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Linear power amplification device with improved structure

A technology of linear and frequency conversion devices, applied in the direction of improving amplifiers to reduce nonlinear distortion, components of amplifiers, amplifiers, etc., can solve problems such as high cost, low detection accuracy, complex structure, etc., and achieve enhanced functions and good flexibility , the effect of reducing the amount of debugging

Inactive Publication Date: 2005-10-19
ZTE CORP
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Problems solved by technology

[0003] The object of the present invention is to provide a linear power amplifier device with improved structure with low cost, simple structure and high precision, so as to overcome the shortcomings of high cost, low detection precision and complex structure in the prior art

Method used

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  • Linear power amplification device with improved structure
  • Linear power amplification device with improved structure
  • Linear power amplification device with improved structure

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Embodiment Construction

[0012] Existing linear power amplifiers with pilot frequency feedforward such as figure 1 As shown, two loops of the feedforward circuit are composed of the excitation amplifier 101, the technical stage amplifier 102, the error amplifier 105, and the vector modulator 104; the control interface 103, the pilot tone generator 106, and the pilot tone receiver 107 etc. form an adaptive feedforward control system. The highly linear radio frequency signal is output from the transceiver to the input of the linear power amplifier, and is divided into two paths by a power divider. One path is used as the main path signal, and is amplified by the excitation amplifier 101 and the final stage amplifier 102 . Due to the influence of the nonlinearity of the power amplifier circuit, the output signal produces spectrum diffusion, and a small part of the signal is coupled out by the coupler and sent to the carrier frequency cancellation circuit, and most of the signal is delayed by the delay l...

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Abstract

The present invention has opened and linear power amplification unit with improved structure belonging to communication field to the public, which includes exciting amplifier, final stage amplifier, error amplifier, vector modulator, control interface, spectrum diffusion counterbalance detecting unit and carrier frequency counterbalance detecting unit. The spectrum diffusion counterbalance detecting unit receives RF output signal and to send the signal into the vector modulator. The carrier frequency counterbalance detecting unit receives the signal of vector modulator and to send it back to the vector modulator after having been processed in order to obtain a linear power amplificatino unit with low cost, simple structure and higher accuracy.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to a linear power amplifier. Background technique [0002] Due to the development of digital mobile communication technology, especially the development of CDMA and the third generation mobile communication technology (ie 3G), new requirements are put forward for the linear power amplifier index. In a CDMA or 3G system, even if it is a single carrier frequency, a linear power amplifier device is required, otherwise the spectrum spread produced by it cannot meet the requirements of the Spectrum emission mask required by the specification. In the linearization technology of the power amplifier, including the most commonly used digital predistortion or feed-forward technology, the spectrum dispersion of the power amplifier must be known first, that is, the amplitude and phase information of the spectrum diffusion component must be obtained first, and then linearized. The general me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03F1/00H03F1/32
Inventor 杜承法赵建平陈尚文何肃平甘志强
Owner ZTE CORP
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