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

Linearization of a Single Power Amplifier in a Multiband Transmitter

A multi-band, transmitter technology, applied in the direction of improving amplifiers to reduce nonlinear distortion, amplifiers, components of amplifiers, etc., can solve problems such as signal energy overlap, achieve the effect of improving linearization performance and avoiding sampling rate

Inactive Publication Date: 2016-10-19
OPTIS CELLULAR TECH LLC
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the case of multiband transmission, the signal energies overlap after predistortion possible, making it impossible to resolve separately in the feedback path

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
  • Linearization of a Single Power Amplifier in a Multiband Transmitter
  • Linearization of a Single Power Amplifier in a Multiband Transmitter
  • Linearization of a Single Power Amplifier in a Multiband Transmitter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] Referring now to the drawings, there is shown an embodiment of a multiband transmitter 10 for linearizing the output of a power amplifier. The multiband transmitter 10 may include up to 3 modes of operation referred to herein as a high bandwidth mode, a low bandwidth mode, and a mixed bandwidth mode. In the high bandwidth mode, the multiband transmitter 10 predistorts each input signal individually before combining. In low bandwidth mode, the multiband transmitter 10 combines all the individual input signals before predistortion. In mixed bandwidth mode, the multiband transmitter 10 combines two or more input signals with overlapping bandwidths prior to predistortion, while non-overlapping input signals are predistorted individually.

[0025] figure 1 An example architecture of a multi-band transmitter 10 is illustrated having two modes of operation, a high bandwidth mode and a low bandwidth mode. The multiband transmitter 10 may be used in a base station or other wi...

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

A multiband signal is generated by combining two or more input signals separated in frequency. Depending on the bandwidth of the multiband signal, the input signals are combined before or after predistortion. If the bandwidth of the multiband signal is less than a predetermined bandwidth threshold, the input signals are combined and predistortion is applied to the combined signal to generate a multiband signal. If the bandwidth of the multiband signal is greater than a predetermined bandwidth threshold, the individual input signals are predistorted and the predistorted individual input signals are then combined to generate the multiband signal.

Description

technical field [0001] The present invention relates to power amplifiers for wireless transmitters in mobile communication networks, and more particularly to predistortion of input signals to multiband power amplifiers to compensate for non-linearities of the power amplifiers. Background technique [0002] A current trend in radio architectures for wireless transmitters in high data rate networks is to utilize dual-band power amplifiers to simultaneously transmit data on two different frequency bands. It is well known that power amplifiers are nonlinear devices. These nonlinearities can manifest as intermodulation products that fall within and outside the signal bandwidth. Depending on the severity of the nonlinearity, the distortion can result in spectral components that violate spectral limits established by the Federal Communications Commission (FCC) and other regulatory agencies. [0003] Typically, intermodulation products that fall at frequencies far from the center ...

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 Patents(China)
IPC IPC(8): H03F1/32H04B1/04
CPCH03F1/3247H03F1/3252H04B1/0475H04B2001/0425H03F1/3241
Inventor S·M·吉尔拉姆比J·B·莫里斯
Owner OPTIS CELLULAR TECH LLC
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