Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method and device for estimating DPD coefficients

A technology of coefficients and sub-coefficients, which is applied in the field of estimating DPD coefficients, can solve the problems of reducing communication quality, adjusting DPD coefficients, calculating autocorrelation matrix and cocorrelation matrix R_uz with high complexity, and achieving the effect of increasing speed and reducing complexity

Active Publication Date: 2014-03-05
COMBA TELECOM SYST CHINA LTD
View PDF4 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0026] Embodiments of the present invention provide a method and device for estimating DPD coefficients, which are used to solve the difficulty in calculating the autocorrelation matrix R_uu and the co-correlation matrix R_uz encountered in the process of calculating the digital predistortion coefficient in the prior art due to the high complexity. When the signal power or signal shape changes greatly, adjust the DPD coefficient in time, so that the amplification of the signal power by the power amplifier is nonlinear, thereby reducing the problem of communication quality

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method and device for estimating DPD coefficients
  • Method and device for estimating DPD coefficients
  • Method and device for estimating DPD coefficients

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0057] In order to provide an implementation plan for adjusting DPD coefficients in time, an embodiment of the present invention provides a method and device for estimating DPD coefficients, which are used to simplify the calculation of the autocorrelation matrix R_uu in the DPD coefficient calculation process, so that DPD performance is less affected. When the value is small, the estimation of the DPD coefficients can be quickly updated, thereby solving the problem in the prior art that the communication quality is degraded due to the slow update speed of the DPD coefficients.

[0058] Preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0059] refer to figure 2 As shown, in the embodiment of the present invention, the baseband signal x(n) is input into the digital predistorter to obtain the input data z(n) before the power amplifier, and the input data z(n) is sent to the power amplifier, and the f...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method and device for estimating DPD coefficients. The method and device are used for solving the problem that the DPD coefficients are extremely slow in update speed. The method comprises the steps that a first coefficient matrix and a first forward matrix are calculated; the first coefficient matrix and the first forward matrix are equally divided into sub coefficient matrixes and sub forward matrixes respectively according to set line numbers and the number of elements larger than or equal to a set threshold value in the first forward matrix and the number of elements larger than or equal to the set threshold value in each sub forward matrix are counted respectively; the peak value density of each sub forward matrix is calculated; according to the obtained peak value density, the corresponding sub forward matrixes are fused, so that a second forward matrix is obtained and the corresponding sub coefficient matrixes are fused, so that a second coefficient matrix is obtained; an autocorrelation matrix is calculated according to the second coefficient matrix, a cooperated correlation matrix is calculated according to the second coefficient matrix and the second forward matrix, and the DPD coefficients are estimated according to the autocorrelation matrix and the cooperated correlation matrix. The method for estimating the DPD coefficients is capable of improving the calculation efficiency of the DPD coefficients.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method and device for estimating DPD coefficients. Background technique [0002] The wireless communication system is entering 3G and moving towards 4G in an all-round way. The power amplifier is a key component that affects the system performance and coverage in the communication system. The two inherent characteristics of the power amplifier are nonlinearity and memory effect. These two inherent characteristics will cause The growth of the filtered signal spectrum causes certain interference to the adjacent channel, and also causes distortion of the in-band signal, which in turn increases the bit error rate of the system. [0003] Therefore, linearizing power amplifiers can greatly improve their power efficiency, which is crucial for the development of wireless communication systems. In the prior art, methods for performing linear processing on a power amplifier include fee...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/49
Inventor 邓炳荣苏慧君
Owner COMBA TELECOM SYST CHINA LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com