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:
Apr. 12, 2005
Filed:
Jun. 13, 2002
Applicant:
J. David Unger, Windham, NH (US);
Inventor:
J. David Unger, Windham, NH (US);
Assignee:
BigBand Networks BAS, Inc., Westborough, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04K001/02 ; H04L025/03 ; H04L025/49 ;
U.S. Cl.
CPC ...
Abstract
The signal distortion present in a transmitted signal is measured and used to generate filter coefficients. The coefficients are stored in memory. A modulator generates an intermediate frequency signal. The modulator inputs the signal to a programmable predistortion filter. The characteristics of the filter are altered by the filter coefficients that have been programmed into the filter. The resulting filtered signal is upconverted to a frequency in a transmit frequency band.