Digital pre-distortion processing method and device for power amplifier

A power amplifier and digital pre-distortion technology, applied in the field of communication, can solve the problems of slow update of pre-distorter coefficients, high hardware requirements, increased system cost, etc., and achieve the effect of improving stability and computing efficiency

Active Publication Date: 2013-11-20
WUHAN POST & TELECOMM RES INST CO LTD
View PDF4 Cites 21 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The adaptive algorithm needs to process a large amount of data and perform multiple iterations, which makes the algorithm computationally intensive and time-consuming, the coefficients of the predistorter are updated slowly, the real-time performance is not high, and the ability to adapt to rapidly changing signals is not good. , it is difficult to achieve the best correction effect
[0010] 2. Due to the processing of a large number of source signals and feedback signals, the adaptive algorithm is

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
  • Digital pre-distortion processing method and device for power amplifier
  • Digital pre-distortion processing method and device for power amplifier
  • Digital pre-distortion processing method and device for power amplifier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0040] In order to make it easier for those skilled in the art to understand and implement the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0041] figure 1 It is a schematic diagram of a hardware structure for implementing the digital predistortion processing method of the present invention in an LTE digital intermediate frequency system.

[0042] Such as figure 1 As shown in , after the baseband unit 101 (BBU) undergoes a series of processing on the downlink input baseband signal, the frequency spectrum of the signal is moved to a digital intermediate frequency, and then sent to the IR interface module 107 through the optical fiber interface 106 . The IR interface module 107 completes the function of analyzing the IR interface protocol, and the analyzed data is first sent to the DUC module 108 for digital up-conversion and interpolation. Due to the high PAPR of OF...

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 relates to a digital pre-distortion processing method and device for a power amplifier. The digital pre-distortion processing device for the power amplifier comprises a pre-distortion module, a forward direction data collection module, a feedback data collection module, a microprocessor module and a control module. According to the digital pre-distortion processing method for the power amplifier, forward direction data entering the pre-distortion module and feedback data amplified by the power amplifier and fed back through a same data source channel after a peak subsides are collected; parameters of a memory polynomial in the pre-distortion module are computed in the RLS method based on the QR factorization; after coefficient computation is finished, the results are updated into the parameters of the memory polynomial in the pre-distortion module in a parallel mode; signals processed by a peak-subsiding module enter the pre-distortion module, memory polynomial computation is conducted, and pre-distortion processing of eliminating nonlinear effect of the power amplifier is conducted; circulating collection and iterative computations enable digital pre-distortion processing to be in a restrain state. Timeliness of a system is improved and resource consumption of the whole system is reduced on the whole, abnormal condition can be processed, and system stability is improved.

Description

technical field [0001] The invention relates to a data processing method and device in the communication field, in particular to a method and a device for realizing high-efficiency digital pre-distortion processing, and the invention belongs to the communication field. Background technique [0002] A power amplifier (PA) is a key component in a communication system that affects system performance, and nonlinearity is an inherent characteristic of a power amplifier. The nonlinearity of the PA will bring problems such as the increase of the bit error rate to the system. In order to reduce the impact of nonlinearity on system performance, generally make the PA work under a lower input working condition (or called fallback), that is, take the linear part of the PA working curve as the working range. However, for the current new transmission systems, such as Wideband Code Division Multiplexing (WCDMA), Orthogonal Frequency Division Multiplexing (OFDM), and Long Term Evolution (L...

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): H03F1/32
Inventor 王平辉王俊管鲍
Owner WUHAN POST & TELECOMM RES INST CO LTD
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