Method and device for double-module mobile terminal reducing radio frequency interference

A mobile terminal, radio frequency interference technology, applied in the direction of selection device, transmission control/equalization, electrical components, etc., can solve the problems of GSM receiving interference, CDMA influence, affecting the quality of GSM communication, etc., to optimize radio frequency performance and reduce interference Effect

Inactive Publication Date: 2008-04-02
ZTE CORP
View PDF0 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the mutual interference of GSM/CDMA dual-mode mobile terminals working simultaneously in the DCS frequency band (1710-1880MHz, referred to as the 1800M frequency band) and the PCS frequency band (1850-1990MHz, referred to as the 1900M frequency band) is an obvious problem. For the CDMA PCS frequency band network, the mobile terminals currently on the market have not taken any effective measures for this, but in the laboratory test, when the two frequency bands work at the same time, CDMA has a huge impact on GSM
[0003] For GC dual-mode mobile terminals that support CDMA

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 device for double-module mobile terminal reducing radio frequency interference

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] Figure 1 shows a device for reducing radio frequency interference when a GSM / CDMA dual-mode mobile terminal works simultaneously in the DCS and PCS frequency bands. The device includes a GSM module and a CDMA module, wherein the GSM module includes a GSM baseband circuit, a GSM radio frequency transceiver and a GSM radio frequency front end connected in sequence, and the CDMA module includes a CDMA baseband circuit, a CDMA radio frequency transmitting circuit / CDMA radio frequency receiving circuit connected in sequence The circuit and the duplexer, the CDMA radio frequency transmitting circuit and the CDMA radio frequency receiving circuit are connected in parallel with each other.

[0018] Described device also comprises an analog switch, and the control end of described analog switch is the control signal a that draws from GSM radio frequency front-end or GSM baseband circuit, two alternative path signals b1 and b2 of CDMA baseband circuit are used as two of analog swi...

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 present invention relates to a method for reducing the radio frequency interference in the double module mobile terminal, the GSM outputs an effective control signal when the GSM is working at the frequency period between 1800M to 1900M, otherwise, the control signal is ineffective; if the control signal is effective and the CDMA is working at the frequency of 1900M, the transmission power of the CDMA signal will be weaken; the invention also relates to a device for reducing the radio frequency interference in the double module mobile terminal, which includes a global mobile communication system GSM module and a code division multiple access CDMA module, and the device also includes an analogue switch, and the control end of the analogue switch leads out the control signal a from the front end of the GSM radio frequency or the GSM base band circuit, the access signals b1 and b2 of the CDMA base band circuit are inputted as the two inputs of the analogue switch, and the control signal inputs the strobe alternative access signal to the CDMA radio frequency transmitting circuit.

Description

technical field [0001] The present invention relates to a dual-mode mobile terminal, in particular to a method and a device for simultaneous operation of a GSM and CDMA dual-mode mobile terminal in a high frequency band (DCS and PCS frequency band). Background technique [0002] With the development of dual-mode mobile terminal users' needs, developers are faced with more and more technical challenges. Among them, the mutual interference of GSM / CDMA dual-mode mobile terminals working simultaneously in the DCS frequency band (1710-1880MHz, referred to as the 1800M frequency band) and the PCS frequency band (1850-1990MHz, referred to as the 1900M frequency band) is an obvious problem. For the network of the PCS frequency band of CDMA, the mobile terminals currently on the market have not taken any effective measures for this, but in the laboratory test, when the two frequency bands work at the same time, CDMA has a huge impact on GSM. [0003] For GC dual-mode mobile terminal...

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): H04B1/10H04B15/00H04Q7/32H04B7/005
Inventor 秦宇程守刚
Owner ZTE CORP
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