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Digital predistortion device and method

A digital predistortion, digital technology, applied in the field of wireless communication

Active Publication Date: 2013-07-03
SHANGHAI FUDAN COMM
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

The invention solves the problem of predistortion in multi-channel single amplifier broadband digital wireless communication system

Method used

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  • Digital predistortion device and method
  • Digital predistortion device and method

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Embodiment Construction

[0026] The embodiments of the present invention are described in detail below. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following implementation example.

[0027] Such as figure 1 As shown, this embodiment includes: a delay filter array, a synchronous switch, a quadrature demodulator and an analog-to-digital converter connected in sequence, and a delay variable frequency array and a digital predistorter connected with the synchronous switch, wherein: the delay The input end of the filter array is connected with the output end of the power amplifier of the multi-channel single amplifier broadband digital line communication system, the input end of the digital predistorter receives the digital baseband signal after frequency conversion, and the output end of the digital...

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Abstract

The present invention relates to a digital predistortion device and a method, which are applied to a multichannel single amplifier broadband digital wireless communication system and belong to the technological field of wireless communication. The device includes a time-delay filtering array, a synchronization switch, a quadrature demodulator, an analog-to-digital converter, a time-delay frequency conversion array connected with the synchronization switch and a digital predistortion unit, wherein all the units are connected in order, the input end of the time-delay filtering array is connected with the output end of a power amplifier of the multichannel single amplifier broadband digital wireless communication system, the input end of the digital predistortion unit receives the frequency conversed digital baseband signal, and the output end of the digital predistortion unit outputs a digital carrier. The digital predistortion device and the method resolve the predistortion problem of a multichannel single amplifier broadband digital wireless communication system.

Description

technical field [0001] The present invention relates to a processing device and a method thereof in the field of wireless communication technology, in particular to a digital predistortion device and a method thereof for a multi-channel single-amplifier broadband digital line communication system. Background technique [0002] RF power amplifier PA (Power Amplifier) ​​is an important part of the wireless communication system. The main problem faced by RF power amplifiers is their nonlinear distortion characteristics, which cause a serious drop in system power utilization. To solve this problem, it is usually necessary to predistort the input of the RF amplifier. In digital communication systems, this kind of predistortion is also usually realized by means of digital signal processing. Hence it is called digital predistortion. [0003] Usually, the digital predistortion system determines the degree of distortion of the amplifier by comparing the difference between the outp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/49
Inventor 刘勃归琳彭彪刘思熊箭
Owner SHANGHAI FUDAN COMM
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