CN100512561C - Method for preventing TD-SCDMA/PHS dual-mode terminal radio frequency interference - Google Patents
Method for preventing TD-SCDMA/PHS dual-mode terminal radio frequency interference Download PDFInfo
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- CN100512561C CN100512561C CNB2006101130775A CN200610113077A CN100512561C CN 100512561 C CN100512561 C CN 100512561C CN B2006101130775 A CNB2006101130775 A CN B2006101130775A CN 200610113077 A CN200610113077 A CN 200610113077A CN 100512561 C CN100512561 C CN 100512561C
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- scdma
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- power amplifier
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- baseband chip
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Abstract
The method is in use for mobile communication terminal (MCT) of possessing TD-SCDMA transmission chip, TD-SCDMA baseband chip, TD-SCDMA power amplifier, and PHS module. Using TD-SCDMA baseband chip generates a first controlled signal in order to control power supply of PHS module. When receiving a incoming call or making a outcoming call, TD-SCDMA cuts off power supply of PHS module in order to avoid interference from PHS module. Using TD-SCDMA baseband chip generates a second controlled signal. The AND signal between first controlled signal and DAC1 signal of TD-SCDMA transmission chip is transferred to TD-SCDMA power amplifier. When receiving call in or call out signals of PHS, the invention through the controlled first controlled signal closes down TD-SCDMA power amplifier in order to avoid interference from TD-SCDMA power amplifier. The invention solves issue of mutual interference between two modes in MCT without modifying current protocol stack.
Description
Technical field
The present invention relates to a kind of portable terminal, particularly relate to a kind of TD-SCDMA/PHS dual-mode handset, and prevent the method that generation is disturbed mutually between two module radiofrequency signals in this mobile phone.
Background technology
Because rate difference, a lot of consumers wish to have more than one Mobile Directory Number, select for use flexibly according to actual needs, in the hope of saving telephone expenses.The bimodulus scheme of same mobile communication terminal can fully satisfy this demand on portable basis.
TD-SCDMA is the 3G standard that China proposes, colourful mobile multi-media service can be provided, and power system capacity, the better communication quality bigger than second-generation system is provided, and can realizes seamless roam in the world better and provide the multiple business that comprises speech, data and multimedia etc. for the user.And Personal Handyphone System has promptly occupied the very big market share with cheap communication rate from coming into the market.After this, along with the lifting of product specification, occupation rate of market also progressively enlarges, and has become very important strength of China Mobile's communication field now.In this case, support the TD-SCDMA/PHS dual-mode handset of two kinds of networks of TD-SCDMA of economical and practical Personal Handyphone System and maturation to meet user's demand more simultaneously.
At present, in TD-SCDMA/PHS (TD-SCDMA:Time Division synchronous CDMA, TD SDMA; When PHS:Personal Handset System, personnel hand system) realizing two standby in the dual-mode handset, transmitting of TD-SCDMA and PHS might become the barrage jamming of the other side's receiver.
The working frequency range of PHS system is 1900 ~ 1920MHz, and peak transmitted power is 19dBm, receiver minimum sensitivity-91dBm; The TD-SCDMA working frequency range is 2010 ~ 2025MHz, peak value maximum transmission power 24dBm.PHS agreement regulation receives spurious response and suppresses (comprising the TD-SCDMA frequency range) greater than 47dB, draws the PHS receiver thus when minimum sensitivity+3dB=-88dBm, and spurious signal can not surpass-88+47=-41dBm.By experiment, same terminal inner double antenna space isolation is about 15dB, and hence one can see that is in emission state when the TD-SCDMA system, and the peak signal that arrives the PHS receiver can reach 24-15=9dBm, has surpassed the obstruction index of stipulating in the agreement.If PHS when conversation TD-SCDMA system that shows as emission of user side reality will cause the PHS conversation to be disturbed or go offline.In like manner, when the PHS system was in emission state, the signal strength signal intensity that arrives the TD-SCDMA receiver was 19-15=4dBm, has also surpassed the obstruction index-30dBm that stipulates in the TD-SCDMA agreement.
