CN101052189A - Double mode double standby mobile terminal for reducing GSM interference to TD-SCDMA and its realizing method - Google Patents
Double mode double standby mobile terminal for reducing GSM interference to TD-SCDMA and its realizing method Download PDFInfo
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- CN101052189A CN101052189A CNA2007100991733A CN200710099173A CN101052189A CN 101052189 A CN101052189 A CN 101052189A CN A2007100991733 A CNA2007100991733 A CN A2007100991733A CN 200710099173 A CN200710099173 A CN 200710099173A CN 101052189 A CN101052189 A CN 101052189A
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- acoustic wave
- surface acoustic
- wave filter
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Abstract
The invention comprises: a GSM transceiver chip, power a power amplifier, a GSM antenna and its switch, a TD-SCDMA reception chip, a first surface acoustic wave filter and a TD-SCDMA antenna and its switch. The invention also comprises a media filter sitting between the amplifier and the GSM antenna and used for reducing the leakage of side band noise; a second filter sitting between the first sound acoustic wave filter and the TD-SCDMA antenna and used for reducing the received GSM interference signal power. The invention uses a newly-added media filter to reduce the side band noise leakage of the GSM signals sent from GSM transceiver chip, and to reduce the GSM signal power received by TD-SCDMA receiving chip.
Description
Technical field
The invention belongs to mobile communication terminal field, relate in particular to double-mode double-standby mobile terminal and its implementation that a kind of GSM of reduction disturbs TD-SCDMA.
Background technology
3G standard-the TD-SCDMA of China's independent research will begin trial run in the near future, but will have in the face of the comprehensive inadequately problem of the network coverage at first stage of construction, if can not resolve this realistic problem, the TD-SCDMA network user's development will be influenced greatly.Addressing this problem best scheme at present is exactly to mend net by other networks for the TD-SCDMA network.In the environment that has the TD-SCDMA network, the user can use the superior function of 3G network, and under the situation that does not have the TD-SCDMA network, the user also can use the service guarantees user's of other network normal communication.Cheng Shu GSM network just in time can satisfy above-mentioned condition already, if adopt TD-SCDMA/GSM double-mode double-standby mobile terminal equipment, just can satisfy the demand that the GSM network replenishes the TD-SCDMA network.To transition period of 3G, the mobile phone that on the market 2G is combined with 3G has very big demand at 2G, and the TD-SCDMA/GSM dual-mode handset arises at the historic moment.
But, because TD-SCDMA receives the transmit frequency band of frequency range and GSM relatively near (the DCS1800 transmit frequency band is 1710--1785MHz, maximum transmission power 30dBm; The TD-SCDMA working frequency range is 2010--2025MHz, maximum transmission power 24dBm), two kinds of patterns are worked simultaneously, and the mutual interference of radiofrequency signal phase can have a strong impact on speech quality, even call drop.So dual-mode handset in the past can only be realized the double-mode single-standby function, promptly in a kind of pattern work, another pattern is in closed condition.
And in order to allow mode mobile terminal can realize a kind of method being arranged the function of two standbies, mutual radio frequency interference in the time of can reducing by two kinds of patterns and work simultaneously.Present common measure is to improve antenna, and increase isolation between the antenna by following method: 1, two kinds of patterns are used separately independently antenna respectively, and increase the distance between two antennas as far as possible; 2, two antennas adopt different polarization modes, make perpendicular polarization for one, and then another adopts horizontal polarization mode; Perhaps, an antenna adopts+45 ° of polarization, another employing-45 ° polarization.These two kinds of methods all be in order to increase the isolation between the antenna, though realized the double-mode and double-standby function of portable terminal, but effect is very undesirable, simultaneously also brought corresponding problem: first method is in order to increase the distance between the antenna, the size lengthening of mobile phone so just must have been influenced the attractive in appearance and fashion of mobile phone; Second method can influence the performance of antenna, and then influences mobile phone overall performance and speech quality.
