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United States Patent 7,664,201
Kazakevich , et al. February 16, 2010

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Digital automatic gain control


Abstract
An automatic gain control system prevents input overload by precisely controlling the input level of a received, digitally modulated signal without variable gain amplification. Limiting amplification in conjunction with a logarithmic detection splits an input signal path in two, providing separate phase and amplitude information for downstream digital signal processing, where the separate phase and amplitude information is processed without variable gain artifacts. The separated phase information may further be divided into I and Q signals.


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Inventors: Kazakevich; Leonid (Plainview, NY), Ozluturk; Fatih (Port Washington, NY)
Assignee: InterDigital Technology Corporation (Wilmington, DE)

Appl. No.: 11/113,603
Filed: April 25, 2005

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Related U.S. Patent Documents

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Application Number Filing Date Patent Number Issue Date
09817455 Mar., 2001 6934344
60192289 Mar., 2000


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Current U.S. Class: 375/297
Current International Class: H04K 1/02 (20060101)
Field of Search: 375/295-297