CN101154951A - Method and device for double-module mobile terminal reducing radio frequency interference - Google Patents
Method and device for double-module mobile terminal reducing radio frequency interference Download PDFInfo
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- CN101154951A CN101154951A CNA2006101523401A CN200610152340A CN101154951A CN 101154951 A CN101154951 A CN 101154951A CN A2006101523401 A CNA2006101523401 A CN A2006101523401A CN 200610152340 A CN200610152340 A CN 200610152340A CN 101154951 A CN101154951 A CN 101154951A
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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
The present invention relates to a kind of mode mobile terminal, relate in particular to the method and apparatus that a kind of GSM and CDMA mode mobile terminal are worked simultaneously at high band (DCS and PCS frequency range).
Background technology
Along with the development of mode mobile terminal user's request, the developer is faced with increasing technological challenge.Wherein the GSM/CDMA mode mobile terminal is at DCS frequency range (1710-1880MHz, abbreviate the 1800M frequency range as) and PCS frequency range (1850-1990MHz, abbreviating the 1900M frequency range as) disturbing mutually of working simultaneously be a tangible problem, because the domestic network that does not have the PCS frequency range of CDMA basically, the portable terminal of listing is not taked any effective measures to this at present, but in laboratory tests, when these two frequency ranges were worked simultaneously, CDMA produced tremendous influence to GSM.
For the GC mode mobile terminal of supporting CDMA 1900M frequency range and GSM 1800M frequency range, GSM1900M frequency range, when the adjacent frequency of CDMA1900M frequency range and GSM1800M frequency range or GSM1900M frequency range is worked simultaneously, the emission of CDMA produces huge interference to the reception of GSM, cause the receiving sensitivity of GSM to descend significantly, have a strong impact on the communication quality of GSM.Therefore, exist at the same time in the communication network environment of the 1800M frequency range of CDMA and GSM and 1900M frequency range, this class mode mobile terminal can't normally use.
Summary of the invention
The technical problem to be solved in the present invention provides the method and apparatus that a kind of mode mobile terminal reduces radio frequency interference.Make when the adjacent frequency of CDMA1900M frequency range and GSM1800M frequency range or GSM1900M frequency range is worked simultaneously, weaken the interference of the emission of CDMA, and drop to minimum the influence of CDMA communication quality to the GSM reception.
In order to solve the problems of the technologies described above, the present invention proposes the method that a kind of mode mobile terminal reduces radio frequency interference, may further comprise the steps:
(1) is operated under 1800M or the 1900M frequency range and is operated in receiving slot when gsm module, export an effective control signal, otherwise control signal is invalid;
(2) if control signal is effective, and CDMA is operated in the 1900M frequency range, weakens the transmitting power of CDMA signal.
Further, said method also can have following characteristics: in the described step (2), as described control signal effectively but CDMA is operated in the 800M frequency range, or this control signal is invalid, the CDMA signal is launched by normal power.
Further, said method also can have following characteristics: in the described step (2), output weakens the transmitting power that the control signal of launching path gain or closing power amplifier weakens the CDMA signal.
Further, said method also can have following characteristics: export normal transmission power by the control signal of normal transmission path gain or power amplifier.
A kind of mode mobile terminal reduces the device of radio frequency interference, described device comprises global system for mobile communications gsm module and code division multiple access CDMA module, wherein, gsm module comprises GSM baseband circuit, GSM radio-frequency (RF) transceiver and the GSM radio-frequency front-end that connects successively, the CDMA module comprises the CDMA baseband circuit, the CDMA radio-frequency transmissions circuit that links to each other with this baseband circuit and CDMA radio-frequency (RF) receiving circuit and duplexer is characterized in that:
Described device also comprises an analog switch, the control end of described analog switch is the control signal a that draws from GSM radio-frequency front-end or GSM baseband circuit, the path signal b1 of CDMA baseband circuit and b2 are as two inputs of analog switch, and control signal is input to CDMA radio-frequency transmissions circuit with the alternative pathway signal of gating;
Control signal a is operated in 1800M frequency range or 1900M frequency range at GSM, and effective when being operated in receiving slot; When signal b1 is operated in the 1900M frequency range at CDMA,, when CDMA is operated in the 800M frequency range, be the control signal of normal emission path gain or power amplifier for weakening the control signal of launching path gain or closing power amplifier; Signal b2 is the control signal of launching path gain or power amplifier under the normal operation.
