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Carrier balancing radio frequency predistortion power amplifier realizing apparatus and method

A radio frequency pre-distortion and pre-distortion technology, applied in the direction of improving the amplifier to reduce nonlinear distortion, synchronization/start-stop system, etc., can solve the problems of limited bandwidth and low degree of improvement, and achieve the best pre-distortion effect, obvious improvement effect, The effect of flexible adjustment

Active Publication Date: 2008-10-15
WUHAN HONGXIN TELECOMM TECH CO LTD
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Problems solved by technology

RF predistortion is currently achieved by using the nonlinearity of diodes to achieve predistortion. This method has a relatively limited bandwidth and a relatively low degree of improvement.

Method used

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  • Carrier balancing radio frequency predistortion power amplifier realizing apparatus and method
  • Carrier balancing radio frequency predistortion power amplifier realizing apparatus and method
  • Carrier balancing radio frequency predistortion power amplifier realizing apparatus and method

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Embodiment Construction

[0043] The specific implementation manner of the present invention will be described below in conjunction with the accompanying drawings.

[0044] Such as figure 1 As shown, the carrier cancellation RF predistortion power amplifier implementation device of an embodiment of the present invention includes a 3dB quadrature bridge 102, a gain amplifier 103, a 3dB quadrature bridge 104, a power amplifier 105, a distortion device, a variable gain amplifier 110, and a phase shifter 111; the 3dB quadrature bridge 102 is used to divide the radio frequency signal entering the device into two paths, one of which is output to the gain amplifier 103, and the other is output to the distortion device, the two paths of signals are equal in amplitude and 90 degrees out of phase; The gain amplifier 103 is used to amplify the received radio frequency signal to obtain the main link signal; the distorter is used to process the received radio frequency signal to obtain an error signal, and output t...

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Abstract

The invention relates to a device and a method for fulfilling carrier cancellation radiofrequency predistortion power amplification, which improves the traditional carrier cancellation method by extracting error signals, amplifying the error signals, adjusting the phase of the error signals, synthesizing the error signals and main signals, amplifying the power of the synthesis signals and flexibly adjusting the amplitude and phase of the error signals according to final results, thereby greatly reducing debugging difficulty and time and ensuring the optimal predistortion effect due to the fulfillment of the flexible adjustment of the amplitude and phase of the error signals.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a carrier cancellation radio frequency predistortion power amplifier implementation device and method. Background technique [0002] At present, mobile communication is developing rapidly in our country, the bandwidth of the signal is getting wider and higher, and the peak-to-average ratio is getting higher and higher. In order to improve the linearity and efficiency of the power amplifier, one is to select a suitable ultra-linear semiconductor device and design a high-performance radio frequency Transmitter, this method is costly and technically difficult; the second is to back off the power of the entire transmission channel to make the transmission channel work in the linear region, which greatly reduces the working efficiency of the system; the third is that there are currently Many linearization techniques for power amplifiers include feedforward method, feedb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/49H03F1/32
Inventor 刘广才
Owner WUHAN HONGXIN TELECOMM TECH CO LTD
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