CN101141138A - Method of processing radio frequency interference of dual-mode mobile terminal in adjacent frequency band - Google Patents
Method of processing radio frequency interference of dual-mode mobile terminal in adjacent frequency band Download PDFInfo
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- CN101141138A CN101141138A CNA2006101128544A CN200610112854A CN101141138A CN 101141138 A CN101141138 A CN 101141138A CN A2006101128544 A CNA2006101128544 A CN A2006101128544A CN 200610112854 A CN200610112854 A CN 200610112854A CN 101141138 A CN101141138 A CN 101141138A
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Abstract
The present invention discloses a method to process radio frequency interferences of duplex mobile terminals in adjacent bands, which comprises steps below: I. A RF controller is connected with a CDMA RF loop; II. It is necessary to confirm whether GSM mobile terminals and CDMA mobile terminals synchronously operate in an adjacent band and interference type is that transmitted by GSM mobile terminals and received by CDMA mobile terminals. And then, a transmission time slot control signal of the GSM mobile terminal switches off the RF controller. As the GSM mobile terminal and CDMA synchronously operate in the adjacent band and the interference type is that transmitted by the CDMA mobile terminal and received by the GSM mobile terminal, a receiving time slot control signal of the GSM mobile terminal switches off the RF controller. The present invention optimizes RF performance of adjacent frequencies.
Description
Technical field
The present invention relates to a kind of mode mobile terminal, particularly relate to a kind of GSM (Global System forMobile communication, global system for mobile communications) and CDMA (Code Division MultipleAccess, code division multiple access) mode mobile terminal in the processing method of closing on frequency range radio frequency interference when realizing operate as normal simultaneously.
Background technology
Along with the development of the communication terminal technology and the market demand, various types of mode mobile terminals are succeeded in developing successively.Wherein GSM and CDMA mode mobile terminal are the mode mobile terminals that is most widely used at present.Because the physical channel commonly used of GSM and CDMA exists coincidence on some frequency range, can produce radio frequency interference when causing both to work at the same time.If do not take any treatment measures, so in the case, obvious variation will take place with the interval of dual-mode of operation frequency in the complete machine performance, and will be shown in Figure 1, be to be that example explanation frequency interval is to Effect on Performance with the receiving sensitivity.Problem hereto, present bimodulus design are to take the attitude of avoiding mostly, are about to mode mobile terminal and are designed to the single session mode.Exactly when a certain standard is in talking state, close another standard, therefore a standard can only be arranged in work at synchronization.Individual program is also arranged, mode mobile terminal is designed to bilateral words mode, allow two standards of synchronization to work simultaneously.What these schemes were taked for radio frequency interference is the mode of compromise, is that cost exchanges two standards for and can work simultaneously to sacrifice certain radio-frequency performance promptly.But these processing modes can't accomplish to treat with a certain discrimination with regard to the different situations of frequency interval at present, so that all bring to a certain degree inhibition, Figure 2 shows that the situation that the receiving sensitivity of this class mode mobile terminal changes with frequency interval for the radio-frequency performance of mode mobile terminal in all cases.So in actual bilateral words process, if the network coverage is bad, no matter the frequency of utilization of two kinds of standards at interval how, the bad even frequent phenomenon of call drop of communication effect all can appear in mode mobile terminal.Therefore, also there is as above defective in prior art, needs further improvement and improves.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of mode mobile terminal in the processing method of closing on the frequency range radio frequency interference, be used for closing on frequency range and non-situation of closing on frequency range, realize that the non-situation of frequency range of closing on is not because of being subjected to that the technical finesse that closes under the frequency range situation is brought Performance Constraints or adverse effect by differentiation.
