Predistorter for phase modulated signals with low peak to average ratios
First Claim
1. A polynomial predistorer configured for use with an RF power amplifier, the polynomial predistorter comprising:
- a polynomial generator configured to receive an RF input signal and generate a predistortion function based thereon; and
a combiner circuit coupled to the polynomial generator and configured to combine the RF input signal with the predistortion function to form a predistorted input signal;
the predistorted input signal operable to improve at least one of the adjacent channel power and the error vector magnitude performance of the RF power amplifier.
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Abstract
An amplifier system containing a polynomial predistorer and a polynominal predistorter configured for use with an RF power amplifier, the polynomial predistorter having a polynomial generator configured to receive an RF input signal and generate a predistortion function based thereon, and a combiner circuit also configured to receive the RF input signal and coupled to the polynomial generator and configured to combine the RF input signal with the predistortion function to form a predistorted input signal, the predistorted input signal operable to improve the adjacent channel power and/or the error vector magnitude performance of the RF power amplifier.
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Citations
56 Claims
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1. A polynomial predistorer configured for use with an RF power amplifier, the polynomial predistorter comprising:
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a polynomial generator configured to receive an RF input signal and generate a predistortion function based thereon; and
a combiner circuit coupled to the polynomial generator and configured to combine the RF input signal with the predistortion function to form a predistorted input signal;
the predistorted input signal operable to improve at least one of the adjacent channel power and the error vector magnitude performance of the RF power amplifier. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. An amplifier system comprising an RF power amplifier and a polynomial predistorter, the polynomial predistorter comprising:
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a polynomial generator configured to receive an RF input signal and generate a predistortion function based thereon; and
,a combiner circuit coupled to the polynomial generator and configured to combine the RF input signal with the predistortion function to form a predistorted input signal;
the predistorted input signal operable to improve at least one of the adjacent channel power and the error vector magnitude performance of the RF power amplifier. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
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41. A method of predistorting an input signal applied to an RF power amplifier, the method comprising:
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receiving an RF input signal;
generating a predistortion function based on the RF input signal; and
combining the RF input signal with the predistortion function to improve at least one of the adjacent channel power and the error vector magnitude performance of the RF power amplifier. - View Dependent Claims (42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56)
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Specification