CN101043227A - Multi-mode mobile communication terminal and its RF receiving and transmitting circuit, method - Google Patents
Multi-mode mobile communication terminal and its RF receiving and transmitting circuit, method Download PDFInfo
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- CN101043227A CN101043227A CNA2007100959259A CN200710095925A CN101043227A CN 101043227 A CN101043227 A CN 101043227A CN A2007100959259 A CNA2007100959259 A CN A2007100959259A CN 200710095925 A CN200710095925 A CN 200710095925A CN 101043227 A CN101043227 A CN 101043227A
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Abstract
The invention discloses a multimode mobile communication terminal and radio frequency receiving and sending circuit and method, by setting corresponding bandwidth filter at the receiving and sending end of every communication module in multi mode communication terminal, interference of the radio frequency signal emitted by one sending end of communication module to the receiving signal of the other communication module can be decreased greatly, the communication quality of multimode mobile communication terminal can be increased.
Description
Technical field
The present invention relates to moving communicating field, especially relate to a kind of multimode mobile communication terminal and radio frequency reception thereof and radiating circuit, method.
Background technology
At moving communicating field, in numerous standards and network coexisted today, can be applied at least two communication systems, be applicable to that the double-mode communication terminal of at least two kinds of communication patterns can provide smooth excessiveness for the differentiation of each communication system of coexistence.The user who uses double-mode communication terminal not only can be easily adopt different system all over the world between roam, and according to the speech quality and the charging way of different system switch at any time better, more cheap network.We can say that double-mode communication terminal combines all advantages of two kinds of network technologies, therefore have very big market prospects.
Occurred some multimode mobile communication terminals now on the market, for example, Fig. 1 shows a kind of existing double-mode communication terminal.It includes two basic communication modules, and wherein, one is the gsm communication module, and another basic communication module is DCS.Two modules standbies simultaneously and communicating.This mobile communication terminal is selectable to work in a kind of of single GSM pattern (being first communication module work), single DCS pattern (being second communication module work) or GSM/DCS double mode (being that first communication module and second communication module are worked simultaneously).Wherein, this double-mode communication terminal of the double mode expression of GSM/DCS under GSM and DCS two-mode simultaneously at net.Herein " at net " comprises standby and communications status, and communications status be meant the transmitting-receiving note, connect make a phone call, transfer of data and enjoy the active state that other value-added services etc. take network.When the standby simultaneously of two kinds of patterns, the working frequency range of the two kinds of mode signals distance of being separated by no matter, because single mode communication terminal and subsidiary communications module card are positioned at same housing, and the dual-mode antenna of two-mode works simultaneously, therefore all is difficult to avoid two kinds of radio frequency cross between the mode signal to disturb.To be example among this Fig. 1, the radio frequency cross of above-mentioned two kinds of mode signals is disturbed the following four kinds of situations that mainly comprise:
When (1) GSM launches (when first communication module is handled emission state), GSM transmits to the interference of DCS received signal;
When (2) DCS launches (when second communication module is handled emission state), DCS transmits to the interference of GSM received signal;
(3) GSM emission, reception and idle condition, the interference that spurious emissions signal (spurious emissions) receives DCS;
(4) DCS emission, reception and idle condition, the interference that the spurious emissions signal receives GSM.
In above-mentioned four kinds of situations, for (3), (4), because the spurious emissions signal is with respect to useful signal, transmitting power is very little, and the interference that causes is also very little, so do not do consideration at this.For situation (1),, can cause the DCS weak signal to be fallen into oblivion by the strong signal of GSM when the GSM transmit signal strength that is coupled into the DCS receiver during far above DCS base station transmit signals intensity.The interference that GSM transmits to the DCS received signal can cause that the DCS receiver increases the demodulation bit error rate of the useful weak signal of DCS, and promptly the DCS receiving sensitivity descends.For (2),, can cause the GSM weak signal to be fallen into oblivion by the strong signal of DCS when the DCS transmit signal strength that is coupled into the GSM receiver during far above GSM base station transmit signals intensity.The interference that DCS transmits to the GSM received signal can cause that the GSM receiver increases the demodulation bit error rate of the useful weak signal of GSM, and promptly the GSM receiving sensitivity descends.In a word, transmitting of one of them communication module may produce interference to the received signal of another communication module.
