Pre-distortion processing method and system for radio frequency amplifier

A radio-frequency amplifier and pre-distortion processing technology, which is applied to high-frequency amplifiers, improved amplifiers to reduce nonlinear distortion, etc., can solve problems such as difficult implementation and complicated calculation process, and achieve simple structure, reduced mutual influence, and reduced Effect of Adjacent Frequency Spectral Gain

Active Publication Date: 2013-04-17
GUANGDONG PLANNING & DESIGNING INST OF TELECOMM
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Problems solved by technology

However, when using the pre-distortion method, the phase and amplitude of the input and output of the amplifier must be calculated separately, resulting in a more complicated calculation process and greater difficulty in implementation

Method used

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  • Pre-distortion processing method and system for radio frequency amplifier
  • Pre-distortion processing method and system for radio frequency amplifier
  • Pre-distortion processing method and system for radio frequency amplifier

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Embodiment Construction

[0030] see figure 1 , figure 1 It is a schematic flow chart of the radio frequency amplifier predistortion processing method of the present invention.

[0031] The radio frequency amplifier predistortion processing method comprises the following steps:

[0032] S101, constructing a neural network-like model of a radio frequency amplifier through a complex number-like neural network algorithm;

[0033] Wherein, the neural network-like model is composed of a complex power function, and the coefficients of each order of the complex power function correspond to the distortion coefficients of the harmonics of each order of the radio frequency amplifier;

[0034] S102, using the output and input of the radio frequency amplifier working in a nonlinear state as the learning samples of the neural network model, and obtaining the coefficients of each order of the complex power function by gradually approaching zero with the error gradient;

[0035] S103. Using the neural network-like...

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Abstract

The invention provides a pre-distortion processing method and system for a radio frequency amplifier. An artificial neutral network model of the radio frequency amplifier is constructed through a plural artificial neutral network algorithm, amplifier input / output data are used for training neutral networks, and identical and trained neutral networks are placed before the amplifier as pre-distortion functions. The neutral networks are simple in structure and provided with self-learning functions, so that adjacent channel spectrum gains can be reduced, the interaction degree of radio frequency communication can be reduced, the whole communication rate and the spectrum efficiency can be improved, and complicated operations can be avoided. The neutral networks are real-time through continuous learning; and after performances of the amplifier are changed due to changes of external reasons (the temperature, the voltage and the like), the neutral networks can perceive the performance change and perform self-correction. For input and output curve characters of the amplifier, plural power functions are used for constructing the artificial neutral network model, so that the learning convergence rate is quick, and effects are good.

Description

technical field [0001] The invention relates to the technical field of radio frequency amplifier predistortion processing, in particular to a radio frequency amplifier predistortion processing method and a radio frequency amplifier predistortion processing system. Background technique [0002] With the proposal of the wireless city concept, the development of wireless communication, and the popularization and application of communication technology, higher requirements are placed on spectrum utilization. [0003] For radio frequency equipment such as mobile phones, base stations, and wireless routers, the ideal input-output relationship should be linear. However, affected by the nonlinear performance of radio frequency devices (such as amplifiers, antennas, etc.), the output signal not only carries the original information, but also produces distortion and spectral gain in adjacent frequencies. Spectrum gain not only brings unnecessary radiation, but more importantly, it in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F1/32H03F3/189
Inventor 肖鸣王晖吴龙照吕锐陈运动郑建飞赖志坚
Owner GUANGDONG PLANNING & DESIGNING INST OF TELECOMM
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