Compensation device for power amplifier and related method

A technology of a power amplifier and a compensation device, which is applied in the field of compensation devices for predistortion amplitude value and predistortion phase value, can solve problems such as poor communication quality and affecting channels, etc.

Active Publication Date: 2013-01-16
REALTEK SEMICON CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that the amplitude modulation distortion effect and the phase modulation distortion effect occur when the power amplifier operates in the nonlinear region
[0004] However, users usually want the operation of the application circuit to be a linear operation, so that all parameters will show a multiple relationship. If the application circuit operates in the non-linear region, it will cause a lot of harmonics (harmonic). And then affect other channels, in this way, it will cause poor communication quality

Method used

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  • Compensation device for power amplifier and related method
  • Compensation device for power amplifier and related method
  • Compensation device for power amplifier and related method

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Embodiment Construction

[0039] First, the concept of the present invention is briefly described to help understand the technical features disclosed in the present invention. Please refer to figure 2 , figure 2 (contains figure 2 A. figure 2 B and figure 2 C) is a schematic diagram illustrating an amplitude compensation curve and a phase compensation curve applied to a power amplifier of the present invention. like figure 2 As shown in A, since the linearity of the power amplifier 120 is not ideal in fact, a pre-compensation circuit 110 (or a pre-distortion circuit) is arranged in the front stage of the power amplifier 120 in the present invention, and an input signal input SIN is input to Before the power amplifier 110, the pre-compensation circuit 110 uses a pre-distortion amplitude value and a pre-distortion phase value to pre-compensate the input signal SIN. like figure 2 As shown in B, a plurality of predistortion amplitude values ​​constitute an amplitude compensation curve S1. Sin...

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Abstract

The invention discloses a compensation device for a power amplifier and a related method. The method for determining a pre-distortion value of the power amplifier comprises the following steps of: providing a first power input signal to make the power amplifier generate a first power output signal; receiving a first receiving signal which is acquired according to the first power output signal; detecting the predetermined gain of the power amplifier by using the first power input signal and the first receiving signal; providing a second power input signal to make the power amplifier generate a second power output signal; receiving a second receiving signal which is acquired according to the second power output signal; and determining a pre-distortion amplitude value and a pre-distortion phase value of the power amplifier by using the predetermined gain, the second power input signal and the second receiving signal.

Description

technical field [0001] The present invention relates to a compensation device applied to a power amplifier and a related method thereof, in particular to a method for determining a power input signal using a predetermined gain of a power amplifier, a power input signal with different amplitude strengths, and a received signal corresponding to the power input signal. A compensating device for a predistortion amplitude value and a predistortion phase value of a power amplifier and a related method thereof. Background technique [0002] In today's integrated circuits, power amplifiers have been widely used in various application circuits, such as a communication system. Generally speaking, a power amplifier is used as a gain stage to amplify an input signal. However, in practice, the linearity of the power amplifier is not ideal. [0003] Please refer to figure 1 (contains figure 1 A and figure 1 B), where, figure 1 A is a schematic diagram illustrating an amplitude modula...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F3/20H03G1/04
Inventor 黄铭崇
Owner REALTEK SEMICON CORP
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