Therefore, at multi-mode communication terminal, particularly in the communication terminal of multi-mode standby simultaneously, a kind of pattern interference to another kind of pattern received signal become to attach most importance to problem of needs solution that transmits.
Summary of the invention
In view of this, embodiment of the invention technical problem to be solved is, a kind of multimode mobile communication terminal and radio frequency reception thereof and radiating circuit, method are provided, can reduce a kind of pattern transmitting terminal radio frequency transmissions in the mobile communication terminal effectively the interference of another kind of pattern received signal.
For solving the problems of the technologies described above, a kind of multimode mobile communication terminal of the embodiment of the invention comprises at least two communication modules, and wherein at least one communication module comprises:
Antenna;
The duplexer that is connected with described antenna;
Be used to receive radio frequency receiver from the radiofrequency signal of antenna;
Be used to send the radiofrequency launcher of radiofrequency signal;
Be used to amplify radio frequency amplifier from the radiofrequency signal to be sent of radiofrequency launcher;
The baseband processing module that is connected respectively with described radio frequency receiver and radiofrequency launcher;
Be connected the receiving terminal filter between described duplexer and the described radio frequency receiver, the radiofrequency signal that is received that is used for decaying receives the outer signal of frequency range; And
Be connected the sending filter between described duplexer and the described radio frequency amplifier, the radiofrequency signal that is used for decaying to be sent sends the outer signal of frequency range.
Preferably, described receiving terminal filter is in series at least two, and each receiving terminal filter is the band pass filter corresponding to the band downlink of respective communication pattern.
Preferably, described transmitting terminal filter is the band pass filter corresponding to the uplink band of respective communication pattern.
Preferably, described two communication patterns are any one or two kinds among GSM850, GSM900, PCS, DCS, PHS, CDMA2000, WCDMA, TD-SCDMA, the WiFi.
A kind of multimode mobile communication terminal radio-frequency (RF) receiving circuit of the embodiment of the invention comprises:
Antenna;
The duplexer that is connected with described antenna;
Be used to receive radio frequency receiver from the radiofrequency signal of antenna;
The baseband processing module that is connected with described radio frequency receiver;
Be connected the receiving terminal filter between described duplexer and the described radio frequency receiver, the radiofrequency signal that is received that is used for decaying receives the outer signal of frequency range.
Preferably, described receiving terminal filter is in series at least two, and each receiving terminal filter is the band pass filter corresponding to the band downlink of respective communication pattern.
Preferably, described respective communication pattern be among GSM850, GSM900, PCS, DCS, PHS, CDMA2000, WCDMA, TD-SCDMA, the WiFi any one.
A kind of multimode mobile communication terminal radio-frequency transmissions circuit of the embodiment of the invention comprises:
Antenna;
The duplexer that is connected with described antenna;
Be used to send the radiofrequency launcher of radiofrequency signal;
Be used to amplify radio frequency amplifier from the radiofrequency signal to be sent of radio-frequency (RF) transceiver;
The baseband processing module that is connected with described radiofrequency launcher;
Be connected the sending filter between described duplexer and the described radio frequency amplifier, the radiofrequency signal that is used for decaying to be sent sends the outer signal of frequency range.
Preferably, described transmitting terminal filter is the band pass filter corresponding to the uplink band of respective communication pattern.
Preferably, described respective communication pattern be among GSM850, GSM900, PCS, DCS, PHS, CDMA2000, WCDMA, TD-SCDMA, the WiFi any one.
A kind of multimode mobile communication terminal radio frequency receiving method of the embodiment of the invention comprises:
Reception is from the radiofrequency signal corresponding to a communication pattern of antenna;
Radiofrequency signal to described reception is carried out attenuation processing, and decaying, it receives the outer signal of frequency range;
Radiofrequency signal after attenuation processing is passed to baseband processing module.
