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Power amplifier and signal processing method

A power amplifier and signal technology, which is applied in the direction of improving the amplifier to reduce nonlinear distortion, etc., can solve the problems of deterioration, signal distortion, carrier leakage linearity index, etc., and achieve the effect of reducing distortion and improving linearity index

Active Publication Date: 2011-07-06
HUAWEI TECH CO LTD
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Problems solved by technology

[0005] Embodiments of the present invention provide a power amplifier and a signal processing method to solve the problem of signal distortion caused by deterioration of the linearity index caused by carrier leakage of the power amplifier in the existing radio frequency signal transmitter

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  • Power amplifier and signal processing method

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Embodiment Construction

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0022] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0023] see in conjunction figure 1 and figure 2 , when the power amplifier transmits a radio frequency signal, the baseband signal is first separated into an amplitude signal and a phase signal, wherein the amplitude...

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Abstract

The embodiment of the invention discloses a power amplifier and a signal processing method, and relates to the field of mobile communication. The power amplifier comprises a pulse modulator, a level adjustor and an amplitude power amplifier. The embodiment of the invention also provides a signal processing method. The method is that: signals processed by at least one integrator and the signals subjected to quantitative processing in the pulse modulator are the signals obtained by respectively subtracting a level adjusting value from preset high and low level values in the pulse modulator; because the level adjusting value is obtained by dividing a saturation level value of the amplitude power amplifier by a level amplification factor, a saturation level generated by the amplitude power amplifier is generated; a carrier leakage phenomenon caused by the saturation level of the amplitude power amplifier in the conventional power amplifier used for transmitting radio-frequency signals is avoided; therefore, linear indexes such as an adjacent channel power ratio (ACPR) of the power amplifier are greatly improved; and the distortion of the signals is reduced.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to a power amplifier and a signal processing method. Background technique [0002] In mobile communication, traditional transmitters are usually superheterodyne, zero-IF and other structures, and generally use I / Q quadrature modulation to generate the required IF or baseband signal, and then transmit the signal after up-conversion. Since the peak value of the baseband signal is relatively large, in order to meet the linearity index of the transmitter, it is necessary to sacrifice efficiency to make the power amplifier work in a state of high power consumption. Therefore, the contradiction between the linearity and working efficiency of the traditional transmitter cannot be ignored. [0003] Power amplifiers used for radio frequency signal transmission usually use polar modulation (Polar Modulation) technology, which can meet high linearity and high efficiency indicators at the sa...

Claims

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Application Information

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IPC IPC(8): H03F1/32
Inventor 何松柏殷为民胡世飞游飞焦留彦张希坤韦前华
Owner HUAWEI TECH CO LTD
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