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Method and apparatus for protecting power amplifier in digital predistortion power amplifier system

A technology of digital pre-distortion and power amplifier system, which is applied in the direction of synchronization/start-stop system, improved amplifier to reduce nonlinear distortion, etc. It can solve problems such as no protection, large spurious, power amplifier damage, etc., and achieve the effect of increasing reliability

Inactive Publication Date: 2014-08-27
COMBA TELECOM SYST (GUANGZHOU) LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the digital predistortion power amplifier system in the initial power-on state, since each device contained in the digital predistortion power amplifier system will generate large spurs during the initial configuration, and the power amplifier has In the initial power-on state, the power amplifier may be damaged, but there is no method to protect the power amplifier in the digital pre-distortion power amplifier system when the digital pre-distortion power amplifier system is in the initial power-on state
[0004] To sum up, there is currently no method to protect the power amplifier in the digital pre-distortion power amplifier system when the digital pre-distortion power amplifier system is in the initial power-on state

Method used

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  • Method and apparatus for protecting power amplifier in digital predistortion power amplifier system
  • Method and apparatus for protecting power amplifier in digital predistortion power amplifier system
  • Method and apparatus for protecting power amplifier in digital predistortion power amplifier system

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Embodiment 1

[0063] Such as figure 2 As shown, the first detailed method of protecting the power amplifier in the digital predistortion power amplifier system when the digital predistortion power amplifier system is in the initial power-on state in the embodiment of the present invention includes:

[0064] Step 201. Turn off the path of the signal to be amplified input to the power amplifier through the first switch;

[0065] Such as Figure 4 As shown, the signal to be amplified is output from the digital-to-analog converter and the up-converter, and input to the power amplifier. An analog switch (the first switch) can be set between the digital-to-analog converter and the up-converter and the power amplifier. When the first switch is disconnected When the switch is turned on, the channel of the signal to be amplified input to the power amplifier is cut off through the first switch.

[0066] Step 202, each device in the digital predistortion power amplifier system is initialized and co...

Embodiment 2

[0075] Such as image 3 As shown, the first detailed method of protecting the power amplifier in the digital predistortion power amplifier system when the digital predistortion power amplifier system is in the working state in the embodiment of the present invention includes:

[0076] Step 301, connect the path of the signal to be amplified input to the power amplifier through the first switch, and configure the gain value of the baseband gainer to 0.8;

[0077] Preferably, the digital predistortion power amplifier system is in a normal working state after the first switch connects the path of the signal to be amplified input to the power amplifier and configures the gain value of the baseband gainer to 0.8.

[0078] Step 302: Determine the first peak power value corresponding to the signal obtained after the original signal input to the digital predistortion power amplifier system is processed by the first down-conversion and analog-to-digital converter, and determine the sig...

Embodiment 3

[0116] Such as Figure 5 As shown, the second detailed method of protecting the power amplifier in the digital predistortion power amplifier system when the digital predistortion power amplifier system is in the initial power-on state in the embodiment of the present invention includes:

[0117] Step 501: Turn off the path of the signal to be amplified input to the power amplifier through the first switch;

[0118] Step 502, shutting off the path of the original signal input to the digital predistortion power amplifier system through the second switch;

[0119] Wherein, step 501 and step 502 may be executed at the same time, step 501 may be executed first, and then step 502 may be executed, or step 502 may be executed first, and then step 501 may be executed.

[0120] Such as Figure 7 As shown, the signal to be amplified is output from the digital-to-analog converter and the up-converter, and input to the power amplifier, and an analog switch (the first switch) can be set b...

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Abstract

Embodiments of the present invention relate to the technical field of mobile communication, and especially relate to a method and apparatus for protecting a power amplifier in a digital predistortion power amplifier system. The method and apparatus are used for protecting the power amplifier in the digital predistortion power amplifier system when the digital predistortion power amplifier is in an initial power-up state. according to the embodiments of the invention, the method for protecting the power amplifier in the digital predistortion power amplifier system including: before initialization configuration is performed on devices in the digital predistortion power amplifier system, switching off a path of to-be-amplified signals input to a power amplifier through a first switch; and after the completion of the initialization configuration performed on the devices in the digital predistortion power amplifier system, switching on the path of the to-be-amplified signals input to the power amplifier through the first switch. According to the embodiments of the invention, the power amplifier in the digital predistortion power amplifier system is protected when the digital predistortion power amplifier system is in the initial power-up state.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to a method and device for protecting a power amplifier in a digital predistortion power amplifier system. Background technique [0002] The power amplifier plays an important role in the mobile communication system, and is mainly used to amplify the power of the input forward signal and then output it from the antenna. When the power amplifier is damaged, the mobile communication system will have no signal output, and the user equipment within the service area covered by the mobile communication system will not be able to communicate normally. Therefore, in current mobile communication systems including power amplifiers, methods and devices are used to protect the power amplifiers. [0003] In the digital predistortion power amplifier system including the power amplifier, there are many methods and devices for protecting the power amplifier, and the current methods an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/49H03F1/32
Inventor 张占胜潘栓龙
Owner COMBA TELECOM SYST (GUANGZHOU) LTD