CN1937816A - Dual-mode mobile communication terminal - Google Patents
Dual-mode mobile communication terminal Download PDFInfo
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- CN1937816A CN1937816A CNA2006101319931A CN200610131993A CN1937816A CN 1937816 A CN1937816 A CN 1937816A CN A2006101319931 A CNA2006101319931 A CN A2006101319931A CN 200610131993 A CN200610131993 A CN 200610131993A CN 1937816 A CN1937816 A CN 1937816A
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Abstract
The invention presents a dual-mode mobile communication terminal which can reduce the mutual interference of the two modes to reach the standby at the same time. It has the first and second mode system to treat the first and second mode signal. The second mode system can generate the interface signal to the first mode system which has the first incepting channel, the first emitting channel and the base-band treating mode of the first mode. The second mode system includes the second incepting channel, the second emitting channel and the base-band treating mode of the second mode. The interfacing inhibit circuit which inhibits the interface signal is set in the first incepting channel and the second emitting channel is set with the stray interfacing inhibit circuit which inhibits the stray interface and the input yawp inhibit .amplifying circuit which inhibit yawp in the first mode signal band and amplify the second mode signal. So it can provide a dual-mode mobile communication terminal which can reach the dual-mode double standby.
Description
Technical field
The present invention relates to radio mobile communication terminal, relate to double-module double-standby radio mobile communication terminal (being designated hereinafter simply as dual-mode handset) especially.
Background technology
Have the various wireless communication pattern at present all over the world, corresponding with it, on the market there being much the cell phone of existing single wireless communications mode, comprises GSM mobile handset, CDMA mobile phone, PHS mobile phone, WLAN mobile phone and 3G mobile etc.These single mode mobile phones are limited by the coverage of its corresponding wireless communication system, in order to solve roaming and the switching between the different mode, bimodulus or multi mode terminal have occurred.Occurred dual-mode handsets such as most of dual-mode handsets such as CDMA/GSM, GSM/PHS, GSM/Wi-Fi in the market, yet these dual-mode handsets at a time all can only there be a kind of pattern in work, rather than dual-standby handset truly.The distinctive feature of wireless communications mode is, is operated in the specific frequency range, carries out signal in the space and propagates, and is subject to the interference of other wireless mode signal.Yet, when any two kinds of wireless modes are spatially relatively more close or when working frequency range leaned on very closely, the phase mutual interference between their signals became seriously, cause the signal to noise ratio severe exacerbation of system, make it can't satisfy its basic communication performance separately.This also is the main cause that present dual-mode handset can only be accomplished single standby.
In order to realize dual-mode and dual-idle mobile phone truly, the interference problem between two kinds of patterns of this dual-mode handset of necessary solution.
Summary of the invention
The present invention is intended to propose a kind ofly reduce phase mutual interference between two kinds of patterns to realize the bimodule mobile communication terminal of standby simultaneously in view of the above problems.
Bimodule mobile communication terminal of the present invention, possess respectively first modular system and second modular system that first mode signal and second mode signal are handled, described second modular system produces interference signal to described first modular system, wherein, described first modular system has first receive path, first transmission channel and control first receive path and the first pattern baseband processing module of first transmission channel, described second modular system has second receive path, second transmission channel and the second pattern baseband processing module of controlling described second receive path and described second transmission channel, it is characterized in that
The codan (corresponding to GSM codan C300) that described interference signal is suppressed further is set in described first receive path,
In described second transmission channel, further be provided with and described second mode signal is carried out clutter interference that clutter interference suppresses suppress circuit (suppressing circuit G400) and suppress to drop on the noise in the described first mode signal frequency range and the input noise that described second mode signal carries out processing and amplifying suppressed amplifying circuit (input noise suppresses GSM amplifying circuit G500) corresponding to the GSM clutter interference.
