Predistortion linearizer and application of the predistortion linearizer

A linearizer and predistortion technology, used in improving amplifiers to reduce nonlinear distortion, amplifiers, power amplifiers, etc., can solve the problem of not giving the circuit board selection principle, and achieve improved linearity, compared gain and phase. The effect of improved compression, simplified complexity
CN105897191AInactive Publication Date: 2016-08-24INST OF ELECTRONICS CHINESE ACAD OF SCI
7 Cites 9 Cited by

Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
INST OF ELECTRONICS CHINESE ACAD OF SCI
Publication Date
2016-08-24
Estimated Expiration
Not applicable Β· inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a predistortion linearizer. The predistortion linearizer comprises a first branch line coupler which is configured for inputting a signal by a first input end in a direction equal to an input signal, then directly outputting the signal by a first straight through end and outputting the signal from a first coupling end, wherein the signal output from the first coupling end has uniform amplitude with the signal output from the first straight through end, the direction of the signal output from the first coupling end is opposite to that of the signal output from the first straight through end. The predistortion linearizer also comprises a first nonlinearity generator which is configured for generating a curve of which amplitude and phase are extended at the same time and outputting a first way of signal; a second nonlinearity generator which is configured for generating the curve of which amplitude and phase are extended at the same time and outputting a second way of signal; and a power divider which is configured for synthesizing the first way of signal and the second way of signal and outputting the synthesized signal. Through application of the predistortion linearizer to linearity of a power amplifier, such as a travelling wave tube, the linearity can be improved greatly, and the predistortion linearizer has important engineering application value.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the field of power amplifiers, and further relates to a predistortion linearizer and a linearization method using the predistortion linearizer. Background technique

[0002] With the development of wireless and satellite communication technology, the non-constant envelope modulation technology with high spectrum utilization rate has been widely used, but it also makes the modulated signal have a higher peak-to-average ratio, which affects the important nonlinearity in the system. Device - the linearity of the power amplifier puts forward higher requirements. When a power amplifier such as a traveling wave tube works in a saturated state, the efficiency is high and it can output high power, but the linearity at this time is poor, which will cause very serious distortion of the modulated signal, and then cause the signal constellation to be deformed and distorted. Spectrum regrowth, causing intersymbol interference and adjacent ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More