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United States Patent 7,672,398
Demir , et al. March 2, 2010

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Method and system for adjusting the amplitude and phase characteristics of real and imaginary signal components of complex signals processed by an analog radio transmitter


Abstract
A method and system for determining amplitude and phase compensation values used to adjust the amplitude and phase characteristics of real and imaginary signal components of complex signals processed by an analog radio transmitter. The compensation values may be determined in response to detecting a significant temperature change in the transmitter. Corresponding amplitude and phase adjustment signals having levels that correspond to the compensation values are provided to respective amplitude and phase imbalance compensation modules to adjust the amplitude and phase characteristics of at least one of the real and imaginary signal components.


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Inventors: Demir; Alpaslan (East Meadow, NY), Kazakevich; Leonid (Plainview, NY), Kearney; Kenneth P. (Smithtown, NY)
Assignee: InterDigital Technology Corporation (Wilmington, DE)

Appl. No.: 12/275,806
Filed: November 21, 2008

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Related U.S. Patent Documents

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Application Number Filing Date Patent Number Issue Date
10740047 Dec., 2003 7460614
60482312 Jun., 2003


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Current U.S. Class: 375/298 ; 375/222; 375/296
Current International Class: H04L 27/36 (20060101); H04B 1/38 (20060101); H04L 25/49 (20060101)
Field of Search: 375/125,146,219,222,235,260-261,295,298,302,344-345,377 370/319-321,335-337,342-344,441-442 455/73,91,103,112,115.1,115.2,118,127.2,127.1,139,177.1,227,232.1,226.1,247.1,355