Summary of the invention
Technical problem to be solved by this invention is, the method that provides a kind of TD-SCDMA/PHS of preventing dual-mode terminal radio frequency to disturb mutually is to solve in the same mobile communication terminal problem of double mode mutual radio frequency interference.
To achieve these goals, the invention provides the method that a kind of TD-SCDMA/PHS of preventing dual-mode terminal radio frequency is disturbed mutually, be used for having the TD-SCDMA transmitting chip simultaneously, the mobile communication terminal of TD-SCDMA baseband chip, TD-SCDMA power amplifier, PHS module, utilize described TD-SCDMA baseband chip to produce one first controllable signal, with the power supply of control to described PHS module, when the calling of receiving TD-SCDMA or when breathing out, cut-out is to the power supply of PHS module, to avoid being subjected to the interference of PHS module;
Utilize described TD-SCDMA baseband chip to produce one second controllable signal, the leg signal DAC1 of described second controllable signal and described TD-SCDMA transmitting chip with after, transfer to described TD-SCDMA power amplifier, when the calling of receiving PHS or when breathing out, close described TD-SCDMA power amplifier by controlling described second controllable signal, to avoid being subjected to the interference of TD-SCDMA power amplifier.
The leg signal DAC1 of described second controllable signal and TD-SCDMA transmitting chip is by one and Men Xiangyu.
The leg signal DAC1 of described second controllable signal and described TD-SCDMA transmitting chip with after transfer to the pin Vref of described TD-SCDMA power amplifier.
Described TD-SCDMA baseband chip can be closed described PHS module by described second controllable signal being put hang down.
Described TD-SCDMA baseband chip can be closed described TD-SCDMA power amplifier by described first controllable signal being put hang down.
Described second controllable signal is transferred to the power supply interface of TD-SCDMA power amplifier.
The present invention can solve the problem of two-mode phase mutual interference in the same mobile communication terminal under the situation of not revising the existing protocol stack.
Description of drawings
Fig. 1 is a TD-SCDMA/PHS dual-mode handset mode switch control circuit schematic diagram.
Embodiment
Below cooperate embodiment and accompanying drawing, describe technical characterictic of the present invention in detail.
The present invention is by when PHS conversation or the TD-SCDMA conversation, closes the TD-SCDMA power amplifier or closes the mode of PHS module, solves work the simultaneously technical problem of phase mutual interference of two systems.
Under the normal ideal case, TD-SCDMA module and PHS module are worked separately, do not disturb mutually.TD-SCDMA search for networks at first during start, the back PHS search for networks again that succeeds in registration, success back user can see the icon of two net standbies on the display screen of mobile communication terminal.Because except cell update, two kinds of patterns all are in the radio frequency accepting state in the most of the time during holding state, do not have alternately, there is not interference yet, therefore do not need radio-frequency module is done special processing.
Below in two kinds of situation and cooperate Fig. 1, the measure of taking when being described in detail in the mutual interference of two-mode phase Figure 1 shows that TD-SCDMA/PHS dual-mode handset mode switch control circuit schematic diagram.
As figure shows, TD-SCDMA/PHS dual-mode handset of the present invention comprise TD-SCDMA transmitting chip 101, TD-SCDMA baseband chip 102, TD-SCDMA power amplifier 103, PHS module 104 and with door 105.Wherein, TD-SCDMA baseband chip 102 is connected with the interface POWERON of PHS module 104 by pin GPI02.TD-SCDMA transmitting chip 101 is connected with door 105 together respectively by pin GPI01 by pin DAC1, TD-SCDMA baseband chip 102, and by be connected the pin Verf of TD-SCDMA power amplifier 103 with door.