Thus, utilize above-mentioned codan and the above-mentioned clutter interference in second modular system in first modular system to suppress circuit and input noise inhibition amplifying circuit, can effectively suppress the interference that second modular system produces first modular system, therefore, can provide the mode mobile terminal that disturbs between two kinds of patterns of a kind of effective inhibition.
Best, codan possesses: interfere with the special use of selecting for use under the situation of first mode signal in interference signal and disturb the non-special use interference of selecting for use under the situation that suppresses module and do not interfere with first mode signal in interference signal to suppress module, select special-purpose interference inhibition module or non-special-purpose the interference to suppress module according to the disturbed condition that monitors of the first pattern baseband processing module.
Best, it is filter that special-purpose interference suppresses module, and it is the passage of short circuit that non-special-purpose interference suppresses module.
Best, clutter interference suppresses circuit to be possessed: special-purpose clutter interference suppresses module and non-special-purpose clutter interference suppresses module, and the size of the baseband output signal that monitors according to the second pattern baseband processing module selects special-purpose spuious dried inhibition module or non-special-purpose clutter interference to suppress module.
Best, it is filter that special-purpose clutter interference suppresses module, and it is the passage of short circuit that non-special-purpose clutter interference suppresses module.
Best, input noise suppresses amplifying circuit and comprises that first amplifier, second amplifier and level are associated in the filter between first amplifier and second amplifier, filter is used for suppressing to drop on the noise of the first mode signal frequency range, and first amplifier and second amplifier are used to amplify first mode signal.
Best, the first pattern front end of emission is adjusted gain mode according to the control from baseband processing module.
Best, first pattern is a cdma system, and second pattern is a gsm system.
Best, first pattern is the PHS system, and second pattern is a gsm system.
Best, first pattern is a gsm system, and second pattern is the PHS system.
This shows,, can realize to suppress the mode mobile terminal that disturbs between two kinds of patterns by applying the present invention to the mode mobile terminal of various combinations such as CDMA/GSM, PHS/GSM.
Description of drawings
Fig. 1 is the structural representation that summary is represented the CDMA/GSM dual-mode handset of an embodiment of the present invention.
Fig. 2 is the structural representation of the codan C300 in the CDMA/GSM dual-mode handset.
Fig. 3 is the structural representation that the clutter interference in the CDMA/GSM dual-mode handset suppresses circuit G400.
Fig. 4 is the structural representation that the input noise in the CDMA/GSM dual-mode handset suppresses amplifying circuit G500.
Fig. 5 a, Fig. 5 b are used to represent to utilize codan C300 to carry out GSM to disturb the effect schematic diagram that suppresses.
Fig. 6 a, Fig. 6 b are used to represent to utilize clutter interference to suppress circuit G400 to carry out the effect schematic diagram that the GSM clutter interference suppresses.
Fig. 7 a, Fig. 7 b are used to represent to utilize input noise to suppress amplifying circuit G500 to carry out the effect schematic diagram that input noise suppresses and the GSM signal amplifies.
Fig. 8 is the schematic diagram of the situation of the emission that is used for the representing CDMA/GSM dual-mode handset gsm system reception of disturbing cdma system.
In conjunction with the drawings better embodiment is described in detail, above-mentioned feature of the present invention and advantage will become apparent.Following detailed description and accompanying drawing only are illustrative nature to the present invention, are not to be used for limiting its scope, and scope of the present invention is limited by claims and equivalents thereof.
Embodiment
Below, be example with the CDMA/GSM dual-mode handset, describe for the embodiment of dual-mode handset of the present invention with reference to Fig. 1～Fig. 8.And, be that the interference of launching the CDMA reception with GSM in the CDMA/GSM dual-mode handset is that example describes in the following description.
CDMA/GSM dual-mode handset of the present invention has separate radio-frequency module, the baseband module of two covers.The GSM emission shows as the interference that CDMA receives: during the GSM emission, the GSM useful signal receives CDMA and causes interference, causes that cdma receiver increases the weak signal demodulation bit error rate from cdma base station, and promptly the CDMA receiving sensitivity descends.This cause of interference is when the GSM transmit signal strength is far above the cdma base station transmit signal strength in the terminal that arrives cdma receiver, can causes the CDMA weak signal to be launched strong signal by GSM and fall into oblivion.
