CN103475384A - Multi-mode terminal capable of restraining mutual interference and variable filtering device - Google Patents
Multi-mode terminal capable of restraining mutual interference and variable filtering device Download PDFInfo
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Abstract
The invention discloses a multi-mode terminal capable of restraining mutual interference and a variable filtering device. Each radio frequency channel of the multi-mode terminal comprises a CPU, a signal transceiver, a radio frequency front end module and an antenna, wherein each CPU, one of the signal transceivers, one of the radio frequency front end modules and one of the antennas are connected in sequence, furthermore, the variable filtering devices are further distributed on the portion, between one of signal transceivers and one of the antennas, of each radio frequency channel, each CPU is used for sending frequency band information of waves to be filtered and related control information to the variable filtering devices, and the variable filtering devices are used for controlling the filtering frequency range to correspond to the frequency band information so that signals transmitted through each radio frequency channel can be filtered. According to the technical scheme, the interference of the emitted spurious signals in other communication systems can be effectively restrained, the multi-mode terminal is suitable for multi-mode multi-standby terminals, the communication quality is improved when multiple multi-mode multi-standby communication modules simultaneously work, and the product performance is enhanced.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of multimode terminal that suppresses to disturb mutually and variable filter.
Background technology
Along with communication 4G net, in global expansion commercialization, to intelligent terminal, network requirement improves constantly the user, and the multi-mode and multi-standby Mobile phone communication terminal becomes the main demand of Virtual network operator, more and more is subject to user's favor.
When bringing convenience to the user, also to technology, realizes multi-mode multi-standby terminal having increased difficulty, multi-mode multi-standby terminal has the problem of a plurality of communication transmitters and the mutual interference of receiver phase when the standby simultaneously of a plurality of patterns, the wherein outer interference of band, as: clutter interference, barrage jamming, be comparatively general interference, comparatively significantly interference can appear at GSM(DCS) in the mutual interference of mutual interference, WIFI and the LTE_B40 of frequency range and TDSCDMA_B34/39.Wherein, clutter interference is mainly communication module in the main wave energy process of emission, can produce the outer energy emission of band during the circuit such as the non-linear device of main ripple signal process, easy irradiation structure, the energy of these radiation can be fallen in the reception frequency range of other communication module, forms the interference to other receiver.
At present, prior art mainly contains the inhibition scheme of multifrequency mutual interference: scheme 1, employing filter filtering technology; Scheme 2, the isolation technology that increases.The concrete application schematic diagram of two kinds of inhibition schemes as shown in Figure 1.
Yet, the shortcoming that above-mentioned increase isolation between antennas reduces the scheme of disturbing mutually is that difficulty is large, antenna will be taken into account OTA(Over-The-Air, the aerial download) performance just is difficult to accomplish higher isolation, so can not eliminate interference fully, simultaneously the radiation resistance of antenna also affects poor radiation dispersion, and simultaneously spuious also have certain deterioration.And for disturbing source to increase the inhibition scheme of receiving filter, although can effectively suppress the transmitter band stray of interference source, but the device integrated level that present stage is used is more and more higher, height Integrated Solution schematic diagram as shown in Figure 2, same radio frequency path can use a plurality of frequency bands, PA(power amplifier) with situations such as duplexer can be integrated together, generally apply, now, the use of filter is extremely restricted.
Summary of the invention
The invention provides a kind of multimode terminal that suppresses to disturb mutually and variable filter, in order to solve in prior art, exist disturb mutually the problem that the inhibition scheme can not meet the current application demand.
According to one aspect of the present invention, a kind of multimode terminal that suppresses to disturb mutually is provided, each radio frequency path of described multimode terminal includes CPU, signal transceiver, radio-frequency front-end module and the antenna connected successively, further, also be laid with variable filter according to preset rules on described radio frequency path between signal transceiver and antenna, wherein:
Described CPU, be sent to described variable filter for the band information by be filtered;
Described variable filter, corresponding with described band information for controlling the frequency filtering scope, carry out the filtering processing with the signal to described radio frequency path transmission.
Alternatively, in multimode terminal of the present invention, the type of described variable filter comprises: in order to the variable band pass filter means of bandpass filtering, in order to the variable notch filter device of notch filter and in order to the bandwidth varying filter with logical or notch filter.
