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

Method and apparatus for modulating radio signal using digital amplitude and phase control signals

A phase signal and digital technology, which is applied in the direction of digital transmission system, modulation carrier system, parts of amplification device, etc., to achieve the effect of life extension and high efficiency

Inactive Publication Date: 2005-08-10
PROVENANCE ASSET GRP LLC
View PDF0 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0023] The technology used in the system of Figure 1 has been around for nearly 40 years, but its application to the field of portable telecommunications has proven problematic, mainly due to the operating frequency of such devices

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 modulating radio signal using digital amplitude and phase control signals
  • Method and apparatus for modulating radio signal using digital amplitude and phase control signals
  • Method and apparatus for modulating radio signal using digital amplitude and phase control signals

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0049] In order to provide a full understanding of the invention, this application is accompanied by complete copies of the documents from which this invention claims priority. Said appendices shall be considered as an integral part of this application.

[0050] figure 2 A transmitter 300 according to an embodiment of the invention is shown. The transmitter has an input 310 for receiving a digital data stream representing the data to be transmitted. The data at said location has been encoded and formatted as necessary in accordance with the particular communication standard used for said transmission. For example, if the transmission is GSM, the speech should have been encoded in some way, error correction and detection bits have been added to the data, and the data from successive frames should have been interleaved. The same raw data intended to be transmitted in accordance with other communication standards, such as voice data, should have been processed in the manner re...

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 transmitter for modulating an RF carrier signal with an input digital data stream is disclosed. The transmitter has a processor for generating digital phase and digital amplitude signals which characterise the input digital data stream, a signal generator for generating an RF carrier signal with a phase property defined by the generated digital phase signal, an amplifier arranged to receive the RF carrier signal as an input, and a bi-level switching circuit responsive to the generated digital amplitude signal to switch between the two levels to generate a voltage signal for supplying power to the amplifier.

Description

technical field [0001] This invention relates to amplifiers. It is especially suitable for (but not limited to) power amplifiers in portable radiotelephones. Background technique [0002] Portable radiotelephones operate from a battery that is an integral part of the phone and has limited energy storage. Users of portable telephones are increasingly demanding longer operating times of the telephone between recharging cycles. [0003] In general, the single largest consumer of energy in a cellular phone is the transmitter, especially at the transmitter's power amplification (PA) stage. Not only does the PA need to operate at a higher power level than the rest of the phone, it must also transmit the required signals while operating in an essentially linear mode of operation to ensure its emissions comply with the defined standards applicable to said mode of operation. [0004] Typically, amplifiers operating in linear mode are not particularly efficient, so there must be a ...

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): H03F3/24H04L27/36
CPCH03F3/24H03F3/2173H04L27/361H03F1/0211
Inventor R·格兰格
Owner PROVENANCE ASSET GRP 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