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Predistortion model apparatus as well as apparatus, system and method for processing predistortion of signal

A technology of pre-distortion processing and model device, applied in synchronization/start-stop system, improving amplifier to reduce nonlinear distortion, power amplifier, etc. Complicated issues

Active Publication Date: 2008-12-24
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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  • Predistortion model apparatus as well as apparatus, system and method for processing predistortion of signal
  • Predistortion model apparatus as well as apparatus, system and method for processing predistortion of signal
  • Predistortion model apparatus as well as apparatus, system and method for processing predistortion of signal

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Embodiment Construction

[0097] The present invention will be further described in detail below through specific embodiments and accompanying drawings.

[0098] 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.

[0099] The expression of the digital predistortion model to be realized by the present invention is as follows:

[0100] preD(l)=f 00 (·)+

[0101] f 11 (·)|X(l-1)| 2 +f 12 (·)|X(l-1)| 4 +…+f 1k (·)|X(l-1)| 2k +

[0102] f 21 (·)|X(l-2)| 2 +f 22 (·)|X(l-2)| 4 +…+f 2k (·)|X(l-2)| 2k + (1)

[0103] f 31 (·)|X(l-3)| 2 +f 32 (·)|X(l-3)| 4 +…+f 3k (·)|X(l-3)| 2k +

[0104]  …

[0105] f m1 (·)|X(l-m)| 2 +f m2 (·)|X(l-m)| 4 +…+f mk (·)|X(l-m)| 2k

[0106] In expression (1):

[0107] f 00 (·)=C 000 +C 001 |X(l)| 2 +C 002 |X(l)| 4 +…+C 00i |X(l)| 2i

[0...

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Abstract

The invention discloses a predistortion model device, a predistortion processing device for signals, a predistortion processing system for signals and a method for performing predistortion processing to the signals by using the predistortion model device. The predistortion model realized through the invention can only output a predistortion parameter, can use a complex multiplier for cascade connection and also can perform calibration to the transient distortion and the memory distortion of signal amplification device at the same time. By using the invention, the non-linear model of the signal amplification device is not required to be extracted, and the predistortion model is directly extracted, therefore, the complexity of digital predistortion processing can be reduced, and the error is also reduced.

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] Currently. Signal amplification equipment is 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 t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/49H03F1/32H03F3/20
Inventor 郭天生戴征坚苟春茂
Owner ZTE CORP
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