencies of the joint time-frequency domain, modifying each estimated instantaneous frequency, if necessary, to correspond to a frequency of the joint time-frequency domain to which it most closely compares, redistributing elements within the joint time-frequency domain according to the modified instantaneous frequencies, computing a magnitude for each element in the redistributed joint time-frequency domain, plotting the results, identifying peak values, eliminating from the redistributed joint time-frequency domain elements that do not correspond to the peak values, identifying noise and interference in the peak values, eliminating the noise and the interference from the redistributed joint time-frequency domain elements, and recovering a signal devoid of noise and interference from the modified redistributed joint time-frequency domain.
REFERENCES:
patent: 6175602 (2001-01-01), Gustafsson et al.
patent: 6266633 (2001-07-01), Higgins et al.
patent: 6792057 (2004-09-01), Kabel et al.
patent: 6795559 (2004-09-01), Taura et al.
patent: 6801889 (2004-10-01), Walker
patent: 6826392 (2004-11-01), Tsuji et al.
patent: 7016739 (2006-03-01), Bange et al.
patent: 7085721 (2006-08-01), Kawahara et al.
patent: 7139338 (2006-11-01), Wilson et al.
patent: 2002/0173276 (2002-11-01), Tschirk
Dogulas J. Nelson, Cross-spectral methods for processing speech, Nov. 2001, J. Acosut. Soc. Am. 110 (5), Pt 1.
Liu Shuwang
Morelli Robert D.
Patel Dhaval
The U.S. Government as Represented by the Director of the Nation
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