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Predistortion factor determination for predistortion in power amplifiers

A power amplifier and pre-compensation technology, which is applied to power amplifiers, parts of amplifiers, amplifiers, etc., can solve the problem of consuming a lot of resources

Inactive Publication Date: 2015-05-06
MEDIATEK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Both of the above traditional techniques require resource-intensive data transformations

Method used

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  • Predistortion factor determination for predistortion in power amplifiers
  • Predistortion factor determination for predistortion in power amplifiers
  • Predistortion factor determination for predistortion in power amplifiers

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Embodiment Construction

[0066]The following embodiments and related drawings can fully illustrate the inventive concepts of the present application. Similar element numbers in the various figures correspond to similar functions or elements. It should be noted that the term “the present invention” here is used to refer to the inventive concepts presented in these embodiments, but its scope is not limited to these embodiments themselves. In addition, the mathematical expressions in this specification are used to illustrate the principles and logics related to the embodiments of the present invention, and do not limit the scope of the present invention unless otherwise specified. Those of ordinary skill in the technical field to which the present invention pertains can understand that there are various techniques to realize the physical representation forms corresponding to these mathematical formulas.

[0067] The drawings of the present invention include functional block diagrams representing various...

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Abstract

A baseband signal is generated as a sequence of complex sample values at a predetermined sample rate. A sample of the baseband signal is captured as is a sample of an output signal generated by a power amplifier from the captured sample of the baseband signal. Complex values are iteratively assigned to a complex factor intended for predistorting data such that the product of the baseband signal sample and the complex factor converges towards equivalence with the output signal sample with each iterative assignment of the complex values to the complex factor. The complex factor is stored in memory at an address associated with the value of the captured baseband signal sample.

Description

technical field [0001] The present invention is related to distortion compensation of power amplifiers. Background technique [0002] For RF power amplifiers, linearity and energy efficiency are two conflicting design parameters. Good linearity avoids symbol constellation and / or spectrum corruption. High energy efficiency means lower power consumption, which is especially important for battery-powered devices. Unfortunately, power amplifiers with the best energy efficiency have the worst linearity of the input / output signal relationship. Predistortion is one of several techniques used to balance linearity and energy efficiency. [0003] The complex gain G of the power amplifier D Can be quantified as the ratio of the output signal Y of the power amplifier to the input signal X: [0004] G D = Y X = Y Re + ...

Claims

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Application Information

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IPC IPC(8): H03F1/32H03F1/02H03F3/20
CPCH03F1/3241H04B1/0475H04B2001/0425
Inventor 胡拉姆·穆罕默德
Owner MEDIATEK INC