To achieve these goals, the invention provides a kind of mode mobile terminal, be used to comprise the mode mobile terminal system of GSM mobile termination, cdma mobile terminal, it is characterized in that, comprising in the processing method of closing on the frequency range radio frequency interference:
Step 1, serial connection one rf control unit on the radio frequency path of described cdma mobile terminal;
Step 2, judging whether described GSM mobile termination, described cdma mobile terminal are operated in simultaneously closes on frequency range and is operated in interference type when closing on frequency range simultaneously; And
Step 3, when described GSM mobile termination, described cdma mobile terminal are operated in when closing on frequency range simultaneously and during the interference type interference that to be described GSM mobile termination emission receive described cdma mobile terminal, close described rf control unit by the transmission time slot control signal of described GSM mobile termination; When described GSM mobile termination, described cdma mobile terminal are operated in when closing on frequency range simultaneously and during the interference type interference that to be described cdma mobile terminal emission receive described GSM mobile termination, close described rf control unit by the receiving slot control signal of described GSM mobile termination.
Described mode mobile terminal is in the processing method of closing on the frequency range radio frequency interference, and wherein, described rf control unit is a radio-frequency (RF) switch or a radio frequency attenuator.
Described mode mobile terminal is in the processing method of closing on the frequency range radio frequency interference, wherein, described radio-frequency (RF) switch is serially connected between duplexer and the antenna, or is serially connected between duplexer and reflector or the receiver according to the frequency range of described GSM mobile termination and the actual use of cdma mobile terminal.
Described mode mobile terminal is in the processing method of closing on the frequency range radio frequency interference, and wherein, the initial condition of described radio-frequency (RF) switch is a normally open.
Described mode mobile terminal is in the processing method of closing on the frequency range radio frequency interference, wherein, in the described step 2, also comprise and read and judge according to the operating frequency of described GSM mobile termination and the operating frequency of described cdma mobile terminal whether described GSM mobile termination, described cdma mobile terminal are operated in the step of closing on frequency range simultaneously, close on frequency range if the operating frequency of the operating frequency of described GSM mobile termination and described cdma mobile terminal all belongs to, then described GSM mobile termination, described cdma mobile terminal are operated in simultaneously and close on frequency range.
Described mode mobile terminal is in the processing method of closing on the frequency range radio frequency interference, wherein, in the described step 2, also is included in described radio-frequency (RF) switch and is in and carries out the performance test of bilateral words, the step of drawing one first performance curve under the normally open; Be in described radio-frequency (RF) switch and carry out the performance test of bilateral words, the step of drawing one second performance curve under the normally off; And the step of determining the frequency separation according to the intersection point of described first performance curve and described second performance curve.
Described mode mobile terminal is in the processing method of closing on the frequency range radio frequency interference, and wherein, the mode of the isolation by adjusting described radio-frequency (RF) switch promotes the height of described second performance curve.
Described mode mobile terminal is in the processing method of closing on the frequency range radio frequency interference, and wherein, frequency interval belongs to the scope between the described frequency separation from 0 and closes on frequency range, and described frequency of closing in the frequency range is an adjacent frequency.
Described mode mobile terminal is in the processing method of closing on the frequency range radio frequency interference, wherein, actual allocated situation according to network channel is provided with an adjacent frequency channel combination table, and with this adjacent frequency channel combination table and write a memory, judge by the mode of searching this adjacent frequency channel combination table whether described GSM mobile termination, described cdma mobile terminal are operated in simultaneously and close on frequency range and be operated in interference type when closing on frequency range simultaneously.
Described mode mobile terminal is in the processing method of closing on the frequency range radio frequency interference, wherein, in the described step 2, when described GSM mobile termination, described cdma mobile terminal are not operated in when closing on frequency range simultaneously, described radio-frequency (RF) switch placed normally open.
Described mode mobile terminal is in the processing method of closing on the frequency range radio frequency interference, wherein, in the described step 2, when described GSM mobile termination, described cdma mobile terminal are not operated in when closing on frequency range simultaneously, comprise also one judges the step whether described radio-frequency (RF) switch enables,, described radio-frequency (RF) switch is changed to normally open if enable, if entering the bilateral speech phase or carry out physical channel under the bilateral speech phase, not enabled, described GSM mobile termination, described cdma mobile terminal switch.