Summary of the invention
It is bad that the present invention is intended to solve the method effect that reduces radio frequency interference mutual when two kinds of patterns are worked simultaneously in the double-mode double-standby mobile terminal in the prior art, influence the problem of cell phone appearance size and antenna performance simultaneously, double-mode double-standby mobile terminal and its implementation of providing a kind of GSM of reduction that TD-SCDMA is disturbed, effectively reduce two kinds of patterns mutual radio frequency interference when working simultaneously, do not influence cell phone appearance size and antenna performance simultaneously again.
To achieve these goals, the invention provides the double-mode double-standby mobile terminal that a kind of GSM of reduction disturbs TD-SCDMA, comprise GSM transceiving chip, power amplifier, GSM antenna and switch thereof, TD-SCDMA receiving chip, first Surface Acoustic Wave Filter and TD-SCDMA antenna and switch thereof, its characteristics are, also comprise
Dielectric filter between described power amplifier and described GSM antenna, is used to reduce the GSM signal and leaks at the sideband noise of TD frequency range;
Second Surface Acoustic Wave Filter between described first Surface Acoustic Wave Filter and described TD-SCDMA antenna, is used to reduce the GSM barrage jamming signal power that receives.
Above-mentioned portable terminal, its characteristics are that the anti-power of described dielectric filter is more than or equal to 30dBm.
Above-mentioned portable terminal, its characteristics are that the Insertion Loss of described dielectric filter is less than or equal to 2dB.
Above-mentioned portable terminal, its characteristics are that the total Insertion Loss after described first Surface Acoustic Wave Filter and the series connection of described second Surface Acoustic Wave Filter is less than or equal to 3dB.
In order to realize above-mentioned purpose better, the present invention provides a kind of portable terminal to reduce GSM to the implementation method that TD-SCDMA disturbs again, comprises
Forwarding step, the GSM transceiving chip sends radiofrequency signal to power amplifier;
Amplification procedure, described power amplifier is with described radiofrequency signal amplification and send to the GSM antenna;
Switch process, first Surface Acoustic Wave Filter is converted to the radiofrequency signal that the TD-SCDMA antenna receives differential signal and sends to the TD-SCDMA receiving chip;
Receiving step, described TD-SCDMA receiving chip receives described differential signal;
Its characteristics are, also comprise
Reduce and leak step, the GSM signal that dielectric filter reduces after described power amplifier amplifies leaks at the sideband noise of TD frequency range;
Reduce and disturb step, second Surface Acoustic Wave Filter reduces the GSM barrage jamming signal power that described first Surface Acoustic Wave Filter receives.
Above-mentioned implementation method, its characteristics are that the anti-power of described dielectric filter is more than or equal to 30dBm.
Above-mentioned implementation method, its characteristics are that the Insertion Loss of described dielectric filter is less than or equal to 2dB.
Above-mentioned implementation method, its characteristics are that the total Insertion Loss after described first Surface Acoustic Wave Filter and the series connection of described second Surface Acoustic Wave Filter is less than or equal to 3dB.
Portable terminal provided by the invention and method, leak by increasing the sideband noise that dielectric filter reduces the GSM signal that the GSM transceiving chip sends, reduce the GSM signal power that the TD-SCDMA receiving chip receives with the increase Surface Acoustic Wave Filter, effectively reduce two kinds of patterns mutual radio frequency interference when doing simultaneously, the increase of these two kinds of filters simultaneously can not influence the performance of antenna of the outward appearance of mobile phone again.
Description of drawings
Fig. 1 is the circuit block diagram of double-mode double-standby mobile terminal among the present invention;
Fig. 2 is a double-mode double-standby mobile terminal gsm module workflow diagram among the present invention;
Fig. 3 is a double-mode double-standby mobile terminal TD-SCDMA module workflow diagram among the present invention.
