Pulse or digital communications – Receivers – Interference or noise reduction
Reexamination Certificate
2007-10-15
2010-10-05
Kim, Kevin Y (Department: 2611)
Pulse or digital communications
Receivers
Interference or noise reduction
Reexamination Certificate
active
07809094
ABSTRACT:
A device and method for canceling or attenuating harmonics noise without distorting the incoming signal. An exemplary device includes the use of an estimation loop to generate an artificial signal to eliminate or attenuate the influence of harmonics. The estimation loop includes a mixer adapted to produce a mixed signal by processing or combining the incoming signal and the artificial signal. The estimation loop includes an error detector, a low-pass filter, a parameter estimator, and a numerically controlled oscillator. The parameter estimator produces information relating to the phase, frequency, and amplitude of an incoming harmonics spur and will be used by the numerically controlled oscillator to generate the artificial signal. If the mixed signal contains relatively low levels of harmonics residuals, the mixed signal is produced at the output in lieu of the incoming signal.
REFERENCES:
patent: 7103342 (2006-09-01), Kusbel et al.
patent: 7366088 (2008-04-01), Bolinth et al.
patent: 2005/0175132 (2005-08-01), Yang
patent: 2005/0276363 (2005-12-01), Joublin et al.
Liu Binfan
Radionov Vladimir
Xu Junyi
Zhang Weimin
BroadLogic Network Technologies Inc.
Kim Kevin Y
Townsend and Townsend / and Crew LLP
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