Described mode mobile terminal wherein, in the described step 3, after described GSM mobile termination, described cdma mobile terminal revert to the single session state from the bilateral speech phase, is changed to normally open with described radio-frequency (RF) switch in the processing method of closing on the frequency range radio frequency interference.
The invention provides a kind of mode mobile terminal in the processing method of closing on frequency range radio frequency interference when working simultaneously, this method is under the situation that does not change current system GSM network and cdma network parameter, the mode that GSM of the inventive method and CDMA mode mobile terminal can adopt radio-frequency (RF) switch to increase isolation reduces the radio frequency rate and disturbs, make under the situation that operating frequency is closed on, mode mobile terminal is realized the bilateral words.
Because CDMA and GSM are when closing on frequency range work, the inventive method increases isolation with the mode of closing radio-frequency (RF) switch, weakened the interference of a kind of emission of standard to another standard, although reduced the part radio-frequency performance, but can guarantee to realize in the ordinary course of things the bilateral words, and can further optimize the radio-frequency performance under the adjacent frequency situation by adjusting the isolation of radio-frequency (RF) switch.Adopt technological means of the present invention, make the radio-frequency performance of closing on dual-mode terminal under the frequency range while working condition that certain guarantee has been arranged on the one hand; Remove present technological means on the other hand to the non-constraint that closes on the performance under the frequency range situation, can make radio-frequency performance under this situation return to the level of general single mode portable terminal, greatly optimized the radio-frequency performance of mode mobile terminal.
Describe the present invention below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.
Description of drawings
Fig. 1 for GSM and CDMA mode mobile terminal when not adopting any measure, receiving sensitivity is with the variation schematic diagram of mode mobile terminal frequency interval;
Fig. 2 be GSM and CDMA mode mobile terminal when adopting prior art, receiving sensitivity is with the variation schematic diagram of mode mobile terminal frequency interval;
Fig. 3 be GSM and CDMA mode mobile terminal when adopting the inventive method, receiving sensitivity is with the variation schematic diagram of mode mobile terminal frequency interval;
Fig. 4 is GSM and the hardware structure diagram of CDMA mode mobile terminal when adopting the inventive method;
Fig. 5 is GSM and the software control flow chart of CDMA mode mobile terminal when adopting the inventive method.
Embodiment
Specific embodiment to the inventive method technical scheme is described in further detail below:
See also shown in Figure 1, for GSM and CDMA mode mobile terminal when not adopting any measure, receiving sensitivity is with the variation schematic diagram of mode mobile terminal frequency interval, shown in Figure 2, for GSM and CDMA mode mobile terminal when adopting prior art, receiving sensitivity is with the variation schematic diagram of mode mobile terminal frequency interval.
For common GSM/CDMA (G/C) mode mobile terminal, owing to have frequency range to overlap at 890MHz-894MHz, the interference that exists the GSM emission that CDMA is received; There is frequency range to overlap at 1850MHz-1880MHz, the interference that exists the CDMA emission that GSM is received.If do not adopt any technical measures, the transmitting-receiving performance of portable terminal will will produce very big variation with the different of CDMA operating frequency interval with GSM, as shown in Figure 1.
See also shown in Figure 3, for GSM and CDMA mode mobile terminal when adopting the inventive method, receiving sensitivity is with the variation schematic diagram of mode mobile terminal frequency interval.
(comprising) situation of mis-behave when working simultaneously that the present invention is directed to that working frequency range closes among Fig. 1 with frequently; And for the non-situation that does not occur mis-behave when frequency range is worked simultaneously of closing on, this method does not produce any adverse effect.Particularly, the situation of closing on for frequency is that two standards that cost exchanges mode mobile terminal for can be worked simultaneously with sacrificing certain performance; And, then keep the performance level originally had for non-adjacent frequency, as shown in Figure 3.
Graph of a relation by receiving sensitivity among comparison diagram 1, Fig. 2 and Fig. 3 and frequency interval, adopt the inventive method for guarantee mode mobile terminal can operate as normal on full frequency band and performance totally good, the present invention only limits to do technical finesse to closing on the situation that frequency range works simultaneously, and does not bring any performance limitations for the non-frequency range of closing on.Compare with existing bilateral words technical merit, be actually and improved non-performance of closing on frequency range.
