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Power amplifier linearization method and linear power amplifier device

A power amplifier and linear power technology, applied in the field of signal processing, can solve the problems of unreliable work, complex structure and low accuracy, and achieve the effects of accurate and precise sampling and extraction, high detection sensitivity and good linearity

Inactive Publication Date: 2004-07-28
ZTE CORP
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Problems solved by technology

[0011] The invention provides a power amplifier linearization method and a linear power amplifier device to solve the problems of low precision, complex structure and unreliable operation in the prior art

Method used

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  • Power amplifier linearization method and linear power amplifier device
  • Power amplifier linearization method and linear power amplifier device
  • Power amplifier linearization method and linear power amplifier device

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Embodiment Construction

[0057] Below according to accompanying drawing and embodiment the present invention will be described in further detail:

[0058] according to Figure 8 and Figure 9 , the present invention includes a feedforward signal cancellation module 81 and a nonlinear distortion envelope spectrum negative feedback module 84, the nonlinear distortion envelope spectrum negative feedback module 84 obtains the nonlinear distortion signal envelope of the power amplifier by the feedforward signal cancellation module 81 The spectrum information is negatively fed back to the input channel of the power amplifier to superimpose the modulation envelope spectrum with the input signal.

[0059] The linearization method adopted in the present invention is: in this amplifying system including the feedforward signal cancellation loop, obtain the nonlinear distortion signal envelope spectrum information of the power amplifier from the feedforward signal cancellation loop, and utilize the negative feed...

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Abstract

The invention relates to a kind of linearization method of power amplifier in signal process field, the invention acquires the enveloped spectrum information of nonlinear distorted signal of power amplifier from front feedback signal counteraction loop, and feedbacks then to the input channel of power amplifier through degenerative feedback loop, and superimposes and modulates the enveloped spectrum, with the input signal, and forms the input signal pre-skewness, realizes the linear amplification of power amplifier. The device includes front feedback signal counteraction model, nonlinear skewness enveloped spectrum degenerative feedback model which is the enveloped spectrum information acquired from the front feedback signal counteraction model, and feedbacks it to the input channel of the power amplifier to be modulated into the enveloped spectrum.

Description

technical field [0001] The invention belongs to the field of signal processing, in particular to a linearization method and device for an amplifier. Background technique [0002] Due to the rapid expansion of the demand for linear power amplifiers in modern mobile communication systems, various linearization technologies and power amplifier linearization methods have been developed rapidly. Currently, the main linearization techniques and methods include three types: Feed-Forward, Predistortion and Envelop-Feedback. They respectively improve the linear index of the power amplifier from three angles. [0003] The ideal amplifier is to provide a completely transparent transmission channel for the RF carrier signal: for the input signal at any frequency point within the working frequency band, it can achieve a fixed ratio of amplitude amplification, stable phase offset and constant time delay in the full dynamic range , while not generating any other component signal componen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F1/20H04B7/005
Inventor 杨金鹏
Owner ZTE CORP
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