Further, said apparatus also can have following characteristics: directly draw control signal a or obtain the control signal a of described analog switch by decoder from GSM radio-frequency front-end or GSM baseband circuit.
Compared with prior art, the method of the invention and device are under the situation that does not change current system GSM network and cdma network parameter, by adjusting the CDMA transmitting power of GSM receiving slot, reduced the suffered interference of GSM, do not influence simultaneously the receptivity of CDMA, greatly optimized the radio-frequency performance of mode mobile terminal.
Description of drawings
Fig. 1 is the circuit theory diagrams of embodiment.
Embodiment
Figure 1 shows that the device of a kind of GSM/CDMA of weakening mode mobile terminal radio frequency interference when DCS and PCS frequency range are worked simultaneously.Described device comprises gsm module and CDMA module, wherein, gsm module comprises GSM baseband circuit, GSM radio-frequency (RF) transceiver and the GSM radio-frequency front-end that connects successively, the CDMA module comprises CDMA baseband circuit, CDMA radio-frequency transmissions circuit/CDMA radio-frequency (RF) receiving circuit and the duplexer that connects successively, and CDMA radio-frequency transmissions circuit and CDMA radio-frequency (RF) receiving circuit are parallel with one another.
Described device also comprises an analog switch, 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 pathway signal b1 of CDMA baseband circuit and b2 are as two inputs of analog switch, control signal a becomes the control signal of gating signal b1 or b2, and the gating result is input to CDMA radio-frequency transmissions circuit.Signal a is effective when GSM is operated in the receiving slot of 1800M or 1900M frequency range; When signal b1 is operated in the 1900M frequency range at CDMA,, when CDMA is operated in the 800M frequency range, be the control signal of normal emission path gain or power amplifier for weakening the control signal of launching path gain or closing power amplifier; Signal b2 is the control signal of launching path gain or power amplifier under the normal operation.
According to side circuit with use the different of device, can directly draw a control signal, also can obtain a control signal by decoder.
The group coding that decoder will be imported is handled, and draws number control signal and removes to control different devices.For different GSM radio-frequency (RF) front-end circuit, the mode difference of the frequency-selecting coding that is received when being operated in different frequency range, and the frequency-selecting coding to 1800MHz and 1900MHz will be shut away mutually with the CDMA module, just need decoder that the frequency-selecting coding is handled, draw appropriate control signals and go to control the CDMA module.
Can draw from GSM front-end circuit or GSM baseband circuit for GSM frequency-selecting code signal; CDMA frequency-selecting code signal can be drawn from the CDMA baseband circuit, multiplexing output signal b1, output reduces or closes the control signal of transmitting power when making it to meet CDMA and being operated in the 1900M frequency range, and the situation of CDMA output normal control signal when being operated in the 800M frequency range.
The device that a kind of use weakens radio frequency interference carries out the method that radio frequency weakens, and may further comprise the steps:
Step 110 when gsm module is operated under 1800M or the 1900M frequency range and is operated in receiving slot, export an effective control signal a, otherwise control signal a is invalid;
Step 120 judges whether control signal a is effective, if effectively, and execution in step 130, otherwise, execution in step 140;
Step 130, control signal switches on the b1, if CDMA is operated in the 1900M frequency range, then b1 goes up the control signal that output weakens the emission path gain or closes power amplifier, weakens the transmitting power of CDMA signal; If CDMA is operated in the 800M frequency range, then b1 goes up the control signal of output normal transmission path gain or power amplifier;
As for finally being to select to close the CDMA power amplifier or the gain that reduces the CDMA transmitting chip, lower how many gains, be closely related with the concrete condition of the specific design scheme of dual-mode handset and applicable network, need just can finally confirm through on-the-spot test.
Step 140, control signal switch on the b2, emission path gain or power amplifier control signal under the output normal operation, and the CDMA signal is launched by normal power.