See also shown in Figure 4ly, be GSM and the CDMA mode mobile terminal hardware structure diagram when adopting the inventive method.This structure chart comprises: GSM baseband circuit 11, GSM radio circuit 12, CDMA baseband circuit 21, CDMA radio circuit 22, rf control unit 40.Rf control unit 40 can be a radio-frequency (RF) switch or a radio frequency attenuator.
When rf control unit 40 was a radio-frequency (RF) switch, GSM baseband circuit 11 connected GSM radio circuit 12, CDMA baseband circuit 21 and radio-frequency (RF) switch 40 respectively; CDMA radio circuit 22 connects CDMA baseband circuit 21, radio-frequency (RF) switch 40; GSM baseband circuit 11 is used to produce GSM transmission time slot control signal, GSM receiving slot control signal, with closing of control radio-frequency (RF) switch 40.
Serial connection radio-frequency (RF) switch 40 on the radio frequency path of CDMA, the particular location of radio-frequency (RF) switch 40 can be between duplexer and antenna, also can be according to the frequency range of GSM and the actual use of CDMA mode mobile terminal, be serially connected between duplexer and the receiver or between duplexer and the reflector, purpose is the path loss of avoiding unnecessary.
Closing by GSM time slot control signal of radio-frequency (RF) switch 40 controlled.If the interference for avoiding the GSM emission that CDMA is received, then radio-frequency (RF) switch 40 is received on the GSM transmission time slot control signal; If the interference for avoiding the CDMA emission that GSM is received, then radio-frequency (RF) switch 40 is received on the GSM receiving slot control signal.The default conditions of radio-frequency (RF) switch 40 are normally open.
When portable terminal carries out normal call conversation under a kind of standard, there is the calling of another standard to enter, portable terminal will be judged: whether two kinds of shared physical channels of standard belong to the situation of adjacent frequency and belong to the sort of combination.
When the operating frequency of GSM, CDMA does not belong to adjacent frequency, keep radio-frequency (RF) switch 40 to be in normally open; When GSM, CDMA are operated in when closing on frequency range simultaneously and during the interference type interference that to be the GSM emission receive CDMA, close radio-frequency (RF) switch 40 with GSM transmission time slot control signal; When GSM, CDMA are operated in when closing on frequency range simultaneously and during the interference type interference that to be the CDMA emission receive GSM, close radio-frequency (RF) switch 40 with GSM receiving slot control signal.
Carry out the performance test of bilateral words under the normally open when radio-frequency (RF) switch 40 is in, can draw and make performance curve, consult shown in Figure 1; Carry out the performance test of bilateral words under the normally off when radio-frequency (RF) switch 40 is in, also can draw and make performance curve, by adjusting the isolation of radio-frequency (RF) switch 40, the height of lifting curve is consulted shown in Figure 2 as far as possible.Wherein, isolation is a main performance index of radio-frequency (RF) switch 40.
Can determine according to the intersection point of Fig. 1 and Fig. 2 that the frequency separation A of adjacent frequency and non-adjacent frequency, frequency interval belong to from the scope 0 to A and close on frequency range, and close on frequency range and comprise end points 0, A that the frequency of closing in the frequency range is called adjacent frequency; Scope beyond the A all belongs to the non-frequency range of closing on.
To different frequency range combinations, reach the mode of determining the frequency separation by drafting Fig. 1, performance curve shown in Figure 2, can determine the frequency separation under the various situations.
See also shown in Figure 5ly, be GSM and the CDMA mode mobile terminal software control flow chart when adopting the inventive method.This software control flow process specifically comprises the steps:
After reverting to the single session state from the bilateral speech phase, radio-frequency (RF) switch places normally open (being default conditions);
After reverting to the single session state from the bilateral speech phase, this moment, radio-frequency (RF) switch was in normally open (being default conditions);
In above control procedure, if the time delay that software is judged is long, cause the radio-frequency (RF) switch response lag, then can be according to the actual allocated situation of network channel, put out in advance adjacent frequency channel combination table in order and write among the FLASH (flash memory), solve by the mode of searching adjacent frequency channel combination table.
