Non-linear characteristic modeling method of frequency hopping radio transmitter

A transmitter, nonlinear technology, applied in electrical components, transmission monitoring, transmission systems, etc., to achieve the effect of improving engineering implementation, optimizing model structure, and reducing complexity

Active Publication Date: 2017-08-29
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

Through actual measurement, it can be known that in this mode, the nonlinear distortion of the transmitter will change with the change of frequency, and the magnitude of the change does not have a monotonous relationship with the change of frequency, so it is difficult to use a mathematical expression similar to the Rapp model Formula to describe the nonlinear characteristics of the frequency hopping radio transmitter

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  • Non-linear characteristic modeling method of frequency hopping radio transmitter
  • Non-linear characteristic modeling method of frequency hopping radio transmitter
  • Non-linear characteristic modeling method of frequency hopping radio transmitter

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Embodiment Construction

[0039] Embodiments of the present invention are described below with reference to the accompanying drawings, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific examples, and various modifications and changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention.

[0040] refer to figure 1 , the method includes the following steps: collecting the non-linear characteristics of the frequency-hopping radio transmitter in the full operating frequency band through the test platform, adding the difference in the nonlinearity of the transmitter between different frequencies on the basis of the traditional amplitude index pre-distortion table, forming a composition comprising Different frequency...

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Abstract

The invention discloses a non-linear model extraction method of a frequency hopping radio transmitter based on a predistortion table. The method comprises the following steps: acquiring non-linear characteristics of the full-working frequency band of the frequency hopping radio transmitter through a testing platform, adding the non-linear difference of the transmitter between different frequencies on the basis of the traditional amplitude index predistortion table, thereby constructing an amplitude index predistoration table set containing different frequencies; compressing and optimizing the predistortion table set by use of the amplitude non-uniform quantitative technology and the frequency non-linear classification technology to generate a non-linear characteristic model of the comprehensive signal amplitude and the carrier frequency information, thereby realizing the full frequency band non-linear characteristic feature model of the frequency hopping radio transmitter.

Description

technical field [0001] The invention relates to the technical field of wireless communication transmitters, in particular to the linearization technology of transmitters. By modeling the nonlinear characteristics of the frequency hopping radio transmitter at different frequencies, the nonlinear distortion degree of the transmitter can be accurately described, and the model basis can be provided for linearization techniques such as transmitter pre-distortion correction. Background technique [0002] The nonlinear distortion of the frequency hopping radio transmitter is mainly caused by the nonlinear characteristics of the RF power amplifier. Mainly manifested as amplitude distortion and phase distortion of the signal: After the signal passes through the nonlinear power amplifier, the gain of the output signal amplitude changes with the input signal amplitude, and the phase change also changes with the input signal amplitude. Nonlinear distortion will not only lead to the com...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/391
CPCH04B17/3912
Inventor 陈章陈剑斌周强
Owner NAT UNIV OF DEFENSE TECH
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