Preferably, the described step that the radiofrequency signal that receives is carried out attenuation processing is specially:
Adopt the band pass filter of the band downlink of corresponding described communication pattern, the radiofrequency signal of described reception is carried out filtration treatment.
Preferably, described communication pattern be among GSM850, GSM900, PCS, DCS, PHS, CDMA2000, WCDMA, TD-SCDMA, the WiFi any one.
A kind of multimode mobile communication terminal radio frequency receiving method of the embodiment of the invention comprises:
Radiofrequency signal to be sent from correspondence one communication pattern of baseband processing module is amplified;
Described radiofrequency signal to be sent is carried out attenuation processing, the outer signal of its transmit frequency band of decaying;
Radiofrequency signal after attenuation processing is launched through antenna.
Preferably, described step of carrying out attenuation processing to sent radiofrequency signal is specially:
Adopt the band pass filter of the uplink band of corresponding described communication pattern, described radiofrequency signal to be sent is carried out filtration treatment.
Preferably, described respective communication pattern be among GSM850, GSM900, PCS, DCS, PHS, CDMA2000, WCDMA, TD-SCDMA, the WiFi any one.
The multimode mobile communication terminal of the enforcement embodiment of the invention and radio frequency reception thereof and radiating circuit, method, with transmitting terminal a corresponding band pass filter is set by receiving terminal in each communication module of multimode mobile communication terminal, can effectively reduce the transmitting of one of them communication module, improve the communication quality of multimode mobile communication terminal the interference of the received signal of another communication module.
Description of drawings
Fig. 1 is the structural representation of existing multimode mobile communication terminal;
Fig. 2 is the structural representation of first embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing preferred embodiment of the present invention is described.
As shown in Figure 2, be the structural representation of the first embodiment of the present invention.Described mobile communication terminal is a multi-module mobile terminal, it includes at least two communication modules (there is shown two), be operated in respectively under the different patterns, this two different pattern can be such as any two kinds in GSM850, GSM900, PCS, DCS, PHS, CDMA2000, WCDMA, TD-SCDMA, these patterns of WiFi.Do at GSM850 with the first communication module formula below, and second communication module is operated in DCS and describes for example down.
Each communication module includes among the figure:
Be used to receive and launch the antenna of different mode radiofrequency signal, this antenna can be a plurality of, perhaps adopts integrated dual-mode/multi-mode antenna;
With the duplexer that described antenna is connected, be used to select respective antenna to launch or receive, also can be called as duplexer;
Radio frequency receiver is used to receive the radiofrequency signal from antenna;
Radiofrequency launcher is used to send radiofrequency signal to be sent.
Radio frequency amplifier is used to amplify the radiofrequency signal to be sent from radio-frequency (RF) transceiver;
The baseband processing module that is connected respectively with described radio-frequency (RF) transceiver and radio frequency amplifier;
Above-mentioned parts and similar of the prior art, be not elaborated at this, improvements of the present invention are, in each communication terminal, also comprise at least two receiving terminal filters that are connected between described duplexer and the described radio frequency receiver, the signal outside the working frequency range that receives from antenna that is used for decaying significantly; And being connected sending filter between described duplexer and the described radio frequency amplifier, the outer signal of its transmit frequency band is used for decaying significantly.Need to prove that described at least two receiving terminal filters can be the same or different.
When specific implementation, in first communication module, be connected at least two receiving terminal filters between first duplexer and first radio frequency receiver, it is a band pass filter, and the received signal that is used for decaying significantly is corresponding to the signal beyond the reception frequency range of first communication pattern.Because this first communication pattern is GSM850 in Fig. 2, its downstream frequency is 869～894MHZ, so the band pass filter that this receiving terminal filter is 869～894MHZ.One first sending filter is set between first duplexer and first radio frequency amplifier, and this first sending filter is used for decaying significantly and sends this first communication pattern of signal and send signal beyond frequency range.Because this first communication pattern is GSM850 in Fig. 2, its upstream frequency is 824～849MHZ, so first sending filter is the band pass filter of 824～849MHZ.
