Method for eliminating nonlinear distortion

A nonlinear distortion and signal technology, applied in the direction of improving amplifiers to reduce nonlinear distortion, etc., can solve problems such as relying on predefined distortion models, and achieve the effect of eliminating nonlinear distortion

Inactive Publication Date: 2013-03-27
BEIJING UNIV OF POSTS & TELECOMM
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  • Abstract
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Problems solved by technology

[0007] In order to overcome the problem that the existing distortion correction scheme relies too much on the predefined distortion model, the present invention adopts the adaptive fuzzy neural network to learn the nonlinear distortion function of the approximation signal

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Embodiment Construction

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0020] The specific embodiment of the present invention provides a signal nonlinear distortion elimination method and device, which are mainly used in the demodulator part in digital communication. attached figure 1 Shown is the block diagram of the device. It includes a signal sampler 1 , an adaptive fuzzy neural network correction module 2 , a constellation point recovery module 3 , a decision unit 4 and an expected signal generator 5 . In the learning phase, t...

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Abstract

The embodiment of the invention discloses a method for correcting the nonlinear distortion of a communication signal, relating to the field of wireless communication and being used for solving the signal distortion and the deformation of modulated constellation points caused by the nonlinear characteristic of a radio frequency power amplifying device. Through the adoption and the simplification of a self-adaptive fuzzy neural network, namely a tool which can be used for nonlinear function approximation, the method for eliminating the nonlinear distortion can enable the nonlinear characteristic of the radio frequency amplifying device to fully approximate and be compensated.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, aiming at signal nonlinear distortion during digital communication or distortion of quadrature modulation constellation points caused by the nonlinear characteristics of radio frequency power amplifier devices, and providing a device that can be widely applied to various radio frequency nonlinear characteristics signal distortion removal method. Background technique [0002] In wireless communication technology, especially in millimeter-wave communication technology, the main factor affecting communication performance is the signal distortion caused by the nonlinear characteristics of radio frequency devices, which eventually leads to a serious decrease in the signal-to-noise ratio of the received signal, and even makes a high-spectrum utilization Rate higher order modulation techniques cannot be used. On the other hand, OFDM technology, as a modulation technology with ext...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F1/32
Inventor 邹卫霞杜光龙
Owner BEIJING UNIV OF POSTS & TELECOMM
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