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Method and device for processing digital pre-distortion

A technology of digital pre-distortion and processing methods, which is applied in the direction of improving amplifiers to reduce nonlinear distortion, etc. It can solve the problems of high hardware platform requirements and high hardware costs, and achieve the effects of reducing the number of calculations, saving computing resources, and improving computing efficiency.

Active Publication Date: 2009-12-30
TD TECH COMM TECH LTD
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Problems solved by technology

The corresponding hardware costs are high, and the requirements for the hardware platform are high.

Method used

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  • Method and device for processing digital pre-distortion
  • Method and device for processing digital pre-distortion
  • Method and device for processing digital pre-distortion

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Embodiment Construction

[0146] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples.

[0147] In the embodiment of the present invention, the DPD algorithm is improved, and the matrix F is generated according to the characteristic polynomial matrix U(n) and the upper triangular matrix W, and the matrix F is used H The operation of the two characteristics of F can reduce the calculation and obtain the matrix F H The complexity of F reduces the resources required for computation and storage space requirements.

[0148] The present invention mainly lies in reducing calculation and storage matrix F H The system resources required by F are described in detail below. Other procedures for obtaining predistortion coefficients are the same as those in the prior art, and will not be repeated here.

[0149] Skills and ordinary skilled person thro...

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Abstract

The invention discloses a method and a device for processing digital pre-distortion. The method comprises the following steps: according to output signals of a radio-frequency power amplifier and a pre-distortion coefficient intermediate transformation matrix acquired by calculation, acquiring elements of previous M rows of a pre-distortion coefficient second matrix in turn, initializing a pre-distortion coefficient third matrix, and acquiring elements of previous K rows above a diagonal in the pre-distortion coefficient third matrix according to the elements of the previous M rows of the pre-distortion coefficient second matrix; acquiring elements of other rows except the previous K rows above the diagonal in the pre-distortion coefficient third matrix according to a second property formula, and acquiring the elements under the diagonal in the pre-distortion coefficient third matrix according to a first property formula; and carrying out Cholesky decomposition for the pre-distortion coefficient third matrix to acquire a pre-distortion coefficient matrix, and carrying out pre-distortion processing for input signals. The method and the device greatly reduce the computing times, complexity and required storage space of the pre-distortion coefficient third matrix, save computing resources, and improve the computing efficiency.

Description

technical field [0001] The present invention relates to a pre-distortion (Pre-Distorter) technology, in particular to a digital pre-distortion (DPD, Digital Pre-Distorter) processing method and device. Background technique [0002] In electronic circuits, the nonlinear distortion of the RF power amplifier (PA, Power Amplifier) ​​will cause it to amplify the input signal while generating new frequency (harmonic) components, which will interfere with the transmitted signal or other channel signals. In order to improve the nonlinear distortion of the PA, the prior art generally adopts the DPD technology. The DPD technology adds a nonlinear network to the PA front-end to pre-distort the signal originally input to the PA, and then input the pre-distorted signal to the PA. The design of the nonlinear network needs to meet: the signal passing through the nonlinear network and PA can be linearly amplified. That is: the nonlinear distortion of the nonlinear network really makes up ...

Claims

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Application Information

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IPC IPC(8): H03F1/32
Inventor 熊冰魏立梅朱慧佟学俭
Owner TD TECH COMM TECH LTD
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