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Enhancement type analog predistortion linear power amplifier

A power amplifier and predistortion technology, applied in power amplifiers, high-frequency amplifiers, improving amplifiers to improve efficiency, etc., can solve problems such as difficulty in applying repeater systems, and achieve the effect of improving overall efficiency and improving ACPR

Inactive Publication Date: 2009-10-28
FUJIAN SUNNADA TECH CO LTD
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AI Technical Summary

Problems solved by technology

The digital baseband predistortion method has a significant effect on improving the linearity of the power amplifier, but it is not easy to apply to the repeater system where the input and output signals of the power amplifier are all radio frequency signals

Method used

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  • Enhancement type analog predistortion linear power amplifier
  • Enhancement type analog predistortion linear power amplifier
  • Enhancement type analog predistortion linear power amplifier

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Embodiment Construction

[0019] see figure 1 , the enhanced analog predistortion linearized power amplifier of the present invention comprehensively uses the existing feedforward and predistortion technologies. The enhanced analog predistortion linearized power amplifier of the present invention includes a signal branching unit 1, a first main power amplifier 2, a predistortion generating unit 3, a delay filter 4, an error power amplifier 5, a 3dB bridge 6, a control unit 7, and Receiver 8. Wherein the input end of the signal branching unit 1 is used as the port of the radio frequency input, the input end of the first main power amplifier 2 and the first input end of the predistortion generation unit 3 are respectively connected to the output end of the signal branching unit 1, the first main power amplifier The first output end of 2 is connected to the input end of delay filter 4, and the second output end of first main power amplifier 2 is connected to the second input end of predistortion generati...

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Abstract

An enhancement type analog predistortion linear power amplifier, including a signal splitter unit, a first main power amplifier, a predistortion generation unit, a delaying filter, a error power amplifier, a 3dB electric bridge, a control cell and a receiver, the input end of the signal splitter unit is a radio frequency input terminal port, the input end of the first main power amplifier and the first input end of the predistortion generation unit are respectively connected to the output end of the signal splitter unit, the first output end of the first main power amplifier is connected to the input end of the delaying filter, the second output end is connected to the second input end of the predistortion generation unit, the output end of the predistortion generation unit is connected to the input end of the error power amplifier, the control cell controls every device, the output ends of the delaying filter and the error power amplifier are connected to the input end of the 3dB electric bridge, and the output end of the 3dB electric bridge is a radio frequency output terminal port. The enhancement type analog predistortion linear power amplifier provided by the invention has the advantages of improved ACPR, self-adapting function, considerably improved integral efficiency of power amplifier, thereby totally meeting the applied request of engineering.

Description

【Technical field】 [0001] The invention relates to a linearized power amplifier, in particular to a linearized power amplifier in a WCDMA mobile communication base station and repeater system. 【Background technique】 [0002] In order to achieve higher data transmission rate and spectral efficiency, modern wireless communication systems widely adopt linear modulation technology, which improves the performance requirements of RF power amplifiers. Power amplifiers need to have high output power, efficiency and linearity over a wide frequency band. The power amplifier used in WCDMA mobile communication base station and repeater system should have high linearity to minimize the interference to adjacent channels. There are many methods to realize high-linearity power amplifiers, mainly including power back-off method, feedback method, feed-forward method, and pre-distortion method. The power back-off method is the simplest and most reliable linearization method, but it has disadv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F3/20H03F1/32H03F3/189H03F1/02
Inventor 吴雄宾林凯
Owner FUJIAN SUNNADA TECH CO LTD
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