Need to prove that the inventive method is not limited in the dual-mode handset of CDMA/GSM standard,, exist some frequency range of same problem also to be suitable for as standards such as W-CDMA/GSM, TD-SCDMA/GSM, PHS/GSM for other standards.
Should be understood that; concerning the those of ordinary skill in field, the technology of the present invention place; can be equal to accordingly according to technical scheme of the present invention and design thereof and change or replace, and all these changes or replacement, all should belong to the protection range of claims of the present invention.
For example, in another embodiment, on realizing, concrete hardware difference is arranged with the foregoing description, as no longer carrying out multiplexing to b1, but draw b1 from the CDMA baseband circuit, and three signals of b2 and b3, wherein b1 is the control signal of normal emission path gain or power amplifier, b2 is the control signal that weakens the emission path gain or close power amplifier, and b3 is a CDMA frequency-selecting code signal and effective when 1900M.Same as the previously described embodiments from the control signal a that GSM radio-frequency (RF) front-end circuit or baseband circuit are drawn, earlier signal b3 and signal a are carried out and computing, and then as the gating signal of two input signal b1 of analog switch and b2, when promptly this gating signal is effective, select b1 output, otherwise, select b2 output.Effect is the same.Same, the method flow in the foregoing description also can change thereupon, as long as can realize the logic of summary of the invention part method flow.
Claims (6)
1. a mode mobile terminal weakens the method for radio frequency interference, may further comprise the steps:
(1) is operated under 1800M or the 1900M frequency range and is operated in receiving slot when gsm module, export an effective control signal, otherwise control signal is invalid;
(2) if control signal is effective, and CDMA is operated in the 1900M frequency range, weakens the transmitting power of CDMA signal.
2. method according to claim 1 is characterized in that:
In the described step (2), as described control signal effectively but CDMA is operated in the 800M frequency range, or this control signal is invalid, the CDMA signal is launched by normal power.
3. method according to claim 1 is characterized in that:
In the described step (2), output weakens the transmitting power that the control signal of launching path gain or closing power amplifier weakens the CDMA signal.
4. as method as described in the claim 2, it is characterized in that:
Export normal transmission power by the control signal of normal transmission path gain or power amplifier.
5. a mode mobile terminal reduces the device of radio frequency interference, described device comprises global system for mobile communications gsm module and code division multiple access CDMA module, wherein, gsm module comprises GSM baseband circuit, GSM radio-frequency (RF) transceiver and the GSM radio-frequency front-end that connects successively, the CDMA module comprises the CDMA baseband circuit, the CDMA radio-frequency transmissions circuit that links to each other with this baseband circuit and CDMA radio-frequency (RF) receiving circuit and duplexer is characterized in that:
Described device also comprises an analog switch, the control end of described analog switch is the control signal a that draws from GSM radio-frequency front-end or GSM baseband circuit, the path signal b1 of CDMA baseband circuit and b2 are as two inputs of analog switch, and control signal is input to CDMA radio-frequency transmissions circuit with the alternative pathway signal of gating;
Control signal a is operated in 1800M frequency range or 1900M frequency range at GSM, and effective when being operated in receiving slot; When signal b1 is operated in the 1900M frequency range at CDMA,, when CDMA is operated in the 800M frequency range, be the control signal of normal emission path gain or power amplifier for weakening the control signal of launching path gain or closing power amplifier; Signal b2 is the control signal of launching path gain or power amplifier under the normal operation.
