Method of processing radio frequency interference of dual-mode mobile terminal in adjacent frequency band

A mobile terminal, frequency band radio frequency technology, applied in wireless communication, transmission system, electrical components and other directions, can solve the problems of dropped calls, inability to treat differently, poor call effect of dual-mode mobile terminals, etc., to achieve the effect of optimizing radio frequency performance

Inactive Publication Date: 2008-03-12
ZTE CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, these processing methods cannot treat different frequency intervals differently, so that the RF performance of dual-mode mobile terminals is inhibited to a certain extent in all cases. Figure 2 shows the performance of such dual-mode mobile terminals. Changes in receiving sensitivity with frequency interval
Therefore, in the actual dual-call process, if the network coverage is not good, no matter what the frequency interval between the two systems is, the dual-mode mobile terminal will have poor call results or even frequent call drops.

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  • Method of processing radio frequency interference of dual-mode mobile terminal in adjacent frequency band
  • Method of processing radio frequency interference of dual-mode mobile terminal in adjacent frequency band
  • Method of processing radio frequency interference of dual-mode mobile terminal in adjacent frequency band

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Embodiment Construction

[0027] The specific embodiment of the technical solution of the method of the present invention is described in further detail below:

[0028] Please refer to Figure 1, which is a schematic diagram of the change of receiving sensitivity with the frequency interval of dual-mode mobile terminals when GSM and CDMA dual-mode mobile terminals do not use any measures. In the prior art, it is a schematic diagram of the change of receiving sensitivity with the frequency interval of the dual-mode mobile terminal.

[0029] For common GSM / CDMA (G / C) dual-mode mobile terminals, due to the overlap of frequency bands at 890MHz-894MHz, there is interference from GSM transmission to CDMA reception; there is overlap of frequency bands at 1850MHz-1880MHz, and there is interference from CDMA transmission to GSM reception. . If no technical measures are adopted, the transceiver performance of the mobile terminal will vary greatly with the difference between the GSM and CDMA operating frequency i...

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Abstract

The present invention discloses a method to process radio frequency interferences of duplex mobile terminals in adjacent bands, which comprises steps below: I. A RF controller is connected with a CDMA RF loop; II. It is necessary to confirm whether GSM mobile terminals and CDMA mobile terminals synchronously operate in an adjacent band and interference type is that transmitted by GSM mobile terminals and received by CDMA mobile terminals. And then, a transmission time slot control signal of the GSM mobile terminal switches off the RF controller. As the GSM mobile terminal and CDMA synchronously operate in the adjacent band and the interference type is that transmitted by the CDMA mobile terminal and received by the GSM mobile terminal, a receiving time slot control signal of the GSM mobile terminal switches off the RF controller. The present invention optimizes RF performance of adjacent frequencies.

Description

technical field [0001] The present invention relates to a dual-mode mobile terminal, in particular to a GSM (Global System for Mobile communication, Global System for Mobile Communications) and CDMA (Code Division Multiple Access, Code Division Multiple Access) dual-mode mobile terminal that realizes simultaneous normal operation in adjacent frequency bands How to deal with radio frequency interference. Background technique [0002] With the development of mobile communication terminal technology and market demand, various types of dual-mode mobile terminals have been successfully developed. Among them, GSM and CDMA dual-mode mobile terminals are currently the most widely used dual-mode mobile terminals. Because the commonly used physical channels of GSM and CDMA overlap in some frequency bands, radio frequency interference will be generated when the two work at the same time. If no processing measures are taken, then in this case, the performance of the whole machine will...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/707H04B1/40H04W88/06
Inventor 秦宇程守刚
Owner ZTE CORP
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