Fig. 8 is the schematic diagram of the situation of the emission of the expression gsm system reception of disturbing cdma system.As shown in Figure 8, when dual-mode handset during simultaneously away from GSM base station and cdma base station, in order to communicate by letter with the GSM base station maintain, the GSM emission of dual-mode handset need be launched with more high-power, simultaneously since the CDMA signal strength signal intensity that dual-mode handset, arrives cdma receiver also away from cdma base station a little less than, when disturbing when taking place, may cause the cdma communication quality to descend, when serious call drop can take place.
In order to solve the situation that this communication quality descends, as shown in Figure 1, radio-frequency front-end at existing dual-mode handset promptly disturbs the transmission channel of side gsm system to increase GSM spuious inhibition circuit G400 and input noise inhibition amplifying circuit G500, is the receive path increase GSM codan C300 of cdma system in disturbed side.
Below, the structure of the CDMA/GSM dual-mode handset of present embodiment is described with reference to Fig. 1～Fig. 7.
As shown in Figure 1, the CDMA/GSM dual-mode handset of present embodiment has cdma system, the gsm system of respectively CDMA signal, GSM signal being handled.
At first, in cdma system, possess antenna C100, duplexer C200, GSM codan C300, CDMA front end of emission C400, CDMA receiving front-end C500 and CDMA baseband system C600, wherein, constitute receive path by GSM codan C300, CDMA receiving front-end, C400 constitutes transmission channel by the CDMA front end of emission.Particularly, CDMA useful signal and the GSM interference signal from cdma base station is coupled to CDMA transmission/reception duplexer C200 by CDMA antenna C100.By CDMA transmission/reception duplexer C200 separation of C DMA transmit Tx and received signal Rx and said GSM interference signal and with received signal Rx and said GSM interference signal deliver to GSM codan C300, the Tx that will transmit delivers to CDMA front end of emission C400.GSM codan C300 suppresses the said GSM interference signal and above-mentioned received signal Rx is delivered to CDMA receiving front-end C500, by CDMA receiving front-end C500 this received signal Rx is handled, launches.In addition, by CDMA front end of emission C400 to the above-mentioned Tx of transmitting amplify, Frequency mixing processing.
Here, in above-mentioned cdma system, CDMA baseband system C600 not only finishes the emission receiving baseband signal work of treatment of CDMA, and, the further situation of the interference signal in the monitoring of CDMA system, and control the gain mode of the action of GSM codan C300 and control CDMA front end of emission C400 with the optimization receptivity according to this supervisions result.
Secondly, in the gsm system, have transmit-receive switch G200, GSM receiving front-end G300, GSM clutter interference inhibition circuit G400, input noise inhibition GSM amplifying circuit G500 and GSM baseband system G600, wherein, G300 constitutes receive path by the GSM receiving front-end, is suppressed GSM amplifying circuit G500 and is constituted transmission channel by GSM clutter interference inhibition circuit G400, input noise.Particularly, by transmit Tx and received signal Rx from the GSM base station that transmit-receive switch G200 separate antenna G100 receives, GSM receiving front-end G300 will amplify from the received signal Rx of described transmit-receive switch G200, mixing.Above-mentioned input noise suppresses GSM amplifying circuit G500 and is used to realize the inhibition of input noise and amplifies the GSM signal, the said GSM clutter interference suppresses circuit G400 and suppresses according to the emission of finishing the GSM signal from the control of described GSM baseband system G600 and clutter interference, to reduce the interference to cdma system.
Here, said GSM baseband system G600 not only finishes base band signal process, and further detects baseband output signal, and, suppress the action of circuit G400 according to the strength control GSM clutter interference of detected baseband output signal.