In like manner, in second communication module, the receiving terminal filter is corresponding to second communication pattern (DCS) band downlink (1805～1880MHZ) band pass filter; And second sending filter is corresponding to second communication pattern (DCS) uplink band (1710～1785MHZ) band pass filter.
Accordingly, in above-mentioned multi-mode mobile communication system, the concrete radiofrequency signal receiving course of its communication module is as described below:
Utilize the radiofrequency signal of antenna reception corresponding to a communication pattern (as GSM850);
(a plurality of band pass filters as 869～894MHZ) carry out filtration treatment to the radiofrequency signal of described reception, and it receives the outer signal of frequency range significantly to decay to adopt the band downlink of corresponding described communication pattern;
Radio frequency receiver is passed to baseband processing module with the radiofrequency signal after attenuation processing.
The concrete emission of radio frequency signals process of its communication module is as described below:
Radiofrequency launcher will be passed to radio frequency amplifier from the radiofrequency signal to be sent of correspondence one communication pattern (as GSM850) of baseband processing module;
Radio frequency amplifier amplifies described radiofrequency signal to be sent;
(824～849MHZ) band pass filter carries out filtration treatment to the radiofrequency signal to be sent after the described amplification, with the outer signal of its transmit frequency band of decaying to adopt the uplink band of corresponding described communication pattern;
Radiofrequency signal after attenuation processing is launched through antenna.
Embodiments of the invention, because receiving terminal and transmitting terminal at different mode are equipped with a band pass filter corresponding to this pattern frequency range, can carry out filtering (or significantly decaying) to the received signal of corresponding band and the outer clutter of band of transmission signal respectively, can significantly reduce to send of the interference of the out of band signal of signal, guarantee communication quality corresponding received signal.For example, in the embodiment of Fig. 2, when first communication module (GSM850) is launched, strictness is limited in the frequency range of 824～849MHZ because GSM850 transmits, even transmitting, this is coupled on the reception antenna of second communication module (DCS), claim the transmitting of first communication module on this reception antenna that is coupled to second communication module to be interference signal herein, owing to behind the duplexer of second communication module, be provided with the band pass filter of at least two 1805～1880MHZ, because interference signal is the signal in 824～849MHZ frequency range, so can be decayed significantly by the band pass filter of second communication module receiving terminal.So can overcome interference phenomenon of the prior art; In like manner, transmitting in the second communication module (1710～1785MHZ) reduce significantly that (824～849MHZ) produce to disturb to received signal system in the first communication module.
The above-mentioned pattern of only having enumerated first communication module is GSM850, and the pattern of second communication module is that DCS describes, and the invention is not restricted to this.In described GSM850, GSM900, PCS, DCS, PHS, CDMA2000, WCDMA, TD-SCDMA, these patterns of WiFi any two kinds.Just need to satisfy, the sending filter among Fig. 1 in each communication module, receiving terminal filter need corresponding with uplink band, the band downlink of its pattern that is adopted respectively.For example, suppose that first communication module adopts the communication pattern of GSM900, then the sending filter in first communication module should be corresponding to GSM900 uplink band (890～915MHZ) band pass filter; The receiving terminal filter should be corresponding to GSM900 band downlink (935～960MHZ) band pass filter.Other patterns similarly do not describe in detail at this.
