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. 08, 2005
Filed:
Oct. 22, 2003
Robert E. Johnson, Randolph, NJ (US);
Ruikang Yang, Bridgewater, NJ (US);
Robert E. Johnson, Randolph, NJ (US);
Ruikang Yang, Bridgewater, NJ (US);
Andrew Corporation, Orland Park, IL (US);
Abstract
Current and previous input signal power measures are used to generate a combined index value that is applied to one or more composite look-up tables (e.g., an I LUT and a Q LUT) to retrieve one or more pre-distortion parameters (e.g., I and Q). In one embodiment, a combined index value is generated by concatenating current and previous power measures, where each composite LUT maps all possible combinations of the current and previous power measures to the corresponding pre distortion parameters values. By using a composite LUT for each of I and Q, the overall signal processing time of the pre-distortion processing can be greatly reduced relative to the prior art, resulting in a significantly smaller RF delay line used to delay the input signal and thereby providing a less costly and more efficient amplifier system.