Pulse or digital communications – Receivers – Interference or noise reduction
Reexamination Certificate
2006-06-27
2006-06-27
Burd, Kevin (Department: 2631)
Pulse or digital communications
Receivers
Interference or noise reduction
C375S316000
Reexamination Certificate
active
07068745
ABSTRACT:
A multi-carrier receiver system and method for receiving a transmission frequency multi-carrier signal include a feedforward cancellation loop. A frequency conversion circuit generates an intermediate frequency (IF) multi-carrier signal based on the transmission frequency multi-carrier signal. The feedforward cancellation loop generates an amplitude corrected multi-carrier signal based on the IF multi-carrier signal such that the amplitude corrected multi-carrier signal has a reduced dynamic range with respect to the IF multi-carrier signal. A primary A/D converter having a significantly lower dynamic range requirements can therefore generate a digital multi-carrier signal based on the amplitude corrected multi-carrier signal. The feedforward cancellation loop therefore enables the primary A/D converter to process multi-carrier signals without the need for large dynamic range requirements.
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Harnden Robert R.
Keller Mark V.
Kintis Mark
Lochhead Donald L.
Martin Donald R.
Burd Kevin
Carmen B. Patti & Assoc. LLC
Northrop Gruman Corporation
Torres Juan Alberto
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