Alternatively, in multimode terminal of the present invention, describedly according to preset rules, be laid with variable filter, comprise: lay variable filter in order to carry out bandpass filtering and/or notch filter between described antenna and radio-frequency front-end module; And/or, lay variable filter in order to carry out bandpass filtering and/or notch filter between described radio-frequency front-end module and signal transceiver.
Alternatively, in multimode terminal of the present invention, the described laying between radio-frequency front-end module and signal transceiver in order to carry out the variable filter of bandpass filtering, further comprise: lay respectively described variable filter under all working frequency range of described radio frequency path support, perhaps, according to the disturbed test of carrying out in advance, lay respectively described variable filter under interference band.
Alternatively, in multimode terminal of the present invention, described CPU, be further used for obtaining the channel of described signal transceiver work at present, and corresponding band information is sent to the variable filter in order to bandpass filtering by described channel; And/or, obtain the pre-configured interference band that needs trap to process, and this interference band information is sent to the variable filter in order to notch filter.
Alternatively, in multimode terminal of the present invention, described variable filter specifically comprises: controller and changeable frequency filter;
Described controller, the band information for sending based on described CPU, issue the index signal of described frequency band being carried out to filtering control to described changeable frequency filter;
Described changeable frequency filter, for based on described index signal, select the frequency filtering scope corresponding with described frequency band, and the signal that described radio frequency path is transmitted carries out filtering.
Alternatively, in multimode terminal of the present invention, passband or the stopband range adjustable variable bandwidth filter of described changeable frequency filter for being prepared by variable dielectric constant or variable magnetic parameter material; Perhaps, described changeable frequency filter comprises: filter branch selector and a plurality of band filters corresponding from different frequency filtering scopes; Wherein, equal corresponding the different filter branch of each band filter; Described filter branch selector, for based on described index signal, select the filter branch corresponding with described frequency band, to utilize the band filter that this filter branch is corresponding, carries out the filtering processing.
Alternatively, in multimode terminal of the present invention, when described variable filter is the variable band pass filter means be applied on the emission path of described radio frequency path, described band filter is band pass filter, and described filter branch selector comprises: the first splitter and the second splitter;
Described the first splitter and the second splitter, be laid in the two ends of each filter branch, for according to described index signal, open the filter branch corresponding with described frequency band, so that band pass filter corresponding to this filter branch carries out bandpass filtering treatment according to the frequency filtering scope of self.
Alternatively, in multimode terminal of the present invention, when described variable filter is while being applied in the variable band pass filter means that receives path, described band filter is band pass filter, and described filter branch selector comprises: the mixer and the 3rd splitter that are laid in respectively each filter branch two ends;
Described the 3rd splitter, for according to default division rule, be the N section by the frequency band division that receives signal, and obtain corresponding band information according to described index signal, selects the filter branch corresponding with described band information to carry out signal transmission; Wherein, N is greater than 1 integer;
Described band pass filter, when selected for the filter branch corresponding, according to the frequency filtering scope of self, the signal that this filter branch is transmitted carries out bandpass filtering treatment;
Described mixer, closed road for the frequency band by after each segmentation and processed.
Alternatively, in multimode terminal of the present invention, when described variable filter is variable notch filter device, described band filter is notch filter, and described filter branch selector comprises: the 4th splitter;
Described the 4th splitter, be laid in an end of each filter branch, for according to described index signal, selects the filter branch corresponding with described band information, so that the notch filter of this filter branch carries out the notch filter processing according to the frequency filtering scope of self.
According to another aspect of the present invention, a kind of variable filter is provided, comprising: controller and changeable frequency filter;
Described controller, for issuing the index signal of assigned frequency band being carried out to filtering control to described changeable frequency filter;
Described changeable frequency filter, for based on described index signal, select the frequency filtering scope corresponding with described assigned frequency band, to treat filtering signal, carries out the filtering processing.
