Parameter estimation method and apparatus
First Claim
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1. A method comprising:
- generating a model of a power amplifier block based on modeled output signal values of the power amplifier block and sampled output signal values of the power amplifier block.
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Abstract
A power amplifier predistortion method involves generating a reverse model of a power amplifier block. The reverse model is based on modeled output signal values of the power amplifier block and sampled output signal values of the power amplifier block.
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Citations
12 Claims
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1. A method comprising:
generating a model of a power amplifier block based on modeled output signal values of the power amplifier block and sampled output signal values of the power amplifier block. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A predistortion method comprising:
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generating a forward model of a power amplifier block;
generating a reverse model of the power amplifier block based on modeled output signal values from the forward model of the power amplifier block and sampled output signal values of the power amplifier block; and
estimating parameters of a distortion function based on the reverse model; and
distorting an input signal to the power amplifier block based on the distortion function. - View Dependent Claims (8)
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9. A predistortion system comprising:
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a predistorter that distorts input signal values to produce output signal values at a first sample rate;
a power amplifier block including an amplification chain that amplifies the output signal values of the predistorter to produce an amplified signal, and a feedback receiver that samples the amplified signal at a second sample rate to produce sampled output signal values;
a forward modeler that models the power amplifier block in a forward direction to produce modeled output signal values; and
a parameter estimator that updates parameters of the predistorter based on the sampled output signal values from the feedback receiver and the modeled output signal values from the forward modeler. - View Dependent Claims (10, 11, 12)
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Specification