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Method and device for alternation of master and standby display LUTs (Lookup Tables)

A technology of alternating work and look-up table, which is applied in radio transmission systems, power management, electrical components, etc., and can solve the problem of not introducing the alternating work of active and standby LUTs.

Active Publication Date: 2013-01-09
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to ensure that the DPD processing system is in a stable state before and after the LUT parameter update, it is necessary to set the main and backup LUTs. However, the existing technology does not introduce how the main and backup LUTs work alternately.

Method used

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  • Method and device for alternation of master and standby display LUTs (Lookup Tables)
  • Method and device for alternation of master and standby display LUTs (Lookup Tables)
  • Method and device for alternation of master and standby display LUTs (Lookup Tables)

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Embodiment Construction

[0027] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0028] First, some technical points involved in the present invention will be explained.

[0029] The DPD parameters mentioned in the present invention can be expressed by the following mathematical formula:

[0030] LUT m ( | x ( n - m ) | ) = X q = 1 Q w m , q | x ( n - m ) | ( q - 1 ) , m = 1 . . . M , n = 1 . . . N...

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Abstract

The invention provides a method for alternation of master and standby display LUTs (Lookup Tables), which is applicable to the condition that memory factors at each level all correspond to a master LUT and a standby LUT, and all master LUTs and all standby LUTs use the amplitude of an input signal as an index to store DPD (Digital Pre-Distortion) parameters. The method comprises the following steps of: S1: carrying out DPD on input signals by using DPD parameters stored by all master LUTs, and updating DPD parameters stored by all standby LUTs; and S2: after the DPD parameters stored by all standby LUTs are updated, carrying out DPD on the input signals by using the DPD parameters stored by all standby LUTs and updating the DPD parameters stored by all master LUTs, and returning to the step S1 after the DPD parameters stored by all master LUTs are updated. The invention also provides a device for alternation of master and standby display LUTs. The invention realizes alternation of master and standby display LUTs.

Description

Technical field [0001] The present invention relates to a digital pre-distortion (DPD, Digital Pre-Distortion) processing technology, in particular to a technology in which the main and standby display look-up tables (LUT, Look-Up-Table) alternately work. Background technique [0002] At present, people have launched a lot of discussion and introduction to the theoretical algorithm of DPD. Most of the existing DPD theoretical algorithms are based on memory polynomials, and the mathematical model for DPD processing of input signals is as follows: [0003] z ( n ) = X m = 0 M x ( n - m ) X q = 1 Q w m , q | x ( n - m ) | ( q - 1 ) [0004] = X m = 0 M x ( n - m ) · LUT m ( | x ( n - m ) | ) [0005] LUT m ( | x ( n - m ) | ) = X q = 1 Q w m , q | x ( ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W52/00H04B7/00
Inventor 熊军肖鹏
Owner DATANG MOBILE COMM EQUIP CO LTD