Alternatively, in variable filter of the present invention, passband or the stopband range adjustable variable bandwidth filter of described changeable frequency filter for being prepared by variable dielectric constant or variable magnetic parameter material;
Perhaps, described changeable frequency filter comprises: filter branch selector and a plurality of band filters corresponding from different frequency filtering scopes; Wherein, equal corresponding the different filter branch of each filter;
Described filter branch selector, for based on described index signal, select the filter branch corresponding with described assigned frequency band, to utilize the band filter that this filter branch is corresponding, carries out the filtering processing.
Alternatively, in variable filter of the present invention, when described variable filter is used for bandpass filtering and be applied in the emission path, described band filter is band pass filter, and described filter branch selector comprises: the first splitter and the second splitter;
Described the first splitter and the second splitter, be laid in the two ends of each filter branch, for according to described index signal, open the filter branch corresponding with described assigned frequency band, so that band pass filter corresponding to this filter branch carries out bandpass filtering treatment according to the frequency filtering scope of self.
Alternatively, in variable filter of the present invention, when described variable filter is used for bandpass filtering and be applied in the reception path, described band filter is band pass filter, and described filter branch selector comprises: the mixer and the 3rd splitter that are laid in respectively each filter branch two ends;
Described the 3rd splitter, for according to default division rule, be the N section by the frequency band division that receives path and receive signal, and according to described index signal corresponding assigned frequency band information, select the filter branch corresponding with described assigned frequency band to carry out signal transmission; Wherein, N is greater than 1 integer;
Described band pass filter, when selected for the filter branch corresponding, according to the frequency filtering scope of self, the signal that this filter branch is transmitted carries out bandpass filtering treatment;
Described mixer, closed road for the frequency band by after each segmentation and processed.
Alternatively, in variable filter of the present invention, when described variable filter is used for notch filter, described band filter is notch filter, and described filter branch selector comprises: the 4th splitter;
Described the 4th splitter, be laid in an end of each filter branch, for according to described index signal, selects the filter branch corresponding with described assigned frequency band, so that the notch filter of this filter branch carries out the notch filter processing according to the frequency filtering scope of self.
Beneficial effect of the present invention is as follows:
Technical scheme of the present invention can effectively suppress the interference of the spurious signal of emission to other communication system, is applicable to multi-mode multi-standby terminal, has improved communication quality when the many communication modules of multi-mode and multi-standby machine are worked simultaneously, has strengthened properties of product.
Above-mentioned explanation is only the general introduction of technical solution of the present invention, in order to better understand technological means of the present invention, and can be implemented according to the content of specification, and for above and other objects of the present invention, feature and advantage can be become apparent, below especially exemplified by the specific embodiment of the present invention.
The accompanying drawing explanation
By reading hereinafter detailed description of the preferred embodiment, various other advantage and benefits will become cheer and bright for those of ordinary skills.Accompanying drawing is only for the purpose of preferred implementation is shown, and do not think limitation of the present invention.And, in whole accompanying drawing, by identical reference symbol, mean identical parts.In the accompanying drawings:
Fig. 1 disturbs the schematic diagram of inhibition scheme in prior art;
The schematic diagram that Fig. 2 is radio frequency path height Integrated Solution in prior art;
The structural representation of a kind of multimode terminal that suppresses to disturb mutually that Fig. 3 provides for the embodiment of the present invention;
Fig. 4 is that in the embodiment of the present invention, variable filter carries out passband, schematic diagram is selected in stopband filtering;
The structural representation that Fig. 5 is variable filter in the embodiment of the present invention;
The structural representation that Fig. 6 is the variable filter that is comprised of packaging changeable frequency filter in the embodiment of the present invention;
The another structural representation that Fig. 7 is variable filter in the embodiment of the present invention;
The structural representation again that Fig. 8 is variable filter in the embodiment of the present invention;
A kind of application example figure that Fig. 9 is variable filter structure shown in Fig. 8;
The structural representation again that Figure 10 is variable filter in the embodiment of the present invention.
Embodiment
Exemplary embodiment of the present disclosure is described below with reference to accompanying drawings in more detail.Although shown exemplary embodiment of the present disclosure in accompanying drawing, yet should be appreciated that and can realize the disclosure and the embodiment that should do not set forth limits here with various forms.On the contrary, it is in order more thoroughly to understand the disclosure that these embodiment are provided, and can be by the scope of the present disclosure complete conveys to those skilled in the art.
