The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 30, 2007
Filed:
Mar. 12, 2003
Raymond Rizzo, Hillsborough, NC (US);
Louis Regniere, Cary, NC (US);
Raymond Rizzo, Hillsborough, NC (US);
Louis Regniere, Cary, NC (US);
Renesas Technology America, Inc., Cypress, CA (US);
Abstract
A method and apparatus are described for adaptively removing interference from a signal. A received signal is amplified linearly along a first signal path to provide a first signal and amplified nonlinearly along a second signal path to provide a second signal. The received signal propagates through the first and second signal paths at substantially the same time. The first and second amplified signals are mixed in proportion according to determined first and second weights, respectively, to provide an output signal having interference removed. The output signal is filtered to produce a first filtered signal corresponding to a ripple envelope of the output signal and filtered substantially simultaneously to produce a second filtered signal corresponding to an average peak detected value of the output signal. The first and second filtered signals are compared to produce an error signal. The first and second weights are determined according to the error signal.