A pre-distorter and TD-SCDMA power amplification module using this predictive distorter

A predistorter and power amplifier module technology, applied in the field of power amplifier linearization equipment, can solve problems such as unreachable, wide output power dynamic range, nonlinear mismatch, etc., and achieve good linearity improvement, wide operating bandwidth, and wide frequency intermodulation. The effect of components

Inactive Publication Date: 2007-11-28
SHANGHAI TUYUE ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One is that the nonlinearity generated by the diode does not match the nonlinearity of the power amplifier; the other is that the nonlinearity of the diode is mainly the third-order intermodulation product, so that a wide dynamic range of output power cannot be achieved

Method used

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  • A pre-distorter and TD-SCDMA power amplification module using this predictive distorter
  • A pre-distorter and TD-SCDMA power amplification module using this predictive distorter
  • A pre-distorter and TD-SCDMA power amplification module using this predictive distorter

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0019] Fig. 2 shows the circuit of a preferred embodiment of the analog predistorter of the present invention. As shown in Figure 2, the predistorter includes a first divider 202, a first combiner 219, a first delay line connected on the first branch between the first divider 202 and the first combiner 219 204 , and a switch 205 , a loop 230 , a first attenuator 217 and a second phase shifter 218 connected in series on the second branch between the first divider 202 and the first combiner 219 in sequence. In the loop 230, a second divider 207, a second combiner 212, and a first nonlinear amplifier 209 connected in series on the first branch between the second divider 207 and the second combiner 212 are provided. , the second attenuator 210, the first phase shifter 211, and the third attenuator 213, the first linear amplifier 214 and second delay line ...

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Abstract

The invention discloses a predistorter and TD-SCDMA power amplifier mode of predistorter, which is characterized by the following: reaching broad frequency intermodulation component at non-linear generator, broad output dynamic tracing scale, broad working band and good heat tracing main-power amplifier path; setting two circuits in the predistorter with the first circuit generating non-linear component to cancel the carrier component and the second circuit generating entire predistortion signal with original carrier component and needed non-linear component; obtaining better linear modification with power amplifier; fitting for wireless launcher power amplifier linear equipment domain.

Description

technical field [0001] The invention relates to a power amplifier linearization device in the field of wireless transmitters, in particular to a predistorter and an analog predistortion power amplifier using the predistorter. Background technique [0002] At present, the third-generation mobile communication system is gradually rising in China, and digital TV and Wimax access are also becoming hot application fields. These fields all have linearization problems of wireless transmitters, the most important of which is the linearization of power amplifiers. The current linearization techniques include feedforward (FF), digital predistortion (DPD) and analog predistortion (APD). Feedforward technology is relatively mature and is currently the mainstream technology; digital predistortion technology is relatively difficult and only a few manufacturers have mastered it; these two technologies are relatively complicated, and the cancellation effect of spectrum regeneration compone...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/04
Inventor 杜承法
Owner SHANGHAI TUYUE ELECTRONICS CO LTD
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