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Pre-distortion model device and signal pre-distortion processing device, system and method

A pre-distortion processing and model device technology, which is applied in the field of signal pre-distortion model devices, signal pre-distortion processing devices, and signal pre-distortion processing systems. Memory distortion and other issues

Active Publication Date: 2007-10-17
ZTE CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the existing digital pre-distortion technology is complex to implement, with large errors, high out-of-band emission of the output signal of the power amplifier, and cannot well calibrate the instantaneous distortion and memory distortion generated by the power amplifier.

Method used

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Embodiment Construction

[0104] The present invention will be further described in detail below through specific embodiments and accompanying drawings.

[0105] The present invention is applicable to all signal amplifying devices with nonlinear distortion, such as power amplifiers. The following embodiments take the application to the field of power amplifiers as an example to describe the present invention in detail.

[0106] The expression of the digital predistortion model to be realized by the present invention is as follows:

[0107]

[0108] In the expression (1), preD(l) is the predistortion parameter at the lth moment; Y(l) is the model of the power amplifier, where:

[0109] Y(l)=f 0 (|X(l-d 0 )|)·X(l-d 0 )

[0110] + f 1 (|X(l-d 1 )|)·X(l-d 1 )

[0111] + f 2 (|X(l-d 2 )|)·X(l-d 2 )

[0112] +…

[0113] + f m (|X(l-d m )|)·X(l-d m )(2)

[0114] In expression (2), f 0 (|X(l-d 0 )|), f 1 (|X(l-d 1 )|)..., f m (|X(l-d m )|) is a function of the inpu...

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Abstract

The invention discloses a pre-distortion model device, a signal pre-distortion treatment apparatus, a signal pre-distortion processing system, and a method for pre-distortion treatment of signal by utilizing the pre-distortion model device. Only one pre-distortion parameter should be exported by the pre-distortion model that the invention realized, and can cascade the complex multiplier, and can calibrate memory distortion and transient distortion of signal amplification equipment simultaneously. By using the invention, nonlinear model of the signal amplification equipment can not be extracted, which directly extract the pre-distortion model, thereby reducing the complexity of digital pre-distortion treatment, and can reduce the error.

Description

technical field [0001] The present invention relates to signal predistortion processing technology, in particular to a signal predistortion model device, a corresponding signal predistortion processing device, a signal predistortion processing system, and a signal predistortion processing method. Background technique [0002] At present, signal amplifying devices are widely used in various electronic fields, among which power amplifiers are more widely used. A power amplifier is referred to as a power amplifier for short. Because its signal has nonlinear distortion, it needs to be linearized. Currently, the commonly used linearization technology includes feedforward technology and pre-distortion technology. [0003] Feedforward technology is a relatively mature and effective power amplifier linearization technology, but its disadvantage is that the power amplifier is used to amplify the error signal to offset the out-of-band emission generated by the power amplifier of the m...

Claims

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Application Information

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IPC IPC(8): H04L25/49
Inventor 郭天生孙波戴征坚
Owner ZTE CORP
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