CN104902054A - Method and device for filtering out interference frequency points of mobile terminal - Google Patents
Method and device for filtering out interference frequency points of mobile terminal Download PDFInfo
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Abstract
The invention relates to a method and a device for filtering out interface frequency points of a mobile terminal which are used for filtering out interference signals of a USB wire to a mobile device. The method comprises the steps of: determining the intensity of the interference signals from the USB data wire and a first central frequency point of the interference signals; according to the signal intensity and the first central frequency point, adjusting the capacitance of a variable capacitor of a trap wave network in the USB data wire; according to the adjusted capacitor, adjusting a second central frequency point of the trap wave network to enable the first central frequency point and the second central frequency point to be the same. According to the technical scheme of the invention, the layout space of a PCB board on the mobile terminal is saved, and the interference signals generated by a USB charger or a laptop to the mobile terminal are effectively filtered out.
Description
Technical field
The disclosure relates to electronic technology field, particularly relates to a kind of method and device of interference frequency of filtering mobile terminal.
Background technology
Along with the frequency range of mobile phone is done more and more, and the antenna needed also gets more and more, antenna such as has 2G/3G/4G and wifi, and the becoming increasingly complex of mobile phone institute's environment for use, the interference that mobile phone is subject to also gets more and more, such as, mobile phone is charged by USB data line, or by USB line at the enterprising edlin of notebook, because the interference inherently of USB charger or notebook can form interference to mobile phone, and then affect the wireless performance of mobile phone.
Summary of the invention
For overcoming Problems existing in correlation technique, disclosure embodiment provides a kind of method and device of interference frequency of filtering mobile terminal, in order to filtering USB line to the interference signal of mobile device.
According to the first aspect of disclosure embodiment, a kