CN102780994B - Mobile communication terminal and method for realizing coexistence of different communication systems - Google Patents
Mobile communication terminal and method for realizing coexistence of different communication systems Download PDFInfo
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- CN102780994B CN102780994B CN201110119643.4A CN201110119643A CN102780994B CN 102780994 B CN102780994 B CN 102780994B CN 201110119643 A CN201110119643 A CN 201110119643A CN 102780994 B CN102780994 B CN 102780994B
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Abstract
The invention discloses a mobile communication terminal and a method for realizing the coexistence of different communication systems. The mobile terminal comprises a GSM (global system for mobile communication) radio-frequency transceiver and a TDD (time division duplex) network radio-frequency transceiver, wherein a receiving branch of the GSM radio-frequency transceiver comprises a sub-band filter, a full-band filter and a filter selection control device; the sub-band filter is used for filtering out signals not belonging to a first frequency band at a working state, the first frequency band is a subset of the full band of GSM, and the maximum frequency of the first frequency band is less than that of the full band of GSM; the full-band filter is used for filtering out signals not belonging to the full band of GSM at a working state; and the filter selection control device is used for controlling the sub-band filter to work and the full-band filter not to work when judging that the mobile communication terminal is in an environment of the coexisting adjacent frequency of the GSM network and the TDD network. The invention can ensure that the GSM system and the TDD system in the mobile communication terminal are simultaneously in a normal standby state or working state.
Description
Technical field
The present invention relates to moving communicating field, particularly relate to a kind of mobile communication terminal and realize the method that different communication systems coexists.
Background technology
In prior art, during different wireless communication technology adjacent frequency coexistence, due to the non-linearity of transmitter and receiver, can produce and interfere with each other, will the decline of systematic function be caused if do not solved, time serious, even cause system to work.
Due to time division duplex (time-division duplex, TDD) system such as time division synchronous cdma system (TD-SCDMA, Time Division Synchronized Code Division Multiple Access) Long Term Evolution (TD-SCDMA Long Term Evolution, TD-LTE) system cannot carry voice traffic, current a kind of mainstream solution adopts global system for mobile communications (Global System forMobile, Communications, and TD-LTE bimodulus GSM), double-standby terminal, when there being audio call, select GSM carrying.Consider propagation characteristic, future may dispose TD-LTE network at 1880-1920MHz, LTE-TD system in TDD system and between GSM1800 system frequency (1710-1785/1805-1880MHz) be close to (as shown in Figure 1) when coexisting in same terminal, will severe jamming be produced each other.In addition, the 1880-1920MHz TD-SCDMA system in TDD system and the bimodulus of GSM1800, double-standby terminal also have above-mentioned interference problem.
As shown in Figure 1, the reception (descending) of the GSM1800 terminal to adjacent frequency is produced larger interference in the TD-SCDMA of 1880-1920MHz frequency range or the base station of the TD-LTE in future or the transmitting of terminal by TDD system, especially in TD-SCDMA/TD-LTE & GSM1800 dual-mode terminal, due to size restrictions, space isolation less (about 12dB) between two network schemers, the terminal transmission signal of TD-SCDMA/TD-LTE directly will block to fall the Received signal strength of GSM1800, cause GSM1800 cannot receive paging information, broadcast message, and other important control information, cannot normally work.When using TD-SCDMA/TD-LTE network to carry out the business such as web page browsing, if now GSM1800 network has telephone access, may cause terminal cannot normal talking (GSM1800 downlink reception paging information is by the up obstruction that transmits of TD-SCDMA/TD-LTE), this interference can have a strong impact on Consumer's Experience.
Be everlasting at present mobile communication terminal radio-frequency (RF) transceiver in arrange radio-frequency filter isolation realize two coexistence of systems; and radio-frequency filter at least needs about 20MHz transition band just can provide enough protections; but due to two frequency range next-door neighbour frequencies, traditional scheme can not solve the problem that above-mentioned different communication systems coexists preferably.Moreover, the GSM1800 frequency that what China mobile operator had use is 1710-1735/1805-1830MHz, if only for the radio-frequency filter of above-mentioned 2x25MHz Frequency Design terminal, also by cause domestic frequency of utilization section be the terminal roaming of 1710-1735/1805-1830MHz to when using country countries such as () such as Europe of 1735-1785/1830-1880MHz frequency range, signing carrier network cannot be accessed.Therefore, at present for the problem of the band interference of dual-mode terminal, there is no effective solution.
Summary of the invention
Embodiments provide a kind of mobile communication terminal and realize the method that different communication systems coexists, be in the coverage of gsm communication system and tdd communication system adjacent frequency coexistence for solving bimodulus (GSM and TDD) mobile communication terminal, band interference causes the problem of hydraulic performance decline.
A kind of mobile communication terminal that the embodiment of the present invention provides, comprises GSM radio-frequency (RF) transceiver and TDD network radio frequency transceiver, and wherein, the receiving branch of described GSM radio-frequency (RF) transceiver comprises:
Frequency sub-band filter, for filtering out the signal of non-first frequency range under operating state, described first frequency range is a subset of GSM full frequency band and peak frequency is less than the peak frequency of GSM full frequency band;
Full frequency band filter, for filtering out down the signal of non-GSM full frequency band in working order;
Filter device for selection controlling, for when judging that described mobile communication terminal is under the environment of GSM network and TDD network adjacent frequency coexistence, control the work of described frequency sub-band filter, described full frequency band filter does not work.
A kind of method realizing different communication systems and coexist that the embodiment of the present invention provides, comprising:
Mobile communication terminal is judging under the environment self whether being in GSM network and TDD network adjacent frequency coexistence;
If the determination result is YES, the frequency sub-band filter work in self GSM radio-frequency (RF) transceiver receiving branch is controlled and the full frequency band filter in this GSM radio-frequency (RF) transceiver receiving branch does not work; Described frequency sub-band filter is used for filtering out the signal of non-first frequency range in working order, and described first frequency range is a subset of GSM full frequency band and peak frequency is less than the peak frequency of GSM full frequency band; Described full frequency band filter is used for the signal filtering out down non-GSM full frequency band in working order.
The beneficial effect of the embodiment of the present invention comprises:
The mobile communication terminal that the embodiment of the present invention provides and realize the method that different communication systems coexists, the receiving branch of the GSM radio-frequency (RF) transceiver in existing mobile terminal is improved, this receiving branch comprises frequency sub-band filter, full frequency band Filter and Filltering device device for selection controlling, wherein, the first frequency range that frequency sub-band filter is supported is a subset of GSM full frequency band and peak frequency is less than the peak frequency of GSM full frequency band, full frequency band filter support it is the full frequency band of GSM, when filter device for selection controlling judges that mobile communication terminal is under the environment of GSM network and TDD network adjacent frequency coexistence, control the work of frequency sub-band filter, and control full frequency band filter does not work, like this, frequency range between the peak frequency of the first frequency band and GSM full frequency band peak frequency can be made as transition band, avoid the GSM network signal of adjacent frequency and the mutual interference of TDD network signal, ensure normal Standby or work while gsm communication system and tdd communication system in the mobile communication terminal of bimodulus.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the band limits of TD-SCDMA or the TD-LTE network up and down of existing GSM1800 network downstream and 1880-1920MHz frequency range;
The structural representation of the mobile communication terminal that Fig. 2 provides for the embodiment of the present invention;
The structural representation of the filter device for selection controlling that Fig. 3 provides for the embodiment of the present invention;
The flow chart realizing the method that different communication systems coexists that Fig. 4 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the mobile communication terminal that the embodiment of the present invention is provided and the embodiment being realized to the method that different communication systems coexists are described in detail.
The mobile communication terminal that the embodiment of the present invention provides comprises GSM radio-frequency (RF) transceiver and time division duplex (TDD) network radio frequency transceiver simultaneously, the 26S Proteasome Structure and Function of the embodiment of the present invention to the receiving branch of GSM radio-frequency (RF) transceiver wherein improves, as shown in Figure 2, this receiving branch specifically comprises:
Frequency sub-band filter 201, for filtering out the signal of non-first frequency range under operating state, the first frequency range is a subset of GSM full frequency band and peak frequency is less than the peak frequency of GSM full frequency band;
Full frequency band filter 202, for filtering out down the signal of non-GSM full frequency band in working order;
Filter device for selection controlling 203, for when judging that this mobile communication terminal is under the environment of GSM network and TDD network adjacent frequency coexistence, control frequency sub-band filter 201 and work, full frequency band filter 202 does not work.
In the mobile communication terminal that the embodiment of the present invention provides, frequency sub-band filter is configured to the signal filtering out non-first frequency range, this first frequency range is a subset of GSM full frequency band, and, the peak frequency of this subset is less than the peak frequency of GSM full frequency band, the reason of such design is, the scope of the first frequency range that frequency sub-band filter is supported is less than GSM full frequency band, frequency range between the peak frequency of the first frequency band and GSM full frequency band peak frequency as transition band, can avoid the GSM network signal of adjacent frequency and the mutual interference of TDD network signal.
For GSM1800, the scope of the first frequency range can be 1710-1735/1805-1830MHz (frequency range of the GSM that current China GSM carrier uses), and the full frequency band of GSM1800 is 1710-1785/1805-1880MHz, such design, the frequency band of the 50MHz between 1830-1880MHz can be made as the transition band of frequency sub-band filter, can to ensure that the TD-SCDMA (or TD-LTE) of 1880-1920MHz is unlikely to disturb the normal work of GSM1800 terminal with outward leakage signal and block signal.
Specifically, above-mentioned filter device for selection controlling 203, as shown in Figure 3, specifically comprises:
Triggering signal generating apparatus 2031, for when judging that this mobile communication terminal is under the environment of GSM network and TDD network adjacent frequency coexistence, generating the first triggering signal for triggering selection switching device 2032 chooser frequency band filter 201 and sending to selector switch device 2032;
Selector switch device 2032, for when receiving the first triggering signal that triggering signal generating apparatus 2031 sends, connects the radio frequency link that frequency sub-band filter 201 connects, and disconnects the radio frequency link that full frequency band filter 202 connects.
Above-mentioned triggering signal generating apparatus is when judging that current mobile communications terminal is under the environment of GSM network and TDD network adjacent frequency coexistence, in order to avoid band interference between GSM and TDD network, can select to allow frequency sub-band filter 201 enter operating state, like this, can ensure that the signal of TDD can not cause interference to GSM signal.
When mobile communication terminal roams under the environment that GSM and TDD network do not coexist countries and regions such as () such as Europe, in order to meet the demand of mobile communication terminal international roaming, further, in the mobile communication terminal that the embodiment of the present invention provides:
Triggering signal generating apparatus 2031, also for when judging that this mobile communication terminal is not under the environment of GSM network and TDD network adjacent frequency coexistence, generating and select the second triggering signal of full frequency band filter 202 for triggering selection switching device 2032 and send to selector switch device 2032;
Selector switch device 2032, also for when receiving the second triggering signal that triggering signal generating apparatus 2031 sends, connects the radio frequency link that full frequency band filter 202 connects, and disconnects the radio frequency link that frequency sub-band filter 201 connects.
According to above-mentioned design, selector switch device 2032 is when receiving the second triggering signal, can select to allow full frequency band filter 201 enter operating state, like this, under the environment of GSM network and TDD network not adjacent frequency coexistence, the demand of any frequency range in mobile communication terminal access GSM full frequency band can be met, as mobile communication terminal roams to European countries and area (the TDD network with GSM adjacent frequency is not laid by this area) by China, the 1735-1785/1830-1880MHz frequency range that European countries and area use normally can be used.
Preferably, the triggering signal generating apparatus 2031 in the mobile communication terminal that the embodiment of the present invention provides, judged self whether to be in the environment of GSM network and TDD network adjacent frequency coexistence by following mode under:
Judge public land mobile network (the Public Land Mobile Network carried in the system message of the serving BS of mobile communication terminal, PLMN) whether number is consistent with the PLMN number that GSM network is preset, when consistent, judge further again this GSM network whether with TDD network adjacent frequency coexistence, if so, under then judging that described mobile communication terminal is in the environment of GSM network and TDD network adjacent frequency coexistence; Otherwise, then under judging not to be in the environment of GSM network and TDD network adjacent frequency coexistence.
Why need first to judge that whether the PLMN number in the system message of serving BS is consistent with the PLMN number that GSM network is preset, judge that whether this GSM network is network coexisted with TDD again, because existing GSM network comprises GSM900 and GSM1800 two kinds, these two kinds of GSM network may share a PLMN number, only have the frequency range of GSM1800 network can occur that adjacent frequency is disturbed with the TDD network of 1880-1920MHz frequency range at present, in order to avoid erroneous judgement, also need to judge whether this GSM exists adjacent frequency with the TDD network of current existence and disturb further.