Disturb the first kind of situation that takes place to be, when the TD-SCDMA system has telephone access or breathes out, begin to carry out data interaction between the TD-SCDMA system of mobile communication terminal and the base station, the base station signal that arrive the TD-SCDMA receiver end of mobile communication terminal this moment is decided by space loss, and I reaches-108dBm.TD-SCDMA and PHS system all are the time-division synchro systems, and frame length is 5ms.If have PHS to call out in the time of the TD-SCDMA conversation, promptly the PHS transmitter is started working, and its transmitting power is fixed as 19dBm, then will have the TD-SCDMA reception of certain probability and PHS emission to be operated in just in the same time slot.The 19dBm that PHS transmits is by the inhibition of the spatial separation 15dB of same mobile communication terminal internal antenna, and arrival TD-SCDMA receiver end still can become a very big band and suppress signal outward, causes the TD-SCDMA receiver to block system's call drop.
The application sends one first controllable signal by the pin GPI02 of TD-SCDMA baseband chip 102, and the power supply of PHS module is closed in control.Physical circuit is asked for an interview the circuit of empty frame B part among Fig. 1.When the TD-SCDMA system at first receives calling or breathes out, TD-SCDMA is partly promptly in running order, then TD-SCDMA baseband chip 102 sends one first controllable signal by pin GPI02 immediately, interface POWERON to PHS module 104 puts low, thereby close the PHS module for power supply, interface POWERON is power supply interface.This moment, PHS did not work, and just can not have influence on the TD-SCDMA conversation yet.For a side who dials the PHS phone this moment, resulting feedback information is the other side's out of reach or is in talking state, and can realize the feedback of above-mentioned information by software.Behind the TD-SCDMA system end of conversation, equally the interface POWERON of PHS module 104 is put height, open power supply again, make PHS search network again, enter double standby state PHS by first control signal among the GPI02 of TD-SCDMA baseband chip 102.
Disturb the second kind of situation that takes place to be, when the PHS system has telephone access or breathes out, begin to carry out data interaction between the PHS system of mobile communication terminal and the base station, the base station signal strength of the PHS system of mobile communication terminal reception is at this moment determined that by space loss minimum value is-91dBm.If have TD-SCDMA phone incoming call when PHS converses this moment, promptly the TD-SCDMA transmitter is started working, and the maximum peak power of TD-SCDMA emission can reach 24dBm, and this maximum peak power is determined by the space link loss.PHS and TD-SCDMA are all time-division system, and frame length is 5ms, after above-mentioned TD-SCDMA calls out, the TD-SCDMA emission that has certain probability receives with PHS and is in the same time slot, the 24dBm that TD-SCDMA transmits is by the inhibition of the spatial separation 15dB of same mobile communication terminal internal antenna, the band that arrival PHS receiving terminal still can become the PHS receiver suppresses signal outward, causes the PHS receiver to block system's call drop.
At the situation of PHS system works, the application closes the mode of TD-SCDMA system when taking the PHS system works, particularly closes the power amplifier of TD-SCDMA.Physical circuit is shown in the empty frame A part of Fig. 1, the TD-SCDMA power amplifier is to control its switch by pin Vref is put high-low level, and in the prior art, this level only decides by the signal among the pin DAC1 of TD-SCDMA transmitting chip 101, and the value of DAC1 is controlled by underlying protocol stack, therefore can not control the switch of this TD-SCDMA power amplifier according to needs.Therefore the present invention has increased by one tunnel TD-SCDMA baseband chip pin GPI01 that can freely control, send one second control signal follow the DAC1 signal with, can get around the existing protocol stack, the TD-SCDMA power amplifier is controlled.