For eliminating in same communication terminal when a plurality of communication modules are concurrent the band interference outward produced and being with interior the interference, the invention provides a kind of multimode terminal that suppresses to disturb mutually, and be applied in the variable filter that in multimode terminal, the realization inhibition is disturbed mutually.Utilize scheme of the present invention can improve the communication module performance, improve communication quality.Below just by several specific embodiments, scheme of the present invention is described in detail.
Embodiment mono-
The embodiment of the present invention provides a kind of multimode terminal that suppresses to disturb mutually, as shown in Figure 3, each radio frequency path of described multimode terminal includes CPU, signal transceiver, radio-frequency front-end module and the antenna connected successively, wherein, also be laid with variable filter according to preset rules on described radio frequency path between signal transceiver and antenna, wherein:
CPU, be sent to variable filter for the band information by be filtered; Preferably, described CPU is sent to described variable filter by described band information with the pattern of control information;
Variable filter, corresponding with described band information for controlling the frequency filtering scope, carry out the filtering processing with the signal to described radio frequency path transmission.
Wherein, variable filter application principle is mainly that operating frequency range by changing filter and performance reach and suppress the purpose of disturbing.Variable filter comprises two kinds of application situations, is respectively and is applied in the possible interference to disturbed source of disturbing source to suppress that interference source sends; And be applied in disturbed source and suppress the interference signal from interference source.
Wherein, when being applied in the interference source, variable filter carries out bandpass filtering, and when being applied in disturbed source, variable filter carries out notch filter.So, in the present embodiment, the type of variable filter comprises: in order to the variable band pass filter means of bandpass filtering, in order to the variable notch filter device of notch filter and both can also can be in order to the bandwidth varying filter of notch filter (in order to bandpass filtering, by the regulating frequency scope, both can carry out bandpass filtering and also can carry out the filter of notch filter).Concrete, in the situation that different communication frequencys and communication bandwidth, as shown in Figure 4, in figure, f1, f2, f3, f4 are bandpass filtering to the bandwidth selection schematic diagram that variable filter carries out passband or stopband according to adjustable extent, and f5, f6 are notch filter.
Further, in the embodiment of the present invention, lay variable filter in radio frequency path, comprising:, according to business demand, lay in order to carry out the variable filter of bandpass filtering and/or notch filter between antenna and radio-frequency front-end module (1); (2), according to business demand, between radio-frequency front-end module and signal transceiver, lay in order to carry out the variable filter of bandpass filtering and/or notch filter; (3) according to business demand, both between antenna and radio-frequency front-end module, laid in order to carry out the variable filter of bandpass filtering and/or notch filter, laid in order to carry out the variable filter of bandpass filtering and/or notch filter between radio-frequency front-end module and signal transceiver again; As shown in Figure 3, both show between antenna and radio-frequency front-end module, lay again the schematic diagram of variable filter between radio-frequency front-end module and signal transceiver.
Further, in the embodiment of the present invention, between radio-frequency front-end module and signal transceiver, lay when carrying out the variable filter of bandpass filtering, can under all working frequency range of radio frequency path support, lay respectively described variable filter, as shown in Figure 3, be the schematic diagram of laying variable filter under all working frequency range.But more preferably, can design in advance at which working frequency range and increase variable filter according to the disturbed test situation of system, thereby effectively control system realizes cost.
Application principle based on above-mentioned variable filter and the deployment way of variable filter, below in conjunction with the concrete structure composition of variable filter, it is realized to the specific implementation process that suppresses to disturb is set forth:
In the embodiment of the present invention, variable filter as shown in Figure 5, specifically comprises: controller and changeable frequency filter;
Described controller, the band information for sending based on CPU, issue the index signal of described frequency band being carried out to filtering control to the changeable frequency filter;
Described changeable frequency filter, for based on described index signal, select the frequency filtering scope corresponding with described frequency band, and the signal that described radio frequency path is transmitted carries out filtering.
