SYSTEM LINEARIZATION
First Claim
1. A method for linearizing a non-linear system element comprising:
- acquiring data representing inputs and corresponding outputs of the non-linear system element;
applying a model parameter estimation procedure using the acquired data to determine model parameters of a model characterizing input-output characteristics of the non-linear element;
accepting an input signal representing a desired output signal of the non-linear element;
processing the input signal to form a modified input signal according to the determined model parameters, the processing including, for each of a series of successive samples of the input signal applying an iterative procedure to determining a sample of the modified input signal according to a predicted output of the model of the non-linear element; and
providing the modified input signal for application to the input of the non-linear element.
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Abstract
A method for linearizing a non-linear system element includes acquiring data representing inputs and corresponding outputs of the non-linear system element. A model parameter estimation procedure is applied to the acquired data to determine model parameters of a model characterizing input-output characteristics of the non-linear element. An input signal representing a desired output signal of the non-linear element is accepted and processed to form a modified input signal according to the determined model parameters. The processing includes, for each of a series of successive samples of the input signal, applying an iterative procedure to determining a sample of the modified input signal according to a predicted output of the model of the non-linear element. The modified input signal is provided for application to the input of the non-linear element.
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Citations
18 Claims
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1. A method for linearizing a non-linear system element comprising:
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acquiring data representing inputs and corresponding outputs of the non-linear system element; applying a model parameter estimation procedure using the acquired data to determine model parameters of a model characterizing input-output characteristics of the non-linear element; accepting an input signal representing a desired output signal of the non-linear element; processing the input signal to form a modified input signal according to the determined model parameters, the processing including, for each of a series of successive samples of the input signal applying an iterative procedure to determining a sample of the modified input signal according to a predicted output of the model of the non-linear element; and providing the modified input signal for application to the input of the non-linear element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A system for linearizing a non-linear element, the system comprising:
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an estimator configure to accept data representing inputs and corresponding outputs of the non-linear system element and apply a model parameter estimation procedure to determine model parameters of a model characterizing input-output characteristics of the non-linear element; and a predistorter including a input for accepting an input signal representing a desired output signal of the non-linear element, an input for accepting the model parameters from the estimator, and a processing element for forming a modified input signal from the input signal, the processing element being configured to perform functions including, for each of a series of successive samples of the input signal applying an iterative procedure to determining a sample of the modified input signal according to a predicted output of the model of the non-linear element, and an output for providing the modified input signal for application to the input of the non-linear element. - View Dependent Claims (13, 14, 15, 16, 17)
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18. Software stored on a non-transitory comprising instructions for causing a data processor to perform functions including:
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acquiring data representing inputs and corresponding outputs of the non-linear system element; applying a model parameter estimation procedure using the acquired data to determine model parameters of a model characterizing input-output characteristics of the non-linear element; accepting an input signal representing a desired output signal of the non-linear element; processing the input signal to form a modified input signal according to the determined model parameters, the processing including, for each of a series of successive samples of the input signal applying an iterative procedure to determining a sample of the modified input signal according to a predicted output of the model of the non-linear element; and providing the modified input signal for application to the input of the non-linear element.
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Specification