Then, concrete structure and the action that suppresses GSM amplifying circuit G500 for GSM codan C300, GSM clutter interference inhibition circuit G400 and input noise as feature of the present invention is elaborated.
Fig. 2 is the structural representation of GSM codan C300 in the CDMA/GSM dual-mode handset.
As shown in Figure 2, GSM codan C300 is made up of four submodules: radio-frequency (RF) switch C310, radio-frequency (RF) switch C330, the special-purpose interference of GSM suppress module C320 and special-purpose interference of non-GSM suppressed module C340.Wherein, radio-frequency (RF) switch C310, radio-frequency (RF) switch C330 are controllable, low Insertion Loss radio-frequency (RF) switch, be used for selecting special-purpose interference inhibition module C320 of GSM or special-purpose interference of non-GSM to suppress module C340 according to detected signal strength signal intensity of CDMA baseband system C600 and frame error rate (FER), promptly select special-purpose interference of GSM to suppress module C320 under to the situation of the interference effect CDMA receptivity of CDMA monitoring GSM, under all the other situations, select non-dedicated GSM to disturb and suppress module C340.Here, GSM is special-purpose to be disturbed and suppresses module C320 be used to decay interference signal from the GSM side, improves system signal noise ratio, keeps the communication quality of CDMA link under the disturbance state.The special-purpose interference of non-GSM suppressed the passage that module C340 comes down to direct short circuit, not having to select special-purpose interference of non-GSM to suppress module C340 under the situation about disturbing, can improve the receiving sensitivity of cdma system, optimizes its receptivity.
Fig. 5 a, Fig. 5 b are used to utilize GSM codan C300 to carry out GSM disturb the effect schematic diagram that suppresses.Represented that in Fig. 5 a, Fig. 5 b disturbed side (CDMA side) utilizes special-purpose interference of said GSM to suppress module C320 disturbs inhibition to the GSM interference signal of coming self-interference side (GSM side) a embodiment.Disturbing inhibition module C320 to make by the CDMA useful signal and to input GSM interference signal the said GSM special use decays.Fig. 5 a is the outer GSM interference signal of the special-purpose CDMA frequency acceptance band that disturbs inhibition module C320 input to import of GSM and the schematic diagram of CDMA useful signal combination.Fig. 5 b is that composite signal shown in Fig. 5 a is by the special-purpose schematic diagram that suppresses module C320 output signal afterwards that disturbs of said GSM.By Fig. 5 a, 5b as can be known, the GSM interference signal has obtained very high attenuation after special-purpose interference suppresses module C320 by GSM.Fig. 5 a, Fig. 5 b have only represented at the embodiment in certain frequency band under the CDMA/GSM pattern situation, in actual design, should be according to the different radio pattern, at the frequency planning in country variant, area, specifically use configuring condition, the special-purpose inhibition module C320 that disturbs of corresponding frequency switch C310, C330 and GSM is selected, designed to disturbed condition between the concrete analysis bimodulus to suppress the GSM interference and to make its insertion loss to the CDMA received signal less.Suppress module C320 as special-purpose interference of GSM, can select that low pass, band are logical for use, high pass or band stop filter.
Fig. 3 is the structural representation that the GSM clutter interference in the CDMA/GSM dual-mode handset suppresses circuit G400.As shown in Figure 3, GSM clutter interference inhibition circuit G400 is made up of four submodules: radio-frequency (RF) switch G410, radio-frequency (RF) switch G430, the special-purpose clutter interference of GSM suppress module G420 and the special-purpose clutter interference of non-GSM suppresses module G440.The frequency characteristic that the special-purpose clutter interference of GSM suppresses module G420 is the transmit frequency band of GSM, and above-mentioned dedicated GSM interference inhibition module C320 is that CDMA receives frequency range.Its operation principle is, when cdma system detects FER when big, notify GSM baseband system G600 to detect the baseband transmission output signal of GSM simultaneously under the situation of notice GSM codan C300, select special-purpose clutter interference inhibition module G420 of GSM or the special-purpose clutter interference of non-GSM to suppress module G440 according to the result who detects then.Generally be in high transmit power, select the special-purpose clutter interference of GSM to suppress module G420 with the spurious signal in the filtering CDMA reception frequency range, reduction is to the interference of CDMA, in low transmitting power, select the special-purpose clutter interference of non-GSM to suppress module G440, improve the efficient of whole transmission channel to reduce the insertion loss on the link.
