Radio frequency power amplification system with function of adaptive digital predistortion linearization

A technology of digital pre-distortion and radio frequency power, which is applied in power amplifiers, high-frequency amplifiers, improved amplifiers to reduce nonlinear distortion, etc. It can solve problems such as numerical instability, improve linearity, ensure power efficiency, and signal distortion Reduced effect

Inactive Publication Date: 2015-07-08
河北惠峰网络科技发展有限公司
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Problems solved by technology

However, there are still many problems in the existing predistortion linearization technology, such as polynomial model and Volterra series model, which will produce numerical instability when estimating parameters, and do not provide a complete and optimized RF power amplifier as a whole. Adapting to Digital Pre-Distortion Solutions

Method used

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  • Radio frequency power amplification system with function of adaptive digital predistortion linearization
  • Radio frequency power amplification system with function of adaptive digital predistortion linearization
  • Radio frequency power amplification system with function of adaptive digital predistortion linearization

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Embodiment Construction

[0032] The core technical idea of ​​the predistortion technology is to insert a digital predistortion compensation module containing the inverse characteristic curve of the RF power amplifier at the input to pre-compensate the distortion caused by the nonlinear amplification of the RF power amplifier. figure 1 It is a schematic diagram of the principle of linearization through predistortion technology. Under the condition of large signal output, the output of the RF power amplifier is distorted and close to saturation. When a digital predistortion compensation module containing the inverse characteristic curve of the radio frequency power amplifier is inserted, the output of the digital predistortion compensation module produces distortion. However, after the distorted signal passes through the RF power amplifier, a linear amplification result of the original input signal is obtained.

[0033] figure 2 It is a block diagram of an embodiment of a radio frequency power amplificati...

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Abstract

The invention discloses a radio frequency power amplification system with a function of adaptive digital predistortion linearization. The system comprises a digital predestortion compensation module, a down-conversion module, an up-conversion module and a power amplifier. An input radio frequency signal is converted into a digital signal firstly through the down-conversion module, and after being subjected to predistortion compensation calculation by the digital predestortion compensation module, the digital signal enters the un-conversion module, and is reduced into the radio frequency signal and input in the power amplifier to realize amplifying output. Through the introduction of the digital predestortion compensation module, the function of adaptive digital predistortion linearization is achieved; therefore an available linear area in the radio frequency power amplification system can be expanded greatly, and the linearity is improved while the power efficiency is ensured, so that the degree of distortion of the signal is reduced to an acceptable range.

Description

Technical field [0001] The present invention relates to a radio frequency power amplification system, in particular to a radio frequency power amplification system that realizes an adaptive digital predistortion linearization function by setting a digital predistortion compensation module, and belongs to the technical field of wireless communication. Background technique [0002] In the wireless communication system, the energy consumption of the wireless communication base station and its supporting equipment accounts for about 80% of the total energy consumption. Among them, the radio frequency power amplifier (RF PA) is one of the most important energy-consuming devices. The power efficiency of the radio frequency power amplifier is generally 10-15%, which is a bottleneck in reducing the power consumption of communication equipment. Improving the power efficiency of the RF power amplifier is of great significance to the energy saving and environmental protection of wireless c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03F1/32H03F3/189H03F3/20
Inventor 钱骅关心沈漫源向卫东冯卫锋黄剑毅
Owner 河北惠峰网络科技发展有限公司
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