Feedforward amplitude cancellation topology for...

Details Feedforward amplitude cancellation topology for... Feedforward amplitude cancellation topology for...

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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Yang et al., 2000, Digital Controlled Adaptive Feedforward Amplifier for IMT-2000 Band.

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