Telecommunications – Receiver or analog modulated signal frequency converter – Modulation distortion or cross talk correction or elimination
Reexamination Certificate
2008-01-15
2011-10-04
Jackson, Blane J (Department: 2618)
Telecommunications
Receiver or analog modulated signal frequency converter
Modulation distortion or cross talk correction or elimination
C455S296000, C455S063100
Reexamination Certificate
active
08032102
ABSTRACT:
A system for correcting a second order intermodulation product in a direct conversion receiver is provided. The system includes a cross-covariance system receiving a data signal and a second order intermodulation estimate signal and generating a cross-covariance value. An auto-covariance system receives the second order intermodulation estimate signal and generates an auto covariance value. A buffer system stores a second order intermodulation product correction factor. A divider receives the cross-covariance value, the auto-covariance value and the second order intermodulation product correction factor and generates a running average second order intermodulation product correction factor.
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Damgaard Morten
Hatcher Geoff
Molnar Alyosha
Wu Kenneth Chai-en
Axiom Microdevices, Inc.
Jackson Blane J
Jackson Walker L.L.P.
Rourk Christopher J.
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