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:
Mar. 29, 2011
Filed:
Aug. 18, 2006
Turgut Aytur, Plattsburgh, NY (US);
Stephan Ten Brink, Irvine, CA (US);
Ravishankar H. Mahadevappa, Irvine, CA (US);
Ran Yan, Holmdel, NJ (US);
Turgut Aytur, Plattsburgh, NY (US);
Stephan ten Brink, Irvine, CA (US);
Ravishankar H. Mahadevappa, Irvine, CA (US);
Ran Yan, Holmdel, NJ (US);
Realtek Semiconductor Corp., Hsinchu, TW;
Abstract
An automatic gain control method and system for use in signal processing of OFDM symbols at a receiver. Two stages of coarse and fine automatic gain control are implemented that adjust different gains in an analog RF processing stage of the receiver. Gain of a low noise amplifier and a mixer are adjusted during a first and coarse automatic gain control stage based on feedback from a digital baseband stage. During a subsequent fine gain control period, the gain of a programmable gain amplifier is adjusted separately for each frequency band used by the OFDM symbols based on a histogram bin that counts the number of output samples of an analog to digital converter whose magnitude falls within certain ranges. Coarse and fine gains are updated after each OFDM symbol.