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Mobile terminal and method for implementing double-mode and double-standby

A mobile terminal and dual-standby technology, applied in the field of communication, can solve problems such as dropped calls, third-party phone inaccessibility, and call interference, etc., and achieve the effect of reducing structural difficulty and cost

Inactive Publication Date: 2008-07-16
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 call will be interfered or dropped, or the third-party phone of the GSM900 / DCS1800 cannot be connected during a normal TD-SCDMA call.

Method used

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  • Mobile terminal and method for implementing double-mode and double-standby
  • Mobile terminal and method for implementing double-mode and double-standby
  • Mobile terminal and method for implementing double-mode and double-standby

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Embodiment Construction

[0021] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0022] The main idea of ​​the present invention is to install a low-pass filter between the antenna and the GSM900 / DCS1800, and the low-pass filter can attenuate the TD-SCDMA frequency band signal to 40dB. In this way, the blocking signal generated by TD-SCDMA to GSM900 / DCS1800 has been effectively suppressed; at the same time, the sideband interference generated by GSM900 / DCS1800 in the TD-SCDMA frequency band has also been effectively suppressed.

[0023] A high-pass filter is installed between the antenna and TD-SCDMA, and the attenuation of the high-pass filter to the GSM900 / DCS1800 frequency band signal reaches 40dB. In this way, the blocking signal generated b...

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Abstract

The invention provides a mobile terminal which is used to realize the dual mode and the dual stand-by of the TD-SCDMA and the GSM and a method thereof; the method includes step S402, step S404 and step S406, wherein the step S402 is that an antenna is arranged for receiving radio frequency signals; the step S404 is that a first wave filter is arranged between the antenna and a GSM radio frequency unit for attenuating signals of the TD-SCDMA frequency band; and the step S406 is that a second wave filter is arranged between the antenna and a TD-SCDMA radio frequency unit for attenuating signals of the GSM frequency band; thus, the invention has the advantages of resolving the problem of the mutual interference of two systems and realizing the dual mode and the dual stand-by functions.

Description

technical field [0001] The present invention relates to the communication field, and more specifically, relates to a mobile terminal and a method for realizing dual modes and dual standby of TD-SCDMA and GSM. Background technique [0002] At present, when dual-standby is realized in a TD-SCDMA / GSM (Time Division synchronous CDMA, referred to as TD-SCDMA; GlobalSystem for Mobile, referred to as GSM) dual-mode mobile phone, it is possible to generate The following two kinds of 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 It is possible to overwhelm unwanted signals and cause interference to the receiver. [0003] The working frequency band of GSM900 is uplink 880~915MHz, the peak maximum transmission power is 33dBm, the downlink is 925~960MHz,...

Claims

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Application Information

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IPC IPC(8): H04Q7/32
Inventor 仝雷黄河
Owner ZTE CORP