Such as triggering signal generating apparatus 2031 judges that the PLMN number carried in the system message of the serving BS of current mobile communications terminal is consistent with the PLMN number of China GSM carrier network, judge so further this carrier network whether with TD-SCDMA or the TD-LTE network adjacent frequency coexistence in TDD network, if, then judge this mobile communication terminal be in the specific network coverage under (namely there is the covering of GSM and the TDD network of adjacent frequency) simultaneously, otherwise, under judging that this mobile communication terminal is not in the environment that simultaneously there is GSM and TDD network.
Preferably, in the mobile communication terminal that the embodiment of the present invention provides, the frequency range supported under frequency sub-band filter 201 operating state is 1710-1735MHz and 1805-1830MHz; The frequency range supported under full frequency band filter 202 operating state is the full frequency band of GSM1800.
Preferably, in the mobile communication terminal that the embodiment of the present invention provides, TDD network comprises the TD-LTE network in TD-SCDMA network or future;
Accordingly, time division duplex network radio-frequency (RF) transceiver is TD-SCDMA or TD-LTE network radio frequency transceiver;
Filter device for selection controlling 203, during specifically for judging that described mobile communication terminal is under the environment of GSM network and TD-SCDMA or TD-LTE network adjacent frequency coexistence, control frequency sub-band filter 201 and work, full frequency band filter 202 does not work.
Based on same inventive concept, the embodiment of the present invention additionally provides a kind of method realizing different communication systems and coexist, the principle of dealing with problems due to the method is similar to aforementioned mobile communication terminal, therefore the enforcement of the method see the enforcement of aforementioned mobile communication terminal, can repeat part and repeats no more.
The embodiment of the present invention also provides a kind of method realizing different communication systems and coexist, and in order to realize realizing GSM and TDD system standby or work simultaneously in same mobile communication terminal simultaneously, the method as shown in Figure 4, specifically comprises the steps:
S401, mobile communication terminal are judging under the environment self whether being in GSM network and TDD network adjacent frequency coexistence; If the determination result is YES, following step S402 is performed; If judged result is no, perform S403;
S402, control the frequency sub-band filter work in self GSM radio-frequency (RF) transceiver receiving branch and the full frequency band filter in this GSM radio-frequency (RF) transceiver receiving branch does not work; Wherein, frequency sub-band filter is used for filtering out the signal of non-first frequency range in working order, and the first frequency range is a subset of GSM full frequency band and peak frequency is less than the peak frequency of GSM full frequency band; Full frequency band filter is used for the signal filtering out down non-GSM full frequency band in working order.
S403, control the full frequency band filter work in self GSM radio-frequency (RF) transceiver receiving branch and the frequency sub-band filter in this GSM radio-frequency (RF) transceiver receiving branch does not work.
Further, in above-mentioned steps S402, control frequency sub-band filter work and control full frequency band filter not work, specifically comprise:
Mobile communication terminal, when judging that described mobile communication terminal is under the environment of GSM network and TDD network adjacent frequency coexistence, generates the first triggering signal of the selector switch device chooser frequency band filter for triggering this mobile communication terminal and sends to this selector switch device;
Selector switch device, when receiving the first triggering signal, connects the radio frequency link that frequency sub-band filter connects, and disconnects the radio frequency link that full frequency band filter connects.
Further, in above-mentioned steps S403, control full frequency band filter work and control frequency sub-band filter not work, specifically comprise:
Mobile communication terminal, when judging under the environment self not being in GSM network and TDD network adjacent frequency coexistence, generates the second triggering signal for triggering selection switching device selection full frequency band filter and sends to this selector switch device;
Selector switch device, when receiving the second triggering signal, connects the radio frequency link that full frequency band filter connects, and disconnects the radio frequency link that frequency sub-band filter connects.
In above-mentioned steps S401, mobile communication terminal realizes especially by following manner under judging self whether to be in the environment of GSM network and TDD network adjacent frequency coexistence:
This mobile communication terminal judges that whether the PLMN number carried in the system message of serving BS is consistent with the PLMN number that GSM network is preset, when consistent, further judge described GSM network whether with TDD network adjacent frequency coexistence, if, under then judging that this mobile communication terminal is in the environment of GSM network and TDD network adjacent frequency coexistence, otherwise, under not being in the environment of GSM network and TDD network adjacent frequency coexistence.