Wherein, the composition form of changeable frequency filter comprises two kinds, is respectively:
(1) intelligent changeable frequency filter, that is: the changeable frequency filter is the passband that prepared by variable dielectric constant or variable magnetic parameter material or the adjustable variable bandwidth filter of stopband range (that is: both can also can be in order to the filter of notch filter in order to bandpass filtering), and it can realize disturbing and disturbed inhibition;
(2) packaging changeable frequency filter, that is: the changeable frequency filter is comprised of filter branch selector and a plurality of band filters corresponding from different frequency filtering scopes (each band filter all corresponding different filter branch); Wherein, the filter branch selector, for the index signal issued based on controller, select the filter branch corresponding with the band information of index signal indication, to utilize the band filter that this filter branch is corresponding, carries out the filtering processing.The structure chart of the variable filter be comprised of described packaging changeable frequency filter as shown in Figure 6.
Further, in the embodiment of the present invention, when the changeable frequency filter is packaging changeable frequency filter, the different application scene based on variable filter, the version of changeable frequency filter is also different, and main manifestations is:
(1) when described variable filter is the variable band pass filter means be applied on the emission path of radio frequency path, in the changeable frequency filter, (a plurality of band filters are band pass filter, meeting is path to useful signal, for interference signal, inhibitory action is arranged, realizes the logical function of band), the filter branch selector comprises the first splitter and the second splitter, wherein, the first splitter and the second splitter are laid in the two ends of each filter branch.As shown in Figure 7, now, variable filter realizes that the mode of disturbing mutually inhibition is to the structure chart of concrete variable filter:
(1) CPU obtains the channel of signal transceiver work at present, and corresponding band information is sent to the controller of variable band pass filter means by described channel;
(2) band information that controller sends based on CPU, issue the index signal of described frequency band being carried out to filtering control to the changeable frequency filter;
(3) the changeable frequency filter, according to index signal, is controlled filter branch corresponding to frequency band that the first splitter and the second splitter are opened the index signal indication;
(4), when certain filter branch is unlocked, the band pass filter that this filter branch is corresponding carries out bandpass filtering treatment.
That is to say, in the present embodiment, variable strip zone pass filter application of installation is in the emission path, be mainly used in the interference source, suppress the interference signal that interference source may be launched, if the channel of radio frequency operation in Band A, that just starts filter branch and the device of Band A, the operation principle of Band B too, thereby suppress to disturb.
(2) when variable filter is the variable band pass filter means be applied on the reception path of radio frequency path, in the changeable frequency filter, (a plurality of band filters are band pass filter, meeting is path to useful signal, for interference signal, inhibitory action is arranged, realize the logical function of band), the filter branch selector comprises mixer and the 3rd splitter that is laid in respectively each filter branch two ends.As shown in Figure 8, now, variable filter realizes that the mode of disturbing mutually inhibition is to the structure chart of concrete variable filter:
(1) CPU obtains the channel of signal transceiver work at present, and corresponding band information is sent to the controller of variable band pass filter means by described channel;
(2) band information that controller sends based on CPU, issue the index signal of described frequency band being carried out to filtering control to the changeable frequency filter;
(3) the changeable frequency filter utilizes the 3rd splitter according to default division rule, is the N section by the frequency band division that receives signal, and obtains corresponding band information according to described index signal, selects the filter branch corresponding with described band information to carry out signal transmission; Wherein, N is greater than 1 integer;
(4) band pass filter is when corresponding filter branch is selected, and according to the frequency filtering scope of self, the signal that this filter branch is transmitted carries out bandpass filtering treatment;
(5) mixer is closed the road processing by the frequency band after each segmentation.
For the above-mentioned processing procedure of clearer explanation, below provide a concrete example, be suppressed in order to illustrate to disturb mutually the application that receives passage portion.
The frequency range of example: LTE_B41 is (2496-2690) MHz, bandwidth approaches 200MHz, product from the product man of current filter, can cover wider scope and realize that less restriction technically is larger with internal loss, the cost of product also can be too high simultaneously, use variable filter to be easy to solve, the block diagram of scheme as shown in Figure 9.The B41 signal is separated into Band_A(2496-2600MHz) with two sections of Band_B (2600-2690MHz), the channel information that CPU judgement transceiver is being worked, can judge that by channel information Band41 is work Band_A part or Band_B part, if the channel of work is in A frequency band scope, optional filter is selected to carry out signal transmission from Band A path, the operation principle of Band B is identical, certainly, also the frequency range of B41 is divided and is not limited only to be divided into two sections, or is divided into multistage.