When the PHS system at first receives calling or breathes out, TD-SCDMA is partly promptly in running order, then put low to second control signal among the pin GPI01 of TD-SCDMA baseband chip immediately, this moment, no matter the DAC1 signal of the transmitting chip 101 controlled at this moment of the protocol stack of TD-SCDMA system was high or low, DAC1 and GPI01 two paths of signals by with Men Xiangyu after, the signal that exports the pin Vref of TD-SCDMA power amplifirer 103 to all is low, can close the TD-SCDMA power amplifier, thereby positive closing TD-SCDMA transmitter just can not have influence on the PHS conversation yet.For a side who dials the TD-SCDMA phone this moment, resulting feedback information is the other side's out of reach or is in talking state, and can realize the feedback of above-mentioned information by software.Wait for the PHS end of conversation, again second controllable signal among the GPI01 is put height, the switch of TD-SCDMA power amplifier 103 is then controlled by transmitting chip DAC1 by protocol stack at this moment, makes mobile communication terminal transmitter operate as normal, the TD-SCDMA system is search network again, enters double standby state.
The present invention can solve the problem of two-mode phase mutual interference in the same mobile communication terminal under the situation of not revising the existing protocol stack.
The foregoing description is only in order to illustrate characteristics of the present invention, make those of ordinary skill in the art can understand content of the present invention and enforcement according to this, be not to be used to limit scope of the present invention, the equivalent modifications of dying all not departing from the scope of the present invention and finishing still is included in claims of the following stated.
Claims (6)
1, prevent the method that the TD-SCDMA/PHS dual-mode terminal radio frequency is disturbed mutually, be used for having the TD-SCDMA transmitting chip simultaneously, the mobile communication terminal of TD-SCDMA baseband chip, TD-SCDMA power amplifier, PHS module, it is characterized in that,
Utilize described TD-SCDMA baseband chip to produce one first controllable signal, to the power supply of described PHS module,, cut off power supply, to avoid being subjected to the interference of PHS module to the PHS module when the calling of receiving TD-SCDMA or when breathing out with control;
Utilize described TD-SCDMA baseband chip to produce one second controllable signal, the leg signal DAC1 of described second controllable signal and described TD-SCDMA transmitting chip with after, transfer to described TD-SCDMA power amplifier, when the calling of receiving PHS or when breathing out, close described TD-SCDMA power amplifier by controlling described second controllable signal, to avoid being subjected to the interference of TD-SCDMA power amplifier.
2, the method for claim 1 is characterized in that, the leg signal DAC1 of described second controllable signal and TD-SCDMA transmitting chip is by one and Men Xiangyu.
3, method as claimed in claim 1 or 2 is characterized in that, the leg signal DAC1 of described second controllable signal and described TD-SCDMA transmitting chip with after transfer to the pin Vref of described TD-SCDMA power amplifier.
4, method as claimed in claim 1 or 2 is characterized in that, described TD-SCDMA baseband chip can be closed described TD-SCDMA power amplifier by described second controllable signal being put hang down.
5, method as claimed in claim 3 is characterized in that, described TD-SCDMA baseband chip can be closed described PHS module by described first controllable signal being put hang down.
6, the method for claim 1 is characterized in that, described second controllable signal is transferred to the power supply interface of TD-SCDMA power amplifier.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2006101130775A CN100512561C (en) | 2006-09-08 | 2006-09-08 | Method for preventing TD-SCDMA/PHS dual-mode terminal radio frequency interference |
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| CNB2006101130775A CN100512561C (en) | 2006-09-08 | 2006-09-08 | Method for preventing TD-SCDMA/PHS dual-mode terminal radio frequency interference |
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| CN101072434A CN101072434A (en) | 2007-11-14 |
| CN100512561C true CN100512561C (en) | 2009-07-08 |
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| US9107168B2 (en) * | 2012-09-19 | 2015-08-11 | Qualcomm Incorporated | Methods and apparatuses for preemptive battery voltage management in multi-SIM mobile devices |
| CN102970051B (en) * | 2012-11-02 | 2015-04-08 | 上海移远通信技术有限公司 | Anti-interference wireless communication system |
| 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 |
| CN104507147B (en) * | 2014-12-02 | 2018-05-29 | 上海华为技术有限公司 | A kind of power amplifier control device and method |
| CN106339742A (en) * | 2015-07-15 | 2017-01-18 | 上海华虹集成电路有限责任公司 | Double-protocol electronic label design method and electronic label |
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