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:
Oct. 05, 2004
Filed:
Sep. 17, 2002
Applicant:
Inventor:
Rajiv Chandrasekaran, Basking Ridge, NJ (US);
Assignee:
Andrew Corporation, Orland Park, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03F 1/26 ; H03K 1/02 ;
U.S. Cl.
CPC ...
H03F 1/26 ; H03K 1/02 ;
Abstract
A pre-distorter pre-distorts an input signal prior to being applied to an amplifier in order to reduce spurious emissions in the resulting amplified signal. The pre-distorter implements an inverted version of a model of the amplifier that models both the frequency independent (FI) characteristics of the amplifier as well as the frequency-independent (FD) characteristics of the amplifier. Techniques and architectures are presented for (1) generating and updating the model, (2) inverting the model, and (3) updating the inverted model.