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:
Aug. 12, 2014
Filed:
Dec. 01, 2011
Roberto Rimini, San Diego, CA (US);
Mohammad Omer, Atlanta, GA (US);
Joseph Patrick Burke, Glenview, IL (US);
Peter D. Heidmann, Encinitas, CA (US);
Roberto Rimini, San Diego, CA (US);
Mohammad Omer, Atlanta, GA (US);
Joseph Patrick Burke, Glenview, IL (US);
Peter D. Heidmann, Encinitas, CA (US);
QUALCOMM Incorporated, San Diego, CA (US);
Abstract
A method and apparatus for a non-linear adaptive scheme for transmit out of band emission cancellation is provided. Embodiments disclosed herein provide a method for removing unwanted transmitter emissions from a composite received signal. The method performs the steps of: extracting the I and Q samples from a modulator output; inputting the I and Q samples to a non-linear filter; applying weights to the non-linear filter outputs, combining the non-linear filter outputs to generate a broadband emission estimate; selecting a portion of a transmit emission in a desired portion of a receive band; subtracting an output of the non-linear filter from a composite signal; and feeding back a residual error to the non-linear filter; adapting the non-linear filter iteratively.