(3) when described variable filter is variable notch filter device, in the changeable frequency filter, a plurality of band filters are notch filter, and the filter branch selector comprises: the 4th splitter, wherein, the 4th splitter is laid in an end of each filter branch.As shown in figure 10, now, variable filter realizes that the mode of disturbing mutually inhibition is to the structure chart of concrete variable filter:
(1) CPU obtains the pre-configured interference band that needs trap to process, and this interference band information is sent to the controller of variable notch filter device;
(2) band information that controller sends based on CPU, issue the index signal of described frequency band being carried out to filtering control to the changeable frequency filter;
(3) the changeable frequency filter, according to described index signal, is controlled the 4th splitter and is selected filter branch corresponding to band information indicated with index signal;
(4) when certain filter branch is selected, the notch filter of this filter branch carries out the notch filter processing.
That is to say, in the present embodiment, variable notch filter application of installation is in disturbed end, inhibition is from the interference signal of interference source, if be subject to the interference of Band A, the 4th splitter is chosen in Band A trap state so, thereby curb the interference of Band A, thereby suppress to disturb; In like manner, Band B too.
In sum, the described technical scheme of the embodiment of the present invention can effectively suppress the interference of the spurious signal of emission to other communication system, be applicable to multi-mode multi-standby terminal, improved communication quality when the many communication modules of multi-mode and multi-standby machine are worked simultaneously, strengthened properties of product.
Embodiment bis-
The embodiment of the present invention provides a kind of variable filter, continues as shown in Figure 5, and described variable filter comprises: controller and changeable frequency filter, wherein:
Controller, for issuing the index signal of assigned frequency band being carried out to filtering control to the changeable frequency filter;
The changeable frequency filter, for based on index signal, select the frequency filtering scope corresponding with described assigned frequency band, to treat filtering signal, carries out the filtering processing.
Identical with embodiment mono-, described changeable frequency filter composition form comprise two kinds, be respectively:
(1) intelligent changeable frequency filter, that is: the changeable frequency filter is the passband that prepared by variable dielectric constant or variable magnetic parameter material or the adjustable variable bandwidth filter of stopband range (that is: both can also can be in order to the filter of notch filter in order to bandpass filtering), and it can realize disturbing and disturbed inhibition;
(2) packaging changeable frequency filter, that is: the changeable frequency filter is comprised of filter branch selector and a plurality of band filters corresponding from different frequency filtering scopes (each band filter all corresponding different filter branch); Wherein, the filter branch selector, for the index signal issued based on controller, select the filter branch corresponding with the assigned frequency band of index signal indication, to utilize the band filter that this filter branch is corresponding, carries out the filtering processing.The structure chart of the variable filter be comprised of described packaging changeable frequency filter continues as shown in Figure 6.
Further, in the embodiment of the present invention, when the changeable frequency filter is packaging changeable frequency filter, the version of changeable frequency filter is also different, and main manifestations is:
(1) continue as shown in Figure 7, in the changeable frequency filter, a plurality of band filters are band pass filter (that is, meeting are path to useful signal, for interference signal, inhibitory action is arranged, realize the logical function of band), the filter branch selector comprises: the first splitter and the second splitter;
Wherein, the first splitter and the second splitter, be laid in the two ends of each filter branch, for according to described index signal, open the filter branch corresponding with described assigned frequency band, so that band pass filter corresponding to this filter branch carries out bandpass filtering treatment according to the frequency filtering scope of self.
The variable filter of said structure form is generally used for bandpass filtering and is applied in the emission path.
(2) continue as shown in Figure 8, in the changeable frequency filter, (a plurality of band filters are band pass filter, meeting is path to useful signal, for interference signal, inhibitory action is arranged, realize the logical function of band), the filter branch selector comprises: the mixer and the 3rd splitter that are laid in respectively each filter branch two ends;
Wherein, the 3rd splitter, for according to default division rule, be the N section by the frequency band division that receives signal, and according to described index signal corresponding assigned frequency band information, select the filter branch corresponding with described assigned frequency band to carry out signal transmission; Wherein, N is greater than 1 integer;
Band pass filter, when selected for the filter branch corresponding, according to the frequency filtering scope of self, the signal that this filter branch is transmitted carries out bandpass filtering treatment;
Mixer, closed road for the frequency band by after each segmentation and processed.
