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

Method and apparatus for transmitting signal digital predistortion, frequency characteristic compensation and feed forward linearization

A technology of frequency characteristics and pre-distortion, applied in the field of linearization, can solve problems such as unsatisfactory satisfaction

Inactive Publication Date: 2002-10-16
NOKIA SOLUTIONS & NETWORKS GMBH ＆ CO KG
View PDF0 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The known methods described above do not satisfy these requirements satisfactorily

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 apparatus for transmitting signal digital predistortion, frequency characteristic compensation and feed forward linearization
  • Method and apparatus for transmitting signal digital predistortion, frequency characteristic compensation and feed forward linearization
  • Method and apparatus for transmitting signal digital predistortion, frequency characteristic compensation and feed forward linearization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] The components shown in Figure 1 include, on the upper side, a first signal processing chain for generating predistortion and frequency characteristic compensation signals, and on the lower side, a second signal processing chain for generating a reference signal . As will be explained below, the first and second signal processing chains are coupled to each other so as to form a correction loop for linearizing the digital signal.

[0019] In Fig. 1, the generation of the analog pre-distortion and frequency characteristic compensation signal entering through the first input line 1 and the generation of the analog reference signal entering through the second input line 2 will be combined later below figure 2 with image 3 Elaborate.

[0020] In the first signal processing chain shown on the upper side of FIG. 1 , the analog predistorted and frequency-characteristically compensated signal entering via the first connecting line 1 reaches the nonlinear main amplifier 3 and ...

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

In order to linearize the digital signal, two different signals are fed into the correction loop of the feedforward amplifier. One of the signals (the main signal) is pre-distorted and frequency-characteristically compensated before it is sent to the nonlinear amplifier (3). The second signal remains undistorted and is used as a reference signal, which is used to cancel out the main signal portion. These two signals are fed into a correction loop for a highly linearized output signal.

Description

technical field [0001] The invention relates to a method for the linearization of a digitally generated transmitted signal with combined digital predistortion and frequency response compensation linearization as well as feedforward linearization (forward correction linearization). [0002] Furthermore, the invention relates to several devices by which the method of the invention can be carried out. Background technique [0003] Known modulation methods with an amplitude modulation component generate interfering signal components on non-linear components of the transmit signal, such as spectral broadening of the transmit signal frequency and increase of the error signal. [0004] Kerington (Kerington) by P.B., published by Artech Press, book number ISBN 1-58053-143-1 "Highly Linear RF Amplifier Design" is known, for example, for the method of digital signal linearization, especially as A digital signal that appears in the transmitter of a digital mobile radio station. These...

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
CPCH03F1/3235H03F1/3282H03F1/3294
Inventor T·菲尔根特雷夫
Owner NOKIA SOLUTIONS & NETWORKS GMBH ＆ CO KG
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