6. as device as described in the claim 5, it is characterized in that:
Directly draw control signal a or obtain the control signal a of described analog switch by decoder from GSM radio-frequency front-end or GSM baseband circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2006101523401A CN101154951A (en) | 2006-09-26 | 2006-09-26 | Method and device for double-module mobile terminal reducing radio frequency interference |
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| CNA2006101523401A CN101154951A (en) | 2006-09-26 | 2006-09-26 | Method and device for double-module mobile terminal reducing radio frequency interference |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101951676A (en) * | 2009-07-09 | 2011-01-19 | 联发科技股份有限公司 | Mobile communication system and method for reducing signal interference |
| WO2012100594A1 (en) * | 2011-01-27 | 2012-08-02 | 中兴通讯股份有限公司 | Method and system for avoiding inter-mode interference by terminal |
| CN102820896A (en) * | 2012-09-10 | 2012-12-12 | 苏州云达通信科技有限公司 | Device for preventing same frequency interference between communication modules |
| CN103957061A (en) * | 2014-05-15 | 2014-07-30 | 深圳市几米电子有限公司 | Anti-interference implementation method involving multiple radio-frequency module devices |
| CN105191484A (en) * | 2013-03-14 | 2015-12-23 | 高通股份有限公司 | Dual-SIM wireless communications device and method for mitigating receiver desense in dual-active operation |
| US9236896B2 (en) | 2009-07-09 | 2016-01-12 | Mediatek Inc. | Systems and methods for coexistence of a plurality of wireless communications modules |
| CN105307178A (en) * | 2014-07-31 | 2016-02-03 | 展讯通信（上海）有限公司 | Dual-mode dual-connection terminal and communication method thereof |
| CN105376818A (en) * | 2014-08-29 | 2016-03-02 | 展讯通信（上海）有限公司 | Method for coexistence of multiple wireless communication technologies in mobile terminal and mobile terminal |
| US9504092B2 (en) | 2009-07-09 | 2016-11-22 | Mediatek Inc. | System for the coexistence between a plurality of wireless communications modules sharing single antenna |
| CN109041184A (en) * | 2018-08-28 | 2018-12-18 | 维沃移动通信有限公司 | A kind of terminal control method and terminal |
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2006
- 2006-09-26 CN CNA2006101523401A patent/CN101154951A/en active Pending
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9236896B2 (en) | 2009-07-09 | 2016-01-12 | Mediatek Inc. | Systems and methods for coexistence of a plurality of wireless communications modules |
| US8774722B2 (en) | 2009-07-09 | 2014-07-08 | Mediatek Inc. | Systems and methods for reducing interference between a plurality of wireless communications modules |
| US9504092B2 (en) | 2009-07-09 | 2016-11-22 | Mediatek Inc. | System for the coexistence between a plurality of wireless communications modules sharing single antenna |
| US8913962B2 (en) | 2009-07-09 | 2014-12-16 | Mediatek Inc | Systems and methods for reducing interference between a plurality of wireless communications modules |
| CN101951676A (en) * | 2009-07-09 | 2011-01-19 | 联发科技股份有限公司 | Mobile communication system and method for reducing signal interference |
| WO2012100594A1 (en) * | 2011-01-27 | 2012-08-02 | 中兴通讯股份有限公司 | Method and system for avoiding inter-mode interference by terminal |
| CN102820896A (en) * | 2012-09-10 | 2012-12-12 | 苏州云达通信科技有限公司 | Device for preventing same frequency interference between communication modules |
| CN105191484A (en) * | 2013-03-14 | 2015-12-23 | 高通股份有限公司 | Dual-SIM wireless communications device and method for mitigating receiver desense in dual-active operation |
| CN105191484B (en) * | 2013-03-14 | 2018-12-21 | 高通股份有限公司 | For mitigating the double SIM wireless telecom equipments and method that the receiver sensitivity in bilateral operation reduces |
| CN103957061B (en) * | 2014-05-15 | 2016-06-15 | 深圳市几米软件有限公司 | A kind of anti-interference realization method with multi-radio device |
| CN103957061A (en) * | 2014-05-15 | 2014-07-30 | 深圳市几米电子有限公司 | Anti-interference implementation method involving multiple radio-frequency module devices |
| CN105307178A (en) * | 2014-07-31 | 2016-02-03 | 展讯通信（上海）有限公司 | Dual-mode dual-connection terminal and communication method thereof |
| CN105376818A (en) * | 2014-08-29 | 2016-03-02 | 展讯通信（上海）有限公司 | Method for coexistence of multiple wireless communication technologies in mobile terminal and mobile terminal |
| CN105376818B (en) * | 2014-08-29 | 2018-09-11 | 展讯通信（上海）有限公司 | The method and mobile terminal of various wireless communication technology co-existence in mobile terminal |
| CN109041184A (en) * | 2018-08-28 | 2018-12-18 | 维沃移动通信有限公司 | A kind of terminal control method and terminal |
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Application publication date: 20080402 |