Above-mentioned lookup table mode is meant the method for synchronization of determining combination of adjacent frequency channel and radio-frequency (RF) switch through test, for example:
(GSM CH999, CDMA CELL500), radio-frequency (RF) switch and GSM transmission time slot are synchronous;
......；
(GSM CH885, CDMA PCS600), radio-frequency (RF) switch and GSM receiving slot are synchronous;
......；
}
This table is write among the FLASH.Whenever bilateral words start or before radio-frequency channel is switched during the bilateral words, be about to the GSM that uses and the channel combination of CDMA by obtaining, compare with channel combination in the table.If there is this channel combination in the table, then radio-frequency (RF) switch is by the requirement work of back; If there is not this channel combination in the table, then radio-frequency (RF) switch is often put and is opened.This method can be saved the software judgement time effectively.
By closing radio-frequency (RF) switch with GSM transmission time slot control signal or by closing radio-frequency (RF) switch with GSM receiving slot control signal, and make radio-frequency (RF) switch be in closed condition, conversation when just can keep two kinds of standards of GSM and CDMA, judge up to portable terminal and to determine with after wherein a kind of road is kept conversation and hung up the conversation on another road, again radio-frequency (RF) switch is placed normally open, get back to initial condition.
In sum, the present invention has provided a kind of mode mobile terminal is avoided radio frequency interference when closing on frequency range bilateral words method that solves, and guarantees bilateral words function under this state.And for non-adjacent frequency, this method does not produce additional constraint, can make that the mode mobile terminal performance improves a lot under this state, has improved the complete machine performance of mode mobile terminal on certain meaning.
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; those of ordinary skill in the art work as 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 (12)
1. a mode mobile terminal is used to comprise the mode mobile terminal system of GSM mobile termination, cdma mobile terminal in the processing method of closing on the frequency range radio frequency interference, it is characterized in that, comprising:
Step 1, serial connection one rf control unit on the radio frequency path of described cdma mobile terminal;
Step 2, judging whether described GSM mobile termination, described cdma mobile terminal are operated in simultaneously closes on frequency range and is operated in interference type when closing on frequency range simultaneously; And
Step 3, when described GSM mobile termination, described cdma mobile terminal are operated in when closing on frequency range simultaneously and during the interference type interference that to be described GSM mobile termination emission receive described cdma mobile terminal, close described rf control unit by the transmission time slot control signal of described GSM mobile termination; When described GSM mobile termination, described cdma mobile terminal are operated in when closing on frequency range simultaneously and during the interference type interference that to be described cdma mobile terminal emission receive described GSM mobile termination, close described rf control unit by the receiving slot control signal of described GSM mobile termination.
2. mode mobile terminal according to claim 1 is characterized in that in the processing method of closing on the frequency range radio frequency interference described rf control unit is a radio-frequency (RF) switch or a radio frequency attenuator.
3. mode mobile terminal according to claim 2 is in the processing method of closing on the frequency range radio frequency interference, it is characterized in that, described radio-frequency (RF) switch is serially connected between duplexer and the antenna, or is serially connected between duplexer and reflector or the receiver according to the frequency range of described GSM mobile termination and the actual use of cdma mobile terminal.
4. mode mobile terminal according to claim 3 is characterized in that in the processing method of closing on the frequency range radio frequency interference initial condition of described radio-frequency (RF) switch is a normally open.
According to claim 3 or 4 described mode mobile terminals in the processing method of closing on the frequency range radio frequency interference, it is characterized in that, in the described step 2, also comprise and read and judge described GSM mobile termination according to the operating frequency of described GSM mobile termination and the operating frequency of described cdma mobile terminal, whether described cdma mobile terminal is operated in the step of closing on frequency range simultaneously, if all belonging to, the operating frequency of the operating frequency of described GSM mobile termination and described cdma mobile terminal closes on frequency range, then described GSM mobile termination, described cdma mobile terminal is operated in simultaneously and closes on frequency range.