Embodiment
Figure 1 shows that the circuit block diagram of double-mode double-standby mobile terminal of the present invention, comprise gsm module 100 and TD-SCDMA module 150.Gsm module 100 comprises GSM transceiving chip 110, power amplifier (PA) 120, dielectric filter 130 and GSM antenna and switch 140 thereof.TD-SCDMA module 150 comprises TD-SCDMA receiving chip 160, first Surface Acoustic Wave Filter (SAW1) 170, second Surface Acoustic Wave Filter (SAW2) 180 and TD-SCDMA antenna and switch 190 thereof.The anti-power of dielectric filter 130 wherein, the maximum power that promptly can bear is greater than or equals 30dBm, and Insertion Loss is less than or equal 2dB.First Surface Acoustic Wave Filter 170 is that single-ended transfer difference receives Surface Acoustic Wave Filter, and second Surface Acoustic Wave Filter 180 is the single-ended commentaries on classics single-termination table filter that quiets down, and the total Insertion Loss after two filters series connection is less than or equals 3dB.GSM antenna and switch 140 thereof and TD-SCDMA antenna and switch 190 thereof are separate, are placed on the top and the bottom of this portable terminal respectively.
As shown in Figure 2, it is as follows that gsm module sends signal flow:
Step S210, GSM transceiving chip send radiofrequency signal to power amplifier;
Signal after step S220, power amplifier amplifying signal also will amplify sends to dielectric filter;
Step S230, dielectric filter reduce the GSM signal and send signal to the GSM antenna after the sideband noise of TD frequency range leak.
As shown in Figure 3, TD-SCDMA module received signal flow process is as follows:
Step S310, the second Surface Acoustic Wave Filter received RF signal sends signal to first Surface Acoustic Wave Filter behind the GSM barrage jamming signal power that reduction receives;
Step S320, first Surface Acoustic Wave Filter sends to the TD-SCDMA receiving chip after radiofrequency signal is converted to differential signal;
Step S330, the TD-SCDMA receiving chip receives differential signal.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; being familiar with those of ordinary skill in the art ought can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (8)
1, a kind of double-mode double-standby mobile terminal that reduces GSM to the TD-SCDMA interference, comprise GSM transceiving chip, power amplifier, GSM antenna and switch thereof, TD-SCDMA receiving chip, first Surface Acoustic Wave Filter and TD-SCDMA antenna and switch thereof, it is characterized in that, also comprise
Dielectric filter between described power amplifier and described GSM antenna, is used to reduce the GSM signal and leaks at the sideband noise of TD frequency range;
Second Surface Acoustic Wave Filter between described first Surface Acoustic Wave Filter and described TD-SCDMA antenna, is used to reduce the GSM barrage jamming signal power that receives.
2, portable terminal according to claim 1 is characterized in that, the anti-power of described dielectric filter is more than or equal to 30dBm.
3, portable terminal according to claim 1 is characterized in that, the Insertion Loss of described dielectric filter is less than or equal to 2dB.
4, portable terminal according to claim 1 is characterized in that, the total Insertion Loss after described first Surface Acoustic Wave Filter and the series connection of described second Surface Acoustic Wave Filter is less than or equal to 3dB.
5, a kind of described portable terminal of claim 1 that utilizes reduces GSM to the implementation method that TD-SCDMA disturbs, and comprises
Forwarding step, the GSM transceiving chip sends radiofrequency signal to power amplifier;
Amplification procedure, described power amplifier is with described radiofrequency signal amplification and send to the GSM antenna;
Switch process, first Surface Acoustic Wave Filter is converted to the radiofrequency signal that the TD-SCDMA antenna receives differential signal and sends to the TD-SCDMA receiving chip;
Receiving step, described TD-SCDMA receiving chip receives described differential signal;
It is characterized in that, also comprise
Reduce and leak step, the GSM signal that dielectric filter reduces after described power amplifier amplifies leaks at the sideband noise of TD frequency range;
Reduce and disturb step, second Surface Acoustic Wave Filter reduces the GSM barrage jamming signal power that described first Surface Acoustic Wave Filter receives.
