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High linearity LINC transmitter

A transmitter, high linearity technology, applied in electrical components, transmission systems, etc., can solve problems such as two-way amplitude and phase imbalance

Inactive Publication Date: 2009-09-23
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] The problem to be solved by the embodiments of the present invention is to provide a new adaptive correction structure and adaptive correction algorithm, aiming at solving the imbalance problem of the two-way amplitude and phase in the LINC transmission system

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Embodiment Construction

[0020] The invention provides a correction structure and correction algorithm for amplitude and phase imbalance in a LINC system. The method aims to solve the problem of two-way mismatch in the LINC system and improve the linearity of the LINC system. In order to make the technical solution of the present invention clearer, examples are given below for detailed description.

[0021] The present invention relates to a highly linear LINC transmitter, more specifically, by simplifying the LINC double-branch unbalanced model, a new unbalance correction structure and correction algorithm are proposed, and the correction structure includes two parts: For the differential mode gain correction module and the differential mode phase correction module, each correction module sets different optimization goals and uses different adaptive algorithms for correction to improve the linearity of the system.

[0022] refer to figure 2 , the high-efficiency LINC transmitter of an embodiment of...

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Abstract

The invention provides a high linearity LINC transmitter. The LINC transmitter comprises a digital signal processing unit which is used for accomplishing the separation calculation of baseband signals and the self-adapting rectification calculation of feedback signals, an analog signal processing unit which is used for converting the digital baseband signals into analog baseband signals and transmitting the analog baseband signals into an emission and frequency carrying part by quadrature modulation, an amplifying unit which is used for accomplishing the amplification of power of radio-frequency signals, a synthesis unit which is used for synthesizing and outputting the two channels of signals, and a feedback unit which is used for accomplishing the operation of collecting the radio-frequency signals, generating intermediate frequency signals by down-conversion and transmitting the intermediate frequency signals into a baseband so as to calibrate the imbalance of amplitude and phase positions in a system.

Description

technical field [0001] The technology relates to the technical field of wireless communication, in particular to a LINC transmitter structure optimized in the field of wireless communication. Background technique [0002] General wireless communication transmitters cannot meet the requirements of high efficiency and high linearity at the same time. Usually designers either achieve high efficiency or high linearity alone. These transmitters, which cannot take both efficiency and linearity into account, cannot adapt to the development of modern communication technology. With the rapid development of digital signal processing technology, linear amplification using nonlinear device technology - LINC (Linear amplification with Nonlinear Components) has begun to attract the attention of researchers. This technology can enable the transmitter to obtain high efficiency and high linearity at the same time. The traditional LINC transmitter block diagram is shown in figure 1 shown. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/04
Inventor 何松柏李红宝尹世荣游飞
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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