Preferably, in method that different communication systems coexists that what the embodiment of the present invention provided realize, above-mentioned first frequency range is 1710-1735MHz and 1805-1830MHz; Said GSM full frequency band is the full frequency band of GSM1800.
Preferably, in the said method that the embodiment of the present invention provides, TDD network is the TD-LTE network in existing TD-SCDMA network or future, or other and GSM may exist the TDD network that adjacent frequency disturbs.
The mobile communication terminal that the embodiment of the present invention provides and realize the method that different communication systems coexists, the receiving branch of the GSM radio-frequency (RF) transceiver in existing mobile terminal is improved, this receiving branch comprises frequency sub-band filter, full frequency band Filter and Filltering device device for selection controlling, wherein, the first frequency range that frequency sub-band filter is supported is a subset of GSM full frequency band and peak frequency is less than the peak frequency of GSM full frequency band, full frequency band filter support it is the full frequency band of GSM, when filter device for selection controlling judges that mobile communication terminal is under the environment of GSM network and TDD network adjacent frequency coexistence, control the work of frequency sub-band filter, and control full frequency band filter does not work, like this, frequency range between the peak frequency of the first frequency band and GSM full frequency band peak frequency can be made as transition band, avoid the GSM network signal of adjacent frequency and the mutual interference of TDD network signal, ensure normal Standby or work while gsm communication system and tdd communication system in the mobile communication terminal of bimodulus.
Further, the mobile communication terminal that the embodiment of the present invention provides and realize the method that different communication systems coexists, when filter device for selection controlling judges that mobile communication terminal is not under the environment of GSM network and TDD network adjacent frequency coexistence, control the work of full frequency band filter, and control frequency sub-band filter does not work, like this, under the environment of GSM network and TDD network not adjacent frequency coexistence, the demand of any frequency range in mobile communication terminal access GSM full frequency band can be met, as mobile communication terminal roams to European countries with time regional by China, can normally access and use the GSM network in European countries and area.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (12)
1. a mobile communication terminal, comprise GSM radio-frequency (RF) transceiver and TDD network radio frequency transceiver, it is characterized in that, the receiving branch of described GSM radio-frequency (RF) transceiver comprises:
Frequency sub-band filter, for filtering out down the signal of non-first frequency range in working order, described first frequency range is a subset of GSM full frequency band and peak frequency is less than the peak frequency of GSM full frequency band;
Full frequency band filter, for filtering out down the signal of non-GSM full frequency band in working order;
Filter device for selection controlling, for when judging that described mobile communication terminal is under the environment of GSM network and TDD network adjacent frequency coexistence, control the work of described frequency sub-band filter, described full frequency band filter does not work.
2. mobile communication terminal as claimed in claim 1, it is characterized in that, described filter device for selection controlling, specifically comprises:
Triggering signal generating apparatus, for when judging that described mobile communication terminal is under the environment of GSM network and TDD network adjacent frequency coexistence, generating the first triggering signal for triggering selection switching device chooser frequency band filter and sending to selector switch device;
Selector switch device, for when receiving described first triggering signal, connects the radio frequency link that described frequency sub-band filter connects, and disconnects the radio frequency link that described full frequency band filter connects.
3. mobile communication terminal as claimed in claim 2, it is characterized in that, described triggering signal generating apparatus, also for when judging that described mobile communication terminal is not under the environment of GSM network and TDD network adjacent frequency coexistence, generating and select the second triggering signal of full frequency band filter for triggering described selector switch device and send to described selector switch device;
Described selector switch device, also for when receiving described second triggering signal, connects the radio frequency link that described full frequency band filter connects, and disconnects the radio frequency link that described frequency sub-band filter connects.
4. mobile communication terminal as claimed in claim 2 or claim 3, it is characterized in that, described triggering signal generating apparatus, whether consistent with the PLMN number that GSM network is preset specifically for judging the public land mobile network PLMN number carried in the system message of the serving BS of described mobile communication terminal, when consistent, further judge described GSM network whether with TDD network adjacent frequency coexistence, if, under then judging that described mobile communication terminal is in the environment of GSM network and TDD network adjacent frequency coexistence, otherwise, under not being in the environment of GSM network and TDD network adjacent frequency coexistence.
