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. 09, 2007
Filed:
May. 22, 2003
Applicant:
Antony James Smithson, North Yorkshire, GB;
Inventor:
Antony James Smithson, North Yorkshire, GB;
Assignee:
Andrew Corporation, Westchester, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03F 1/26 (2006.01);
U.S. Cl.
CPC ...
Abstract
A digital predistorter comprises a module J for producing a counteracting signal Vfor combination with the input signal of a power amplifier to correct the output of the amplifier for distorting memory effects within the amplifier. The module J produces the contracting signal Vby convolving (see FIG.) functions of the input signal with impulse response characteristics related to the memory effects being corrected. The counteracting signal Vis produced by a function fand parameters in that function are adjusted to minimize any residual distortion in the amplifier output.