Fig. 6 a, Fig. 6 b are that expression utilizes the GSM clutter interference to suppress the effect schematic diagram that circuit G400 carries out the inhibition of GSM clutter interference.Represented that in Fig. 6 a, Fig. 6 b interference side (GSM side) utilizes the special-purpose clutter interference of GSM to suppress the frequency response that module G420 carries out the example that clutter interference suppresses.The special-purpose clutter interference of said GSM suppresses module G420 and does to become by the GSM useful signal and to the clutter interference signal in the CDMA frequency band to carry out algorithm.Fig. 6 a is the interior GSM clutter interference signal of the CDMA frequency acceptance band of the special-purpose clutter interference inhibition of this GSM module G420 input input and the schematic diagram of GSM useful signal combination.To be composite signal shown in Fig. 6 a suppress the schematic diagram of the output signal behind module G420 by the special-purpose clutter interference of this GSM to Fig. 6 b.By Fig. 6 a, Fig. 6 b as can be known, GSM clutter interference signal has obtained very high attenuation after special-purpose clutter interference suppresses module G420 by GSM.Fig. 6 a, Fig. 6 b have only represented at the embodiment in certain frequency band under the CDMA/GSM pattern situation, in actual design, should be according to the different radio pattern, at the frequency planning in country variant, area, specifically use configuring condition, disturbed condition between the concrete analysis bimodulus, radio-frequency (RF) switch G410 that select, the accordingly low Insertion Loss of design is penetrated and the special-purpose clutter interference of G430, GSM suppress module G420 to suppress the GSM clutter interference and to make the insertion loss of GSM transmission signal less.Suppress module G420 as the special-purpose clutter interference of GSM, can select that low pass, band are logical for use, high pass or band stop filter.
Fig. 4 is the structural representation that the input noise in the gsm system of CDMA/GSM dual-mode handset suppresses GSM amplifying circuit G500.
As shown in Figure 4, input noise inhibition GSM amplifying circuit G500 is made of the noise suppression module G520 that amplifier G510, amplifier G530 and level are associated between them.Noise suppression module G520 is the band pass filter of GSM transmit frequency band, and it has very high inhibition to the noise of the reception frequency range of CDMA, thus, drops on the noise that CDMA receives frequency range in the time of can being suppressed at the high-power emission of GSM.Though this noise has no idea to eliminate fully, can decay is suppressed to an acceptable degree.
Fig. 7 a, Fig. 7 b are that expression utilizes input noise to suppress the effect schematic diagram that GSM amplifying circuit G500 carries out noise suppressed and the amplification of GSM signal.Fig. 7 a is the input GSM signal of above-mentioned noise suppression module G520 and the noise signal in the CDMA frequency band thereof.Fig. 7 b is the schematic diagram of noise in the GSM signal of output of this noise suppression module G520 and the CDMA frequency band.Noise suppression module G520 can pass through the GSM useful signal, and the noise in the CDMA frequency band is had very high inhibition.By Fig. 7 a, Fig. 7 b as can be known, the phase noise in the CDMA frequency band after through amplifier G510 and G530 far away from the GSM signal after amplifying.In other words, noise has obtained bigger inhibition decay.Fig. 7 a, Fig. 7 b only specify the embodiment of bimodulus pattern in certain frequency band for work of the present invention, in actual design, should be according to the different radio pattern, at the frequency planning in country variant, area, specifically use configuring condition, disturbed condition between the concrete analysis bimodulus, the frequency band and the inhibition situation of selection, the corresponding noise inhibiting wave filter of design.
