Nonlinear behavior models and methods for use thereof in wireless radio systems
DCFirst Claim
1. A behavioral model of a nonlinear dynamic system, the model comprising:
- a first module characterizing dynamic nonlinear characteristics of the system, wherein the first module includes an input and an output; and
a second module characterizing static nonlinear characteristics of the nonlinear system, wherein the second module includes an input and an output;
wherein the first module is coupled to the second module.
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Abstract
Disclosed is a behavioral model for wide-band radio frequency transmitters. Also disclosed are various implementation of the behavioral model for purpose of baseband predistortion of dynamic nonlinear systems, such as wideband wireless transmitters and power amplifiers. In one example embodiment, a LBG behavioral model comprises two non-linear cascading modules: a dynamic weak nonlinear (DWNL) module, which models dynamic week nonlinearities of the system, and a static strong nonlinear (SSNL) module, which models static strong nonlinearities of the system. In one example embodiment, a forward LBG model includes DWNL module followed by the SSNL module. In another example embodiment, a reverse LBG model includes SSNL module followed by DWNL module.
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Citations
22 Claims
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1. A behavioral model of a nonlinear dynamic system, the model comprising:
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a first module characterizing dynamic nonlinear characteristics of the system, wherein the first module includes an input and an output; and a second module characterizing static nonlinear characteristics of the nonlinear system, wherein the second module includes an input and an output; wherein the first module is coupled to the second module. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A predistorter for nonlinear wireless system, the predistorter comprising:
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a dynamic nonlinear predistorter module; and a static nonlinear predistorter module coupled to the dynamic nonlinear predistorter module such that an output of the dynamic nonlinear predistorter module is input to the static nonlinear predistorter module. - View Dependent Claims (8, 9, 10)
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11. A predistorter for nonlinear wireless system, the predistorter comprising:
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a static nonlinear predistorter module; and dynamic nonlinear predistorter module coupled to the static nonlinear predistorter module such that an output of the static nonlinear predistorter module is input to the dynamic nonlinear predistorter module. - View Dependent Claims (12, 13, 14)
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15. An augmented Wiener predistorter, the predistorter comprising:
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a dynamic nonlinear first order predistorter module; and a static nonlinear predistorter module coupled to the dynamic nonlinear predistorter module such that an output of the dynamic nonlinear predistorter module is input to the static nonlinear predistorter module. - View Dependent Claims (16, 17, 18)
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19. An augmented Hammerstein predistorter, the predistorter comprising:
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a static nonlinear predistorter module; and a dynamic nonlinear first order predistorter module coupled to the static nonlinear predistorter module such that an output of the static nonlinear predistorter module is input to the dynamic nonlinear predistorter module. - View Dependent Claims (20, 21, 22)
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Specification