Pulse or digital communications – Transceivers – Loopback mode
Reexamination Certificate
2007-11-19
2010-12-21
Pathak, Sudhanshu C (Department: 2611)
Pulse or digital communications
Transceivers
Loopback mode
C375S296000, C375S346000, C375S261000, C375S270000, C455S047000, C455S109000, C455S115200, C455S067160, C455S114300, C455S127100, C455S126000, C455S067110, C330S002000
Reexamination Certificate
active
07856048
ABSTRACT:
The disclosure can provide methods and systems for autocalibrating a transceiver. The method can include upconverting a bandpass input signal by mixing the bandpass input signal with a first local oscillator signal to form an initial transmitter signal. The initial transmitter signal can be looped back to a receiver and downconverted with a second local oscillator signal having a frequency that is different from the first local oscillator to form an intermediate frequency signal. At least one of a gain and a phase of the transmitter can be adjusted based on a transmitter image sideband of the intermediate frequency signal to generate a calibrated transmitter signal having minimized transmitter image sideband.
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Glas; Digital I/Q Imbalance Compensation in a Low-IF Receiver; IEEE Global Communications Conference; 1998.
Fong Neric
Smaini Lydi
Son Sang Won
Wang Bo
Marvell International Ltd.
Pathak Sudhanshu C
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