In the structure that preamble is described, above-mentioned CDMA baseband system C600 is by monitoring the interior GSM of dual-mode handset to the CDMA disturbed condition, C300 suppresses the mode of interference and the gain mode of CDMA receiving radio frequency front end C500 according to this disturbed condition control GSM codan, to optimize the CDMA receptivity.Simultaneously, above-mentioned CDMA baseband system C600 also sends control information to GSM baseband system G600, GSM baseband system G600 controls the work that the GSM clutter interference suppresses circuit G400 according to the information that above-mentioned control information and detection GSM base band transmit from cdma system obtain, and adjusts the GSM transmission signal quality.
In sum, utilize said structure, can realize that the CDMA/GSM dual-mode handset works on separately the network simultaneously, seamlessly transit for gsm system and two kinds of communication systems of CDMA provide.Thus, can provide a kind of dual-mode and dual-idle mobile phone that disturbs between two kinds of patterns that alleviates.
Though, in the above description only for applying the present invention to the CDMA/GSM dual-mode handset and being that the situation that the GSM emission disturbs CDMA to receive has been done to specify, yet, similarly also can apply the present invention in the dual-mode handset of other type, for example, be applied under the situation of GSM/PHS dual-mode handset, if the GSM emission disturbs PHS to receive, then the circuit of gsm system increases GSM codan module simultaneously with above-mentioned execution mode on the PHS receive path; If the PHS emission disturbs GSM to receive, then increase PHS codan module at the GSM receive path, increase the PHS clutter interference at the PHS transmission channel and suppress circuit module.
More than; with reference to accompanying drawing the specific embodiment of the present invention specific descriptions have been made; yet; those skilled in the art are to be understood that; do not departing under spirit of the present invention and the situation by the protection range that claims limited, those skilled in the art can also do various modifications to situation given in the embodiment.For example each module is carried out that function is replaced or each device is made up or discrete, and the known improvement of those skilled in that art, within the claim that all should still belong to patent of the present invention contains.
Claims (10)
1. bimodule mobile communication terminal, possess respectively first modular system and second modular system that first mode signal and second mode signal are handled, described second modular system produces interference signal to described first modular system, wherein, described first modular system has first receive path, first transmission channel and control first receive path and the first pattern baseband processing module of first transmission channel, described second modular system has second receive path, second transmission channel and the second pattern baseband processing module of controlling described second receive path and described second transmission channel, it is characterized in that
The codan (C300) that described interference signal is suppressed further is set in described first receive path,
In described second transmission channel, further be provided with and described second mode signal is carried out clutter interference that clutter interference suppresses suppress circuit (G400) and suppress to drop on the noise in the described first mode signal frequency range and the input noise that described second mode signal carries out processing and amplifying suppressed amplifying circuit (G500).
2. bimodule mobile communication terminal as claimed in claim 1 is characterized in that,
Described codan (C300) possesses: interfere with the special use of selecting for use under the situation of first mode signal in described interference signal and disturb non-special-purpose interference of selecting for use under the situation that suppresses module (C320) and do not interfere with first mode signal in described interference signal to suppress module (C340)
The described first pattern baseband processing module (C600) is monitored above-mentioned interference signal, and according to select described special-purpose interference inhibition module (C320) or non-special-purpose the interference to suppress module (C340) according to the size of the above-mentioned interference signal that monitors.
3. bimodule mobile communication terminal as claimed in claim 2 is characterized in that,
It is filter that described special-purpose interference suppresses module (C320), and it is the passage of short circuit that described non-special-purpose interference suppresses module (C340).
4. bimodule mobile communication terminal as claimed in claim 1 is characterized in that,
Described clutter interference suppresses circuit (G400) to be possessed: special-purpose clutter interference suppresses module (G420) and non-special-purpose clutter interference suppresses module (G440),
The described second pattern baseband processing module (G600) is monitored the size of the baseband output signal of second modular system, and selects special-purpose spuious dried inhibition module (G420) or non-special-purpose clutter interference to suppress module (G440) according to the size of the output signal that monitors.
