A TD-SCDMA/GSM single-antenna mobile telephone double-mode double-standby realizing method

A TD-SCDMA, dual-mode dual-standby technology, applied in the field of TD-SCDMA/GSM single-antenna mobile phone dual-mode dual-standby implementation, can solve the problems of third-party phone access, call interference, dropped calls, etc.

Inactive Publication Date: 2007-11-07
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The actual performance of the user end is that if the TD-SCDMA system transmits during a GSM900/DCS1800 call, the GSM900/DCS1800 ca

Method used

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  • A TD-SCDMA/GSM single-antenna mobile telephone double-mode double-standby realizing method
  • A TD-SCDMA/GSM single-antenna mobile telephone double-mode double-standby realizing method
  • A TD-SCDMA/GSM single-antenna mobile telephone double-mode double-standby realizing method

Examples

Experimental program
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Embodiment Construction

[0015] Under normal standby conditions, the TD-SCDMA module and the GSM module are in the state of radio frequency reception respectively without interfering with each other. When starting up, GSM first searches for the network, and TD-SCDMA searches for the network after the registration is successful. After successful registration, you can see the dual-network standby icon.

[0016] Fig. 1 is a schematic structural diagram of a TD-SCDMA / GSM dual-mode mobile phone in the first embodiment of the method of the present invention. The mobile phone includes an antenna 1 and a TD-SCDMA radio frequency module 2 and a GSM900 / DCS1800 radio frequency module 3 sharing the antenna. The TD-SCDMA radio frequency module 2 includes a TD-SCDMA transmitter and a TD-SCDMA receiver 201, and a GSM900 / DCS1800 radio frequency module 3 There is a GSM900 / DCS1800 transmitter and a GSM900 / DCS1800 receiver 301 . Install a high-pass filter 4 between the antenna and the TD-SCDMA radio frequency module, w...

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Abstract

A method for realizing double-mode standby of TD-SCDMA/GSM mobile phone with single antenna includes adding a low-pass filter between antenna and GSM 900/DCS1800 radio frequency module or adding a high-pass filter between antenna and TD-SCDMA radio frequency module or adding both filters simultaneously to suppress interference to each other of two systems for realizing double-mode double-standby function.

Description

technical field [0001] The invention relates to a method for realizing dual-mode dual-standby of a mobile terminal, in particular to a method for realizing dual-mode dual-standby of a TD-SCDMA / GSM900-1800 single-antenna mobile phone. Background technique [0002] At present, when dual-standby is implemented in a TD-SCDMA / GSM (TD-SCDMA: Time Division synchronous CDMA, Time Division Synchronous Code Division Multiple Access; GSM: Global System for Mobile, Global System for Mobile) dual-mode mobile phone, the following two types may occur: Interference: 1. The transmitted signals of TD-SCDMA and GSM may become the blocking interference of the opponent's receiver; 2. Since the power amplifier is wideband, the sideband noise generated by the TD-SCDMA and GSM transmitters on the receiving frequency band of the opponent may be submerged Useful signal, causing interference to the receiver. [0003] The working frequency band of GSM900 is uplink 880~915MHz, the peak maximum transmis...

Claims

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Application Information

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IPC IPC(8): H04Q7/32H04Q7/38H04B7/26H04B1/52H04B1/525H04W88/06
Inventor 仝雷黄河
Owner ZTE CORP
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