6, implementation method according to claim 5 is characterized in that, the anti-power of described dielectric filter is more than or equal to 30dBm.
7, implementation method according to claim 5 is characterized in that, the Insertion Loss of described dielectric filter is less than or equal to 2dB.
8, implementation method according to claim 5 is characterized in that, the total Insertion Loss after described first Surface Acoustic Wave Filter and the series connection of described second Surface Acoustic Wave Filter is less than or equal to 3dB.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100991733A CN100502542C (en) | 2007-05-15 | 2007-05-15 | Double mode double standby mobile terminal for reducing GSM interference to TD-SCDMA and its realizing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100991733A CN100502542C (en) | 2007-05-15 | 2007-05-15 | Double mode double standby mobile terminal for reducing GSM interference to TD-SCDMA and its realizing method |
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| Publication Number | Publication Date |
|---|---|
| CN101052189A true CN101052189A (en) | 2007-10-10 |
| CN100502542C CN100502542C (en) | 2009-06-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2007100991733A Expired - Fee Related CN100502542C (en) | 2007-05-15 | 2007-05-15 | Double mode double standby mobile terminal for reducing GSM interference to TD-SCDMA and its realizing method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101873184A (en) * | 2010-06-13 | 2010-10-27 | 工业和信息化部电信传输研究所 | Video interference test method and system based on mobile communication terminal |
| CN101237285B (en) * | 2007-12-09 | 2011-02-02 | 青岛海信移动通信技术股份有限公司 | A method for testing wireless interference of GSM dual-mode and dual-idle |
| CN104378138A (en) * | 2014-11-04 | 2015-02-25 | 东莞宇龙通信科技有限公司 | Method and device for suppressing radio-frequency mutual interference and multi-mode and multi-standby communication terminal |
| CN111181582A (en) * | 2020-01-06 | 2020-05-19 | 闻泰通讯股份有限公司 | Interference signal processing method and device and GSM mobile terminal |
| CN114915304A (en) * | 2022-03-28 | 2022-08-16 | 海能达通信股份有限公司 | Receiver and signal anti-interference circuit and signal anti-interference method thereof |
-
2007
- 2007-05-15 CN CNB2007100991733A patent/CN100502542C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101237285B (en) * | 2007-12-09 | 2011-02-02 | 青岛海信移动通信技术股份有限公司 | A method for testing wireless interference of GSM dual-mode and dual-idle |
| CN101873184A (en) * | 2010-06-13 | 2010-10-27 | 工业和信息化部电信传输研究所 | Video interference test method and system based on mobile communication terminal |
| CN104378138A (en) * | 2014-11-04 | 2015-02-25 | 东莞宇龙通信科技有限公司 | Method and device for suppressing radio-frequency mutual interference and multi-mode and multi-standby communication terminal |
| CN111181582A (en) * | 2020-01-06 | 2020-05-19 | 闻泰通讯股份有限公司 | Interference signal processing method and device and GSM mobile terminal |
| CN114915304A (en) * | 2022-03-28 | 2022-08-16 | 海能达通信股份有限公司 | Receiver and signal anti-interference circuit and signal anti-interference method thereof |
| CN114915304B (en) * | 2022-03-28 | 2023-08-11 | 海能达通信股份有限公司 | Receiver, signal anti-interference circuit thereof and signal anti-interference method |
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| Publication number | Publication date |
|---|---|
| CN100502542C (en) | 2009-06-17 |
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Application publication date: 20071010 Assignee: SHENZHEN ZTE MICROELECTRONICS TECHNOLOGY CO., LTD. Assignor: ZTE Corporation Contract record no.: 2015440020319 Denomination of invention: Double mode double standby mobile terminal for reducing GSM interference to TD-SCDMA and its realizing method Granted publication date: 20090617 License type: Common License Record date: 20151123 |
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