According to claim 3 or 4 described mode mobile terminals in the processing method of closing on the frequency range radio frequency interference, it is characterized in that, in the described step 2, also be included in described radio-frequency (RF) switch and be in and carry out the performance test of bilateral words, the step of drawing one first performance curve under the normally open; Be in described radio-frequency (RF) switch and carry out the performance test of bilateral words, the step of drawing one second performance curve under the normally off; And the step of determining the frequency separation according to the intersection point of described first performance curve and described second performance curve.
7. mode mobile terminal according to claim 6 is characterized in that in the processing method of closing on the frequency range radio frequency interference, and the mode of the isolation by adjusting described radio-frequency (RF) switch promotes the height of described second performance curve.
8. mode mobile terminal according to claim 6 is characterized in that in the processing method of closing on the frequency range radio frequency interference, and frequency interval belongs to the scope between the described frequency separation from 0 and closes on frequency range, and described frequency of closing in the frequency range is an adjacent frequency.
9. mode mobile terminal according to claim 8 is in the processing method of closing on the frequency range radio frequency interference, it is characterized in that, actual allocated situation according to network channel is provided with an adjacent frequency channel combination table, and with this adjacent frequency channel combination table and write a memory, judge by the mode of searching this adjacent frequency channel combination table whether described GSM mobile termination, described cdma mobile terminal are operated in simultaneously and close on frequency range and be operated in interference type when closing on frequency range simultaneously.
According to claim 3,4,7,8 or 9 described mode mobile terminals in the processing method of closing on the frequency range radio frequency interference, it is characterized in that, in the described step 2, when described GSM mobile termination, described cdma mobile terminal are not operated in when closing on frequency range simultaneously, described radio-frequency (RF) switch is placed normally open.
11. according to claim 3,4,7,8 or 9 described mode mobile terminals in the processing method of closing on the frequency range radio frequency interference, it is characterized in that, in the described step 2, when described GSM mobile termination, described cdma mobile terminal are not operated in when closing on frequency range simultaneously, comprise also one judges the step whether described radio-frequency (RF) switch enables, if enable, described radio-frequency (RF) switch is changed to normally open, if entering the bilateral speech phase or carry out physical channel under the bilateral speech phase, not enabled, described GSM mobile termination, described cdma mobile terminal switch.
12. according to claim 3,4,7,8 or 9 described mode mobile terminals in the processing method of closing on the frequency range radio frequency interference, it is characterized in that, in the described step 3, after described GSM mobile termination, described cdma mobile terminal revert to the single session state from the bilateral speech phase, described radio-frequency (RF) switch is changed to normally open.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2006101128544A CN101141138B (en) | 2006-09-05 | 2006-09-05 | Method of processing radio frequency interference of dual-mode mobile terminal in adjacent frequency band |
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| CN2006101128544A CN101141138B (en) | 2006-09-05 | 2006-09-05 | Method of processing radio frequency interference of dual-mode mobile terminal in adjacent frequency band |
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| CN101141138A true CN101141138A (en) | 2008-03-12 |
| CN101141138B CN101141138B (en) | 2010-12-08 |
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| CN101895910A (en) * | 2010-07-09 | 2010-11-24 | 惠州Tcl移动通信有限公司 | Mobile communication terminal and communication method thereof |
| CN102752759A (en) * | 2011-04-19 | 2012-10-24 | 中兴通讯股份有限公司 | Method and system for avoiding radio-frequency interference of terminal |
| CN102843157A (en) * | 2011-06-21 | 2012-12-26 | 深圳富泰宏精密工业有限公司 | Double-mode mutual-interference sensitivity increasing system and method |
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| CN1731692A (en) * | 2005-08-09 | 2006-02-08 | 杭州斯达康通讯有限公司 | Dual-mode communication terminal capable of restraining two mode signal RF crosstalk interference and restraining method |
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