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Radio frequency power amplifier capable of cancelling distortion signals by adaptive feedback, and cancelling method

A technology of radio frequency power and distorted signals, applied in the field of communication, can solve problems such as power consumption, large heat dissipation area, and low efficiency, and achieve the effect of improving efficiency and linearity

Active Publication Date: 2018-08-10
沃勤科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of the traditional analog predistortion power amplifier is that the error amplifier itself does not contribute to the output power of the power amplifier, and the error amplifier itself has power consumption, resulting in relatively low efficiency of the traditional analog predistortion power amplifier. , the heat dissipation area of ​​the traditional analog predistortion power amplifier is relatively large, and the design and application costs are relatively high, so it lacks competitive advantages

Method used

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  • Radio frequency power amplifier capable of cancelling distortion signals by adaptive feedback, and cancelling method
  • Radio frequency power amplifier capable of cancelling distortion signals by adaptive feedback, and cancelling method
  • Radio frequency power amplifier capable of cancelling distortion signals by adaptive feedback, and cancelling method

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Embodiment 1

[0051] Combine below figure 1 , which specifically illustrates a structural schematic diagram of a radio frequency power amplifier with adaptive feedback to cancel aliasing signals of the present application;

[0052] Described radio frequency power amplifier comprises input power splitter A1, directional coupler A2, canceled radio frequency power amplifier A3, distorted main signal coupler A4, copy canceled amplifier output end matching circuit A5, output main signal and distorted signal coupler A6 , power divider A7, source signal amplifier B0, undistorted source signal delayer B1, signal combiner B2, distortion main signal AM phase modulator B3, main signal canceling coupler B4, distortion signal AM phase modulator B5, Distorted signal amplifier B6, digital processing unit C1, main signal cancellation detection unit C2, output main signal and distorted signal detection unit C3 and voltage and current detector C4;

[0053] After the input source signal passes through the in...

Embodiment 2

[0124] Based on the same inventive concept, the present embodiment provides an adaptive feedback cancellation method with a distorted signal of a radio frequency power amplifier. , so the implementation of the feedback cancellation method can refer to the implementation of the feedback cancellation radio frequency power amplifier, and the repetition will not be repeated.

[0125] The embodiment of the present application provides an adaptive feedback cancellation method for the distorted signal of the radio frequency power amplifier, wherein the digital processing unit C1 adjusts according to the information communicated by the external port and the data received by the internal I / O port, so that the main signal is canceled The cancellation of the distorted signal meets the requirements of the cancellation radio frequency power amplifier index; the method includes two parts: the control method of the main signal cancellation and the control method of the distortion signal cance...

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PUM

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Abstract

The invention discloses a radio frequency power amplifier capable of cancelling distortion signals by adaptive feedback, and a cancelling method, wherein the radio frequency power amplifier comprisesan input power divider A1, a directional coupler A2, a cancelled radio frequency power amplifier A3, a distortion main signal coupler A4, a signal canceling coupler A6, a power divider A7 and other devices. In the scheme provided by the invention, a cancelled radio frequency power amplifier output signal can be subjected to extraction of a main signal and a distortion signal through coupling, andthen, the radio frequency power amplifier output signal is combined with an input source signal, thus, the main signal is canceled, the kept distortion signal is coupled to a canceled amplification unit input end, after being amplified by the canceled amplification unit, amplitude of the distortion signal is equal to the amplitude of an own output end distortion signal, phase of the distortion signal is reverse to the phase of the own output end distortion signal, and after amplification, effects of cancelling and linearity improvement are realized at the output end of the cancelled amplification unit.

Description

technical field [0001] The present application relates to the field of communication technology, in particular to a radio frequency power amplifier and a cancellation method for adaptive feedback cancellation of false signals. Background technique [0002] In current wireless communication base station systems, power amplifiers with analog predistortion technology are still being used in some applications, such as traditional feedforward power amplifiers. The disadvantage of the traditional analog predistortion power amplifier is that the error amplifier itself does not contribute to the output power of the power amplifier, and the error amplifier itself has power consumption, resulting in relatively low efficiency of the traditional analog predistortion power amplifier. , the heat dissipation area of ​​the traditional analog predistortion power amplifier is relatively large, and the design and application costs are relatively high, so it lacks competitive advantages. Cont...

Claims

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Application Information

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IPC IPC(8): H03F1/02H03F1/32H03F1/56H03F3/195H03F3/213
CPCH03F1/0211H03F1/3247H03F1/56H03F3/195H03F3/213H03F2200/451
Inventor 孟庆南
Owner 沃勤科技有限公司