The variable filter of said structure form is generally used for bandpass filtering and is applied in receiving in path.
(3) continue as shown in figure 10, in the changeable frequency filter, a plurality of band filters are notch filter, and the filter branch selector comprises: the 4th splitter;
The 4th splitter, be laid in an end of each filter branch, for according to described index signal, selects the filter branch corresponding with described assigned frequency band, so that the notch filter of this filter branch carries out the notch filter processing according to the frequency filtering scope of self.
The variable filter of said structure form is generally used for notch filter, both can be applicable in the emission path, also can be applicable to and receives in path.
In sum, the embodiment of the present invention provides a kind of variable filter, this variable filter both can carry out the adjustable bandpass filtering of frequency band range, also can carry out the adjustable notch filter of frequency band range, while making this variable filter be applied in the radio frequency path of terminal, for disturbing mutually, suppress to provide technical support.
Obviously, those skilled in the art can carry out various changes and modification and not break away from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention also is intended to comprise these changes and modification interior.
Claims (17)
1. the multimode terminal that inhibition is disturbed mutually, each radio frequency path of described multimode terminal includes CPU, signal transceiver, radio-frequency front-end module and the antenna connected successively, it is characterized in that, also be laid with variable filter according to preset rules on described radio frequency path between signal transceiver and antenna, wherein:
Described CPU, be sent to described variable filter for the band information by be filtered;
Described variable filter, corresponding with described band information for controlling the frequency filtering scope, carry out the filtering processing with the signal to described radio frequency path transmission.
2. multimode terminal as claimed in claim 1, it is characterized in that, the type of described variable filter comprises: in order to the variable band pass filter means of bandpass filtering, in order to the variable notch filter device of notch filter and in order to the bandwidth varying filter with logical or notch filter.
3. multimode terminal as claimed in claim 2, is characterized in that, describedly according to preset rules, is laid with variable filter, comprising: lay variable filter in order to carry out bandpass filtering and/or notch filter between described antenna and radio-frequency front-end module; And/or, lay variable filter in order to carry out bandpass filtering and/or notch filter between described radio-frequency front-end module and signal transceiver.
4. multimode terminal as claimed in claim 3, it is characterized in that, the described laying between radio-frequency front-end module and signal transceiver in order to carry out the variable filter of bandpass filtering, further comprise: lay respectively described variable filter under all working frequency range of described radio frequency path support, perhaps, according to the disturbed test of carrying out in advance, lay respectively described variable filter under interference band.
5. multimode terminal as claimed in claim 3, is characterized in that, described CPU is further used for obtaining the channel of described signal transceiver work at present, and corresponding band information is sent to the variable filter in order to bandpass filtering by described channel; And/or, obtain the pre-configured interference band that needs trap to process, and this interference band information is sent to the variable filter in order to notch filter.
6. multimode terminal as described as claim 2 to 5 any one, is characterized in that, described variable filter specifically comprises: controller and changeable frequency filter;
Described controller, the band information for sending based on described CPU, issue the index signal of described frequency band being carried out to filtering control to described changeable frequency filter;
Described changeable frequency filter, for based on described index signal, select the frequency filtering scope corresponding with described frequency band, and the signal that described radio frequency path is transmitted carries out filtering.
7. multimode terminal as claimed in claim 6, is characterized in that, passband or the stopband range adjustable variable bandwidth filter of described changeable frequency filter for being prepared by variable dielectric constant or variable magnetic parameter material.
8. multimode terminal as claimed in claim 6, is characterized in that, described changeable frequency filter comprises: filter branch selector and a plurality of band filters corresponding from different frequency filtering scopes; Wherein, equal corresponding the different filter branch of each band filter;
Described filter branch selector, for based on described index signal, select the filter branch corresponding with described frequency band, to utilize the band filter that this filter branch is corresponding, carries out the filtering processing.
