Method and system for linearizing an amplified signal
AssigneeRaytheon Company
InventorLawrence P. Strickland
Life of this patent
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Abstract
A method of processing an input signal to produce a corrected output signal includes generating a pre-distorted signal by distorting a digital input signal, the distortion based upon characteristics of a main amplifier, and correcting an output signal of the main amplifier to produce the corrected output signal. The output signal of the main amplifier is generated by amplifying the pre-distorted signal with the main amplifier. The correcting is based on a comparison of a signal indicative of the main amplifier output signal and a signal indicative of the digital input signal.
Claims20
A method of processing a digital input signal to produce a corrected output signal, comprising:
- generating a pre-distorted signal by distorting the digital input signal, the distortion based upon characteristics of a main amplifier;
- and
- correcting an output signal of the main amplifier to produce the corrected output signal, the output signal of the main amplifier generated by amplifying the pre-distorted signal with the main amplifier, the correcting based on a comparison of:
- a signal indicative of the main amplifier output signal;
- and
- a signal indicative of the digital input signal.
A system for processing a digital input signal to produce a corrected output signal, comprising:
- a pre-distortion system operable to generate a pre-distorted signal by distorting the digital input signal, the distortion based upon characteristics of a main amplifier;
- and
- a feed-forward system operable to correct an output signal of the main amplifier to produce the corrected output signal, the main amplifier output signal generated by amplifying the pre-distorted signal with the main amplifier, the correction based on a comparison of:
- a signal indicative of the main amplifier output signal;
- and
- a signal indicative of the digital input signal.
A method of processing an input signal to produce a corrected output signal, comprising:
- determining characteristics of a main amplifier based upon adaptive processing of a main amplifier output signal;
- generating a pre-distorted signal by distorting the input signal, the distortion based upon the characteristics of the main amplifier;
- and
- correcting an output signal of the main amplifier to produce the corrected output signal, the output signal of the main amplifier generated by amplifying the pre-distorted signal with the main amplifier, the correcting based on a comparison of:
- a signal indicative of the main amplifier output signal;
- and
- a signal indicative of the input signal.
Dependencies are inferred from the claim text.