5. the mobile communication terminal as described in any one of claim 1-3, is characterized in that, the frequency range supported under described frequency sub-band filter operating state is 1710-1735MHz and 1805-1830MHz;
The frequency range supported under described full frequency band filter operating state is the full frequency band of GSM1800.
6. the mobile communication terminal as described in any one of claim 1-3, is characterized in that, described time division duplex network radio-frequency (RF) transceiver is TD-SCDMA or TD-LTE network radio frequency transceiver;
Described filter device for selection controlling, during specifically for judging that described mobile communication terminal is under the environment of GSM network and TD-SCDMA or TD-LTE network adjacent frequency coexistence, control the work of described frequency sub-band filter, described full frequency band filter does not work.
7. realize the method that different communication systems coexists, it is characterized in that, comprising:
Mobile communication terminal is judging under the environment self whether being in GSM network and TDD network adjacent frequency coexistence;
If the determination result is YES, the frequency sub-band filter work in self GSM radio-frequency (RF) transceiver receiving branch is controlled and the full frequency band filter in this GSM radio-frequency (RF) transceiver receiving branch does not work; Described frequency sub-band filter is used for filtering out the signal of non-first frequency range in working order, and described first frequency range is a subset of GSM full frequency band and peak frequency is less than the peak frequency of GSM full frequency band; Described full frequency band filter is used for the signal filtering out down non-GSM full frequency band in working order.
8. method as claimed in claim 7, is characterized in that, controls frequency sub-band filter work and control full frequency band filter not work, and specifically comprises:
Described mobile communication terminal, when judging that described mobile communication terminal is under the environment of GSM network and TDD network adjacent frequency coexistence, generates the first triggering signal of the selector switch device chooser frequency band filter for triggering described mobile communication terminal and sends to this selector switch device;
Selector switch device, when receiving described first triggering signal, connects the radio frequency link that described frequency sub-band filter connects, and disconnects the radio frequency link that described full frequency band filter connects.
9. method as claimed in claim 8, is characterized in that, also comprise:
Described mobile communication terminal, when judging that described mobile communication terminal is not under the environment of GSM network and TDD network adjacent frequency coexistence, generates and selects the second triggering signal of full frequency band filter for triggering described selector switch device and send to this selector switch device;
Selector switch device, when receiving described second triggering signal, connects the radio frequency link that described full frequency band filter connects, and disconnects the radio frequency link that described frequency sub-band filter connects.
10. the method as described in any one of claim 7-9, is characterized in that, mobile communication terminal realizes especially by following manner under judging self whether to be in the environment of GSM network and TDD network adjacent frequency coexistence:
Described mobile communication terminal judges that whether the public land mobile network PLMN number carried in the system message of serving BS is consistent with the PLMN number that GSM network is preset, when consistent, further judge described GSM network whether with TDD network adjacent frequency coexistence, if, under then judging that described mobile communication terminal is in the environment of GSM network and TDD network adjacent frequency coexistence, otherwise, under not being in the environment of GSM network and TDD network adjacent frequency coexistence.
11. methods as described in any one of claim 7-9, it is characterized in that, described first frequency range is 1710-1735MHz and 1805-1830MHz; Described GSM full frequency band is the full frequency band of GSM1800.
12. methods as described in any one of claim 7-9, it is characterized in that, described TDD network is TD-SCDMA or TD-LTE network.
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| CN103595438A (en) * | 2013-11-14 | 2014-02-19 | 华为终端有限公司 | Anti-jamming device and method and mobile terminal |
| BR112016028528A8 (en) | 2014-06-16 | 2021-07-13 | Ericsson Telefon Ab L M | radio network entity and method for improving filtering performance in a time division duplexing radio communication system |
| 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 |
| CN106301454A (en) * | 2016-09-26 | 2017-01-04 | 武汉珞光电子有限公司 | A kind of radio frequency receiving and transmitting front end processing system |
| CN109660270A (en) * | 2018-11-21 | 2019-04-19 | 惠州Tcl移动通信有限公司 | A kind of method and mobile terminal reducing the deterioration of SGLTE coupling sensitivity |
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