9. multimode terminal as claimed in claim 8, it is characterized in that, when described variable filter is the variable band pass filter means be applied on the emission path of described radio frequency path, described band filter is band pass filter, and described filter branch selector comprises: the first splitter and the second splitter;
Described the first splitter and the second splitter, be laid in the two ends of each filter branch, for according to described index signal, open the filter branch corresponding with described frequency band, so that band pass filter corresponding to this filter branch carries out bandpass filtering treatment according to the frequency filtering scope of self.
10. multimode terminal as claimed in claim 8, it is characterized in that, when described variable filter is while being applied in the variable band pass filter means that receives path, described band filter is band pass filter, and described filter branch selector comprises: the mixer and the 3rd splitter that are laid in respectively each filter branch two ends;
Described the 3rd splitter, for according to default division rule, be the N section by the frequency band division that receives signal, and obtain corresponding band information according to described index signal, selects the filter branch corresponding with described band information to carry out signal transmission; Wherein, N is greater than 1 integer;
Described band pass filter, when selected for the filter branch corresponding, according to the frequency filtering scope of self, the signal that this filter branch is transmitted carries out bandpass filtering treatment;
Described mixer, closed road for the frequency band by after each segmentation and processed.
11. multimode terminal as described as claim 8 to 10 any one, is characterized in that, when described variable filter is variable notch filter device, described band filter is notch filter, and described filter branch selector comprises: the 4th splitter;
Described the 4th splitter, be laid in an end of each filter branch, for according to described index signal, selects the filter branch corresponding with described band information, so that the notch filter of this filter branch carries out the notch filter processing according to the frequency filtering scope of self.
12. a variable filter, is characterized in that, comprising: controller and changeable frequency filter;
Described controller, for issuing the index signal of assigned frequency band being carried out to filtering control to described changeable frequency filter;
Described changeable frequency filter, for based on described index signal, select the frequency filtering scope corresponding with described assigned frequency band, to treat filtering signal, carries out the filtering processing.
13. variable filter as claimed in claim 12, is characterized in that, passband or the stopband range adjustable variable bandwidth filter of described changeable frequency filter for being prepared by variable dielectric constant or variable magnetic parameter material.
14. variable filter as claimed in claim 12, is characterized in that, described changeable frequency filter comprises: filter branch selector and a plurality of band filters corresponding from different frequency filtering scopes; Wherein, equal corresponding the different filter branch of each filter;
Described filter branch selector, for based on described index signal, select the filter branch corresponding with described assigned frequency band, to utilize the band filter that this filter branch is corresponding, carries out the filtering processing.
15. variable filter as claimed in claim 14, it is characterized in that, when described variable filter is used for bandpass filtering and be applied in the emission path, described band filter is band pass filter, and described filter branch selector comprises: the first splitter and the second splitter;
Described the first splitter and the second splitter, be laid in the two ends of each filter branch, for according to described index signal, open the filter branch corresponding with described assigned frequency band, so that band pass filter corresponding to this filter branch carries out bandpass filtering treatment according to the frequency filtering scope of self.
16. variable filter as claimed in claim 14, it is characterized in that, when described variable filter is used for bandpass filtering and be applied in the reception path, described band filter is band pass filter, and described filter branch selector comprises: the mixer and the 3rd splitter that are laid in respectively each filter branch two ends;
Described the 3rd splitter, for according to default division rule, be the N section by the frequency band division that receives path and receive signal, and according to described index signal corresponding assigned frequency band information, select the filter branch corresponding with described assigned frequency band to carry out signal transmission; Wherein, N is greater than 1 integer;
Described band pass filter, when selected for the filter branch corresponding, according to the frequency filtering scope of self, the signal that this filter branch is transmitted carries out bandpass filtering treatment;
Described mixer, closed road for the frequency band by after each segmentation and processed.
17. variable filter as described as claim 14 to 16 any one, is characterized in that, when described variable filter is used for notch filter, described band filter is notch filter, and described filter branch selector comprises: the 4th splitter;
Described the 4th splitter, be laid in an end of each filter branch, for according to described index signal, selects the filter branch corresponding with described assigned frequency band, so that the notch filter of this filter branch carries out the notch filter processing according to the frequency filtering scope of self.
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