5. bimodule mobile communication terminal as claimed in claim 4 is characterized in that,
It is filter that described special-purpose clutter interference suppresses module (G420), and it is the passage of short circuit that described non-special-purpose clutter interference suppresses module (G440).
6. bimodule mobile communication terminal as claimed in claim 1 is characterized in that,
Described input noise suppresses amplifying circuit (G500) and comprises that first amplifier (510), second amplifier (G530) and level are associated in the filter (G520) between described first amplifier (510) and second amplifier (G530),
Described filter (G520) is used for suppressing to drop on the noise of the described first mode signal frequency range,
Described first amplifier (510) and second amplifier (G530) are used to amplify first mode signal.
7. bimodule mobile communication terminal as claimed in claim 1 is characterized in that,
In described first receive path, include first front end of emission (C400),
The described first pattern front end of emission (C400) is adjusted gain mode according to the control from described baseband processing module (C600).
8. as any described bimodule mobile communication terminal of claim 1～7, it is characterized in that,
Described first pattern is a cdma system, and described second pattern is a gsm system.
9. bimodule mobile communication terminal as claimed in claim 1 is characterized in that,
Described first pattern is the PHS system, and described second pattern is a gsm system.
10. bimodule mobile communication terminal as claimed in claim 1 is characterized in that,
Described first pattern is a gsm system, and described second pattern is the PHS system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101319931A CN1937816A (en) | 2006-10-20 | 2006-10-20 | Dual-mode mobile communication terminal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101319931A CN1937816A (en) | 2006-10-20 | 2006-10-20 | Dual-mode mobile communication terminal |
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| CN1937816A true CN1937816A (en) | 2007-03-28 |
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| CNA2006101319931A Pending CN1937816A (en) | 2006-10-20 | 2006-10-20 | Dual-mode mobile communication terminal |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101577984A (en) * | 2008-05-07 | 2009-11-11 | 德信无线通讯科技（北京）有限公司 | Method for reducing interference in transmission at a CDMA frequency band from WCDMA frequency band in double-mode mobile phone |
| CN102077630A (en) * | 2008-05-02 | 2011-05-25 | 株式会社Ntt都科摩 | Communication system, communication device, and communication method |
| CN103262618A (en) * | 2010-12-10 | 2013-08-21 | 华为技术有限公司 | System and method for interference control in simultaneous transmission systems |
| CN104779965A (en) * | 2014-01-13 | 2015-07-15 | 联想(北京)有限公司 | Anti-interference device and method for double-mode electronic equipment |
| CN108923798A (en) * | 2018-06-28 | 2018-11-30 | 努比亚技术有限公司 | Mobile terminal and its spuious filtering method |
-
2006
- 2006-10-20 CN CNA2006101319931A patent/CN1937816A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102077630A (en) * | 2008-05-02 | 2011-05-25 | 株式会社Ntt都科摩 | Communication system, communication device, and communication method |
| CN102077630B (en) * | 2008-05-02 | 2014-09-17 | 株式会社Ntt都科摩 | Communication system, communication device, and communication method |
| CN101577984A (en) * | 2008-05-07 | 2009-11-11 | 德信无线通讯科技（北京）有限公司 | Method for reducing interference in transmission at a CDMA frequency band from WCDMA frequency band in double-mode mobile phone |
| CN103262618A (en) * | 2010-12-10 | 2013-08-21 | 华为技术有限公司 | System and method for interference control in simultaneous transmission systems |
| CN104779965A (en) * | 2014-01-13 | 2015-07-15 | 联想(北京)有限公司 | Anti-interference device and method for double-mode electronic equipment |
| CN108923798A (en) * | 2018-06-28 | 2018-11-30 | 努比亚技术有限公司 | Mobile terminal and its spuious filtering method |
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