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Radio frequency feed-forward amplifier and loop self-adaptive control method

A technology of power amplifier and feedback power, applied in the field of mobile communication

Active Publication Date: 2014-03-26
COMBA TELECOM SYST CHINA LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on this, it is necessary to provide a radio frequency feed-forward power amplifier and a loop adaptive control method for the above-mentioned high linearity of the power amplifier.

Method used

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  • Radio frequency feed-forward amplifier and loop self-adaptive control method
  • Radio frequency feed-forward amplifier and loop self-adaptive control method
  • Radio frequency feed-forward amplifier and loop self-adaptive control method

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Such as figure 1 As shown, a radio frequency feedforward power amplifier includes a carrier cancellation loop 200, an intermodulation cancellation loop 300, and a chip controller 400. The amplitude modulator 201, the phase modulator 202, the first gain equalizer 203, the main power amplifier 204, the other input end of the main power amplifier 204 is coupled to the pilot signal input end 205, and the delay line coupled to the radio frequency signal input end 100 206, and a combiner 207 coupled to the delay line 206 and the output of the main power amplifier 204; the intermodulation cancellation loop 300 includes a phase adjustment circuit 310, a gain adjustment circuit 320, a second gain equalizer 330, an error Power amplifier 340, delay filter 350, receiver 360, described combiner 207 is connected with gain adjustment circuit 320, second gain equalizer 330, error power amplifier 340 input end successively through phase adjustment circuit 310, and described delay filter...

Embodiment 2

[0028] The main difference between the second embodiment and the first embodiment is that the radio frequency feedforward power amplifier also includes a loop real-time protection circuit.

[0029] Such as figure 1 , figure 2 As shown, a radio frequency feedforward power amplifier includes a carrier cancellation loop 200, an intermodulation cancellation loop 300, a chip controller 400, and a loop real-time protection circuit 370 located at the intermodulation cancellation loop 300 :

[0030] The carrier cancellation loop 200 includes an amplitude modulator 201, a phase modulator 202, a first gain equalizer 203, a main power amplifier 204 connected to the radio frequency signal input terminal 100 in turn, and the other input terminal of the main power amplifier 204 is connected with the pilot signal The input terminal 205 is coupled and connected, the delay line 206 coupled with the radio frequency signal input terminal 100, and the combiner 207 coupled with the delay line 2...

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Abstract

The invention discloses a radio frequency feed-forward amplifier and a loop self-adaptive control method. The radio frequency feed-forward amplifier comprises a carrier compensation loop, an inter-modulation compensation loop and a chip controller, wherein the carrier compensation loop comprises an amplitude modulator, a phase modulator, a first gain equalizer, a main power amplifier, a delay line and a combiner; the inter-modulation compensation loop comprises a phase regulating circuit, a gain regulating circuit, a second gain equalizer, an error power amplifier, a delay filter and a receiver; the chip controller is used for monitoring the feedback power of the carrier compensation loop and the inter-modulation compensation loop, and self-adaptively regulating the amplitude, phase position and pilot frequency of a corresponding loop. According to the radio frequency feed-forward amplifier and the loop self-adaptive control method, the chip controller is used for monitoring and controlling the two loops, so that the radio frequency feed-forward amplifier is enabled to obtain the optimal compensation effect, rate of convergence and dynamic stability, and the features such as linearity, bandwidth and mode mixing are enabled to be better.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to a radio frequency feedforward power amplifier and a loop adaptive control method. Background technique [0002] With the development of wireless mobile communication technology and network, domestic 3G network is under construction, and there is a trend of rapid development to 4G. The business is gradually shifting from data and voice to data download including data and voice, video and image services, and the network is developing towards IP (Internet Protocol) flattening. Therefore, the ever-increasing business demand also puts forward high requirements for wireless mobile communication equipment, and the power amplifier is the technical core of sending and receiving communication. high demands. [0003] The traditional power back-off method for designing HPA (high power amplifier) ​​is to back off the input power of the power amplifier by 6-10 dB from the 1dB (decibel) co...

Claims

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Application Information

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IPC IPC(8): H03G3/20H03F1/32
Inventor 李合理张世杰黄健安
Owner COMBA TELECOM SYST CHINA LTD
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