In other embodiment, also can only improve one of them communication module (as first communication module or second communication module), other communication modules still adopt existing structure.Can reduce transmitting of one of them communication module so to a certain extent to the interference of the received signal of another communication module.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (12)
1, a kind of multimode mobile communication terminal comprises at least two communication modules, and wherein at least one communication module comprises:
Antenna;
The duplexer that is connected with described antenna;
Be used to receive radio frequency receiver from the radiofrequency signal of antenna;
Be used to send the radiofrequency launcher of radiofrequency signal;
Be used for the radio frequency amplifier that amplifies from the radiofrequency signal to be sent of radiofrequency launcher;
The baseband processing module that is connected respectively with described radio frequency receiver and radiofrequency launcher;
It is characterized in that, further comprise:
Be connected the receiving terminal filter between described duplexer and the described radio frequency receiver, the radiofrequency signal that is received that is used for decaying receives the outer signal of frequency range; And
Be connected the sending filter between described duplexer and the described radio frequency amplifier, the radiofrequency signal that is used for decaying to be sent sends the outer signal of frequency range.
2, multimode mobile communication terminal as claimed in claim 1 is characterized in that, described receiving terminal filter is in series at least two, and each receiving terminal filter is the band pass filter corresponding to the band downlink of respective communication pattern.
3, multimode mobile communication terminal as claimed in claim 1 or 2 is characterized in that, described transmitting terminal filter is the band pass filter corresponding to the uplink band of respective communication pattern.
4, multimode mobile communication terminal as claimed in claim 3 is characterized in that, described two communication patterns are any one or two kinds among GSM850, GSM900, PCS, DCS, PHS, CDMA2000, WCDMA, TD-SCDMA, the WiFi.
5, a kind of multimode mobile communication terminal radio-frequency (RF) receiving circuit comprises:
Antenna;
The duplexer that is connected with described antenna;
Be used to receive radio frequency receiver from the radiofrequency signal of antenna;
The baseband processing module that is connected with described radio frequency receiver;
It is characterized in that, further comprise:
Be connected the receiving terminal filter between described duplexer and the described radio frequency receiver, the radiofrequency signal that is received that is used for decaying receives the outer signal of frequency range.
6, multimode mobile communication terminal radio-frequency (RF) receiving circuit as claimed in claim 5 is characterized in that, described receiving terminal filter is in series at least two, and each receiving terminal filter is the band pass filter corresponding to the band downlink of respective communication pattern.
7, a kind of multimode mobile communication terminal radio-frequency transmissions circuit comprises:
Antenna;
The duplexer that is connected with described antenna;
Be used to send the radiofrequency launcher of radiofrequency signal;
Be used to amplify radio frequency amplifier from the radiofrequency signal to be sent of radiofrequency launcher;
The baseband processing module that is connected with described radiofrequency launcher;
It is characterized in that, further comprise:
Be connected the sending filter between described duplexer and the described radio frequency amplifier, the radiofrequency signal that is used for decaying to be sent sends the outer signal of frequency range.
8, multimode mobile communication terminal radio-frequency transmissions circuit as claimed in claim 7 is characterized in that, described transmitting terminal filter is the band pass filter corresponding to the uplink band of respective communication pattern.
9, a kind of multimode mobile communication terminal radio frequency receiving method is characterized in that, comprising:
Reception is from the radiofrequency signal corresponding to a communication pattern of antenna;
Radiofrequency signal to described reception is carried out attenuation processing, and decaying, it receives the outer signal of frequency range;
Radiofrequency signal after attenuation processing is passed to baseband processing module.
10, multimode mobile communication terminal radio frequency receiving method as claimed in claim 9 is characterized in that, the step that described radiofrequency signal to reception is carried out attenuation processing is specially:
Adopt the band pass filter of the band downlink of at least two described communication patterns of correspondence, the radiofrequency signal of described reception is carried out Filtering Processing.
11, a kind of multimode mobile communication terminal RF transmission method is characterized in that, comprising:
Radiofrequency signal to be sent from correspondence one communication pattern of baseband processing module is amplified;
Described radiofrequency signal to be sent is carried out attenuation processing, the outer signal of its transmit frequency band of decaying;
Radiofrequency signal after attenuation processing is launched through antenna.
