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:
Sep. 04, 2012
Filed:
Jul. 30, 2008
Xin Liang, Beijing, CN;
Xin-xing Yang, Beijing, CN;
Xin Liang, Beijing, CN;
Xin-Xing Yang, Beijing, CN;
Motorola Mobility LLC, Libertyville, IL (US);
Abstract
An apparatus for generating a multicarrier communication signal having a reduced crest factor enables efficient power amplifier operation. The apparatus includes a plurality of shaping filters (-) for outputting a plurality of shaped baseband transmission signals. A plurality of mixers (-) then multiplies each signal by one of a plurality of complex carrier signals. A window function generator () generates a clipping window signal based on power levels of the unshaped baseband transmission signals. A plurality of window output units (-) outputs a plurality of subtraction-based clipping window signals. At least one summing unit () then generates the multicarrier communication signal having the reduced crest factor from the plurality of subtraction-based clipping window signals and the plurality of shaped baseband transmission signals.