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:
Nov. 15, 2011
Filed:
Sep. 19, 2007
Puay Hoe See, San Diego, CA (US);
Gurkanwal Singh Sahota, San Diego, CA (US);
BO Sun, Carlsbad, CA (US);
Gary John Ballantyne, Christchurch, NZ;
William Ronald Panton, San Diego, CA (US);
Zae Yong Choi, San Jose, CA (US);
Puay Hoe See, San Diego, CA (US);
Gurkanwal Singh Sahota, San Diego, CA (US);
Bo Sun, Carlsbad, CA (US);
Gary John Ballantyne, Christchurch, NZ;
William Ronald Panton, San Diego, CA (US);
Zae Yong Choi, San Jose, CA (US);
QUALCOMM, Incorporated, San Diego, CA (US);
Abstract
Transmitters supporting multiple modulation modes and/or multiple frequency bands are described. A transmitter may perform large signal polar modulation, small signal polar modulation, and/or quadrature modulation, which may support different modulation schemes and systems. Circuit blocks may be shared by the different modulation modes to reduce cost and power. For example, a single modulator and a single power amplifier may be used for small signal polar modulation and quadrature modulation. The transmitter may apply pre-distortion to improve performance, to allow a power amplifier to support multiple frequency bands, to allow the power amplifier to operate at higher output power levels, etc. Envelope and phase distortions due to non-linearity of the power amplifier may be characterized for different input levels and different bands and stored at the transmitter. Thereafter, envelope and phase signals may be pre-distorted based on the stored characterizations to compensate for non-linearity of the power amplifier.