12, multimode mobile communication terminal RF transmission method as claimed in claim 11 is characterized in that, described step of carrying out attenuation processing to sent radiofrequency signal is specially:
Adopt the band pass filter of the uplink band of corresponding described communication pattern, described radiofrequency signal to be sent is carried out Filtering Processing.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2007100959259A CN101043227A (en) | 2007-02-01 | 2007-03-29 | Multi-mode mobile communication terminal and its RF receiving and transmitting circuit, method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200720118509 | 2007-02-01 | ||
| CN200720118509.1 | 2007-02-01 | ||
| CNA2007100959259A CN101043227A (en) | 2007-02-01 | 2007-03-29 | Multi-mode mobile communication terminal and its RF receiving and transmitting circuit, method |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102457297A (en) * | 2010-10-19 | 2012-05-16 | 中国科学院微电子研究所 | Wireless transceiver |
| CN103199885A (en) * | 2013-04-10 | 2013-07-10 | 苏州智聚电子科技有限公司 | Large-power wireless communication device |
| CN105049078A (en) * | 2015-08-07 | 2015-11-11 | 惠州Tcl移动通信有限公司 | Radio frequency device based on Band28 frequency band and communication method thereof |
| CN105337038A (en) * | 2014-05-27 | 2016-02-17 | 展讯通信（上海）有限公司 | Antenna system |
| CN105680824A (en) * | 2016-01-08 | 2016-06-15 | 上海卫星工程研究所 | Remote double-control radio frequency link attenuation box |
| CN106685469A (en) * | 2017-01-24 | 2017-05-17 | 武汉市瑞达源科技有限公司 | Wireless communication device for synchronously receiving data |
| CN107196687A (en) * | 2011-02-10 | 2017-09-22 | 汤姆逊许可公司 | Launch and/or receive the wireless communication terminal of the signal in predetermined frequency band simultaneously |
| CN109981157A (en) * | 2019-03-01 | 2019-07-05 | 维沃移动通信有限公司 | A kind of radio frequency link control method and terminal |
| CN111163441A (en) * | 2020-04-03 | 2020-05-15 | 北京全路通信信号研究设计院集团有限公司 | Dual-mode vehicle-mounted radio station system |
-
2007
- 2007-03-29 CN CNA2007100959259A patent/CN101043227A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102457297A (en) * | 2010-10-19 | 2012-05-16 | 中国科学院微电子研究所 | Wireless transceiver |
| CN107196687A (en) * | 2011-02-10 | 2017-09-22 | 汤姆逊许可公司 | Launch and/or receive the wireless communication terminal of the signal in predetermined frequency band simultaneously |
| CN103199885A (en) * | 2013-04-10 | 2013-07-10 | 苏州智聚电子科技有限公司 | Large-power wireless communication device |
| CN105337038A (en) * | 2014-05-27 | 2016-02-17 | 展讯通信（上海）有限公司 | Antenna system |
| CN105337038B (en) * | 2014-05-27 | 2018-09-07 | 展讯通信（上海）有限公司 | A kind of antenna system |
| CN105049078A (en) * | 2015-08-07 | 2015-11-11 | 惠州Tcl移动通信有限公司 | Radio frequency device based on Band28 frequency band and communication method thereof |
| CN105680824A (en) * | 2016-01-08 | 2016-06-15 | 上海卫星工程研究所 | Remote double-control radio frequency link attenuation box |
| CN105680824B (en) * | 2016-01-08 | 2018-05-04 | 上海卫星工程研究所 | A kind of remote this dual control radio frequency link attenuation box |
| CN106685469A (en) * | 2017-01-24 | 2017-05-17 | 武汉市瑞达源科技有限公司 | Wireless communication device for synchronously receiving data |
| CN109981157A (en) * | 2019-03-01 | 2019-07-05 | 维沃移动通信有限公司 | A kind of radio frequency link control method and terminal |
| CN111163441A (en) * | 2020-04-03 | 2020-05-15 | 北京全路通信信号研究设计院集团有限公司 | Dual-mode vehicle-mounted radio station system |
| CN111163441B (en) * | 2020-04-03 | 2020-07-31 | 北京全路通信信号研究设计院集团有限公司 | Dual-mode vehicle-mounted radio station system |
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