APPARATUS AND METHODS FOR PROVIDING A POWER AMPLIFIER WITH INTERFERENCE CANCELLATION
First Claim
1. An electronic circuit system for amplifying an input signal, comprising:
- a first circuit comprising a power amplifier, configured to receive a first branch of an input signal, and generate a first amplified signal based on the input signal of the first branch; and
a second circuit, configured to receive a second branch of the input signal, generate a cancellation signal based on the input signal of the second branch, and combine the first amplified signal and the cancellation signal to generate a second amplified signal,wherein the second circuit comprises an interference re-construction module, which is configured to model an inverse characteristic of residual distortion and interference of the first circuit via a predefined re-construction function, and generate an anti-phased interference signal based on the input signal of the second branch and the predefined re-construction function, and wherein the cancellation signal is generated from the anti-phased interference signal.
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Abstract
Methods and apparatus are provided for amplifying an input signal. An electronic circuit system comprises a first circuit comprising a power amplifier, configured to receive a first branch of an input signal, and generate a first amplified signal based on the input signal of the first branch; a second circuit, configured to receive a second branch of the input signal, generate a cancellation signal based on the input signal of the second branch, and combine the first amplified signal and the cancellation signal to generate a second amplified signal. The second circuit comprises an interference re-construction module, which is configured to model an inverse characteristic of residual distortion and interference of the first circuit via a predefined re-construction function, and generate an anti-phased interference signal based on the input signal of the second branch and the predefined re-construction function. The cancellation signal is generated from the anti-phased interference signal.
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Citations
13 Claims
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1. An electronic circuit system for amplifying an input signal, comprising:
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a first circuit comprising a power amplifier, configured to receive a first branch of an input signal, and generate a first amplified signal based on the input signal of the first branch; and a second circuit, configured to receive a second branch of the input signal, generate a cancellation signal based on the input signal of the second branch, and combine the first amplified signal and the cancellation signal to generate a second amplified signal, wherein the second circuit comprises an interference re-construction module, which is configured to model an inverse characteristic of residual distortion and interference of the first circuit via a predefined re-construction function, and generate an anti-phased interference signal based on the input signal of the second branch and the predefined re-construction function, and wherein the cancellation signal is generated from the anti-phased interference signal. - View Dependent Claims (2, 3, 4, 5, 6, 13)
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7. A method for amplifying an input signal, comprising:
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amplifying the input signal via a power amplifier in a first circuit to generate a first amplified signal in a first circuit; and generating a cancellation signal based on the input signal in a second circuit; and combining the first amplified signal and the cancellation signal to generate a second amplified signal, wherein the generating of the cancellation signal comprises; modeling an inverse characteristic of residual distortion and interference of the first circuit via a predefined re-construction function; constructing an anti-phased interference signal based on the input signal and the predefined re-construction function; and generating the cancellation signal from the anti-phased interference signal. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification