Linearization of amplifiers using baseband detection and...

Details Linearization of amplifiers using baseband detection and... Linearization of amplifiers using baseband detection and...

2008-01-22

2008-01-22

Fan, Chieh M. (Department: 2611)

Pulse or digital communications

Transmitters

Antinoise or distortion

C375S296000, C375S141000, C375S130000, C330S149000, C330S151000, C330S136000, C455S114300, C455S063100, C455S126000

Reexamination Certificate

active

07321635

ABSTRACT:
In an amplifier system that linearizes an amplifier by pre-distorting the input signal prior to amplification, a baseband pre-distortion processor processes the input signal in a digital baseband domain to generate one or more pre-distortion parameters based on the power of the digital baseband input signal. The digital baseband signal is up-converted and D/A-converted into a non-baseband (e.g., IF or RF) signal which is then pre-distorted, e.g., using a phase/gain adjuster or a vector modulator. By generating the pre-distortion parameters at baseband, while pre-distorting the input signal at non-baseband, the amplifier system avoids the cost and inaccuracies associated with analog signal delay and RF power detection of prior-art “all-RF” pre-distortion implementations, while avoiding the wider-bandwidth filtering of prior-art “all-baseband” pre-distortion implementations.

REFERENCES:
patent: 5760646 (1998-06-01), Belcher et al.
patent: 6304140 (2001-10-01), Thron et al.
patent: 6496062 (2002-12-01), Nitz et al.
patent: 2002/0034260 (2002-03-01), Kim
patent: 2002/0047746 (2002-04-01), Dartois
patent: 2002/0171485 (2002-11-01), Cova
patent: 2002/0186783 (2002-12-01), Opas et al.
patent: 2002/0187761 (2002-12-01), Im et al.
patent: 2003/0020538 (2003-01-01), Kim
patent: 2003/0045253 (2003-03-01), Hongo et al.
patent: 2003/0063686 (2003-04-01), Giardina et al.
patent: 2003/0117215 (2003-06-01), O'Flaherty et al.
patent: 2004/0021517 (2004-02-01), Irvine et al.

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