Telecommunications – Receiver or analog modulated signal frequency converter – Measuring or testing of receiver
Reexamination Certificate
2007-07-17
2007-07-17
Urban, Edward F. (Department: 2618)
Telecommunications
Receiver or analog modulated signal frequency converter
Measuring or testing of receiver
C455S226200, C455S234100, C375S345000
Reexamination Certificate
active
10254151
ABSTRACT:
A system for detecting the level of the noise floor due to circuit noise as seen at the ADC for a wireless receiver. The system measures power after digitizing and filtering, and subtracts off any variable gain used in the analog front end to determine differentially the size of the signal at the antenna. The system further differentially detects the signal size of any incoming signal at the antenna in a similar fashion, and determines its size relative to the measured noise floor. If the level of the circuit noise of the receiver is known absolutely, the absolute signal size of the incoming signal can likewise be determined with this inventive method and system.
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patent: 4888596 (1989-12-01), Conanan
patent: 5204970 (1993-04-01), Stengel et al.
patent: 5884152 (1999-03-01), Matsumoto
patent: 6731703 (2004-05-01), Kurihara
patent: 6977915 (2005-12-01), Chen et al.
patent: 2003/0022645 (2003-01-01), Runzo
Husted Paul J.
McFarland William J.
Atheros Communications Inc.
Bever Hoffman & Harms LLP
Harms Jeanette S.
Jackson Blane J.
Urban Edward F.
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