Unlock instant, AI-driven research and patent intelligence for your innovation.

Method and apparatus for double mode mobile phone

A technology of handheld devices and control devices, applied in wireless communication, transmission systems, electrical components, etc., which can solve the problems of expensive and complex repeated hardware components

Inactive Publication Date: 2005-08-10
UTSTARCOM INC
View PDF0 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This requires considerable duplication of hardware elements and is a costly and complex solution

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 double mode mobile phone
  • Method and apparatus for double mode mobile phone
  • Method and apparatus for double mode mobile phone

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0011] With reference to the accompanying drawings, the invention discloses a handheld device using a GSM hardware chipset. Such as figure 1 As shown, a single RF transmission system is employed in which a common antenna 10 and RF element 12 are interconnected to an analog front end (AFE) 14 . The AFE provides interfaces to handset peripherals such as a liquid crystal display (LCD), keypad, beeper, battery charger, speakers, microphone, camera and other standard equipment (generally collectively identified as 16). The single crystal oscillator 18 supplies a system clock as will be described in detail later. The digital baseband processing system 20 provides digital processing capabilities such as slew rate operation for transmit and receive operations, timing generation, equalization, etc. for GSM and PHS signal standards.

[0012] RF components in typical embodiments include low noise amplifiers (LNAs), mixers, amplifiers, RF signal generators and filters. The RF component...

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 dual mode mobile handset provides a single set of RF circuit elements which interface with a single set of analog circuit elements thereby reducing redundancy in the system. A DSP connected to the analog circuit elements modulates and demodulates both modes of transmission signals with software elements and pre and post processes the standard signals employing embedded softward. A single control CPU provides data to and receives data from the DSP for selected processing as the first standard transmission signal or the second standard transmission signal.

Description

technical field [0001] This invention relates generally to the field of mobile telephone handsets, and more particularly to mobile telephones employing a single set of RF, analog and other hardware elements with pre-processing and post-processing to implement two wireless communication standards. Background technique [0002] Mobile phones have been developed based on a variety of standards including both analog and digital communication capabilities. Most current cellular telephones are digital capable, however, various standards have proliferated for digital mobile telephone system technologies including GSM and CDMA. PHS technology for telecommunication systems is increasingly appearing in the market for major infrastructure development. However, to avoid carrying multiple mobile phones to also be able to communicate with current cellular phone standards, PHS users are required to have a single mobile handset that also includes standard cellular mobile communication tech...

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 Applications(China)
IPC IPC(8): H04B1/40H04W88/02
CPCH04W88/02
Inventor 刘海先余燕兵黄小庆高黎明
Owner UTSTARCOM INC