Volterra digital pre-distortion parameter identification method based on support set correction approximate message passing

A digital predistortion, approximate message technology, applied in electrical digital data processing, special data processing applications, instruments, etc., can solve the problems affecting the parameter identification performance of the Volterra model, and achieve good method stability, good identification performance, and application range. wide effect

Pending Publication Date: 2019-11-15
QINGDAO UNIV
View PDF0 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the parameter identification of the Volterra digital predistorter, the inherent defects of the

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
  • Volterra digital pre-distortion parameter identification method based on support set correction approximate message passing
  • Volterra digital pre-distortion parameter identification method based on support set correction approximate message passing
  • Volterra digital pre-distortion parameter identification method based on support set correction approximate message passing

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0083] In order to explain the technical solutions of the present invention more clearly, the present invention will be further described below. Obviously, the following descriptions are only part of the embodiments of the present invention. For those of ordinary skill in the art, no creative work is required. Under the premise of obtaining other embodiments based on these embodiments, they all fall within the protection scope of the present invention.

[0084] Preset DPD model information

[0085] The block diagram of the communication transmission system used in the present invention is as follows figure 2 Shown. The power amplifier is a very critical component in the communication system, but the PA has memory nonlinear characteristics, and its memory nonlinear characteristics are usually described by AM-AM characteristics and AM-PM characteristics. AM-AM distortion mainly studies the amplitude of input signals and output signals. The nonlinear distortion characteristics of AM...

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 provides a Volterra digital pre-distortion parameter identification method based on support set correction approximate message passing. The Volterra digital pre-distortion parameter identification method comprises the following steps: S1, generating a Volterra measurement matrix according to DPD model information; s2, carrying out normalization processing of a measurement matrix; s3,correcting the threshold shrinkage function and setting target iteration times and target precision; s4, performing iterative computation on model coefficients and residual errors, and extracting a coefficient support set; and S5, carrying out support set correction processing to improve the AMP estimation precision. Experiments prove that the SSR-AMP method provided by the invention has good feasibility and effectiveness for parameter identification of the Volterra digital predistorter.

Description

technical field [0001] The invention relates to a method for identifying parameters of a power amplifier digital predistortion, in particular to a method for identifying parameters of a Voltera digital predistortion model by using an approximate information transfer algorithm, and belongs to the technical field of communication signal processing. Background technique [0002] power amplifier [0003] With the rapid development of wireless communication, wireless mobile communication system and related technologies are experiencing an era of rapid development. Many modern communication modulation methods, such as Orthogonal Frequency Division Multiplexing (OFDM) and Multiple-Input Multiple-Output (MIMO), have the characteristics of wide frequency band and high spectrum utilization efficiency. At the same time, higher requirements are placed on the linearity of the power amplifier (Power Amplifier, PA). [0004] The power amplifier is an essential key device in the wireless ...

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
IPC IPC(8): G06F17/50
Inventor 苗圃王者卜庆凯宋康于腾
Owner QINGDAO UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap