Patent ID: 8121221

Claim:
A system for calibrating gain of a radio receiver (“Rx”) path comprising: a radio receiver subsystem including: a thermal noise source configured to provide a calibration signal, an Rx path, and one or more filters, each being modeled to respectively have a thermal noise source value, an Rx path noise figure value, and an equivalent noise bandwidth for said one or more filters, and a gain adjuster to adjust a gain of said radio receiver subsystem; and a processor configured to communicate with a central processing unit (“CPU”) of a networked computing device, said processor comprising a gain calibrator including: a parameter generator to provide parameter values for deriving an effective input noise power signal value, said parameter values including said thermal noise source value, said Rx path noise figure value, and said equivalent noise bandwidth, an output quantifier to measure an output noise power signal from said Rx path to form a measured output noise power signal value, and a gain evaluator configured to determine a gain differential between a calculated gain and an expected gain, said calculated gain being a function of said measured output noise power signal value and said effective input noise power signal value, wherein said gain differential is passed to said gain adjuster for calibrating said gain.