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Ultra-wideband analog pre-distortion method and device

A pre-distortion, ultra-wideband technology, applied in the parts of the amplifier device, the balance device for modulation and transformation, and the improvement of the amplifier to reduce nonlinear distortion, etc. Improve nonlinear characteristics, improve linearity, and improve the effect of third-order intermodulation suppression

Pending Publication Date: 2018-09-04
CHENGDU SIWI POWER ELECTRONICS TECH
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  • Abstract
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Problems solved by technology

[0002] At present, analog pre-distortion circuits at home and abroad are limited by device bandwidth, and a single pre-distortion circuit can only be effective for a specific frequency and circuit complexity. The frequency band that can be effectively used is often narrow, and the basic use bandwidth is within 15%.
It is generally used in places with narrow working bandwidth such as the communication field, and each predistortion device can only be used for a specific power amplifier, which has poor versatility and generally needs to be customized
The general analog predistorter cannot satisfy the wideband power amplifier, so the wideband power amplifier generally adopts the method of power back-off to achieve better linearization characteristics, which requires the power amplifier to have higher output power and requires a large effort the price of

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Embodiment Construction

[0021] The specific embodiments of the present invention are described below so that those skilled in the art can understand the present invention, but it should be clear that the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the art, as long as various changes Within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions and creations using the concept of the present invention are included in the protection list.

[0022] Such as figure 1 and figure 2 As shown, the ultra-wideband analog predistortion device includes a first mixer and a second mixer, and the first mixer and the second mixer are respectively connected with a first frequency-sweeping local oscillator and a second frequency-sweeping local oscillator , the first mixer is connected with an active power divider, the power divider is connected with a pre-distortion generato...

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Abstract

The invention discloses an ultra-wideband analog pre-distortion method and device, which comprises a first frequency mixer and a second frequency mixer, wherein the two frequency mixers are respectively connected with a first frequency sweeping local oscillator and a second frequency sweeping local oscillator; the first frequency mixer is connected with a pre-distortion generator; the pre-distortion generator is connected with the second frequency mixer; and the second frequency mixer is connected with a power amplifier. The ultra-wideband analog pre-distortion method comprises a signal frequency conversion step, a pre-distortion signal generation step, a frequency reducing step and a signal counteracting step. According to the scheme, the frequency mixers and the frequency sweeping localoscillators are used for converting an input signal into a radio frequency signal with a fixed frequency; then, the analog pre-distorter is used for generating a pre-distortion signal; finally, the signal is converted to the input frequency through the frequency sweeping local oscillators and the frequency mixers, wherein a distortion signal opposite to the power amplifier is included in the signal at the moment, so that the distortion generated by the power amplifier itself can be counteracted after the signal passes through the power amplifier, and the purpose of improving the linearity of the power amplifier is achieved.

Description

technical field [0001] The invention relates to the field of power amplifiers, in particular to an ultra-wideband analog predistortion method and device. Background technique [0002] At present, analog predistortion circuits at home and abroad are limited by device bandwidth, a single predistortion circuit can only be effective for a specific frequency and circuit complexity, and the frequency band that can be effectively used is often narrow, and the basic use bandwidth is within 15%. It is generally used in places with a narrow working bandwidth such as the communication field, and each predistortion device can only be used for a specific power amplifier, which has poor versatility and generally needs to be customized. The general analog predistorter cannot satisfy the wideband power amplifier, so the wideband power amplifier generally adopts the method of power back-off to achieve better linearization characteristics, which requires the power amplifier to have higher out...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F1/32H03F3/189H03F3/20H03D7/14
CPCH03D7/14H03F1/3241H03F3/189H03F3/20H03F2200/451
Inventor 胡亮侯钧杨阳刘洋杜云飞
Owner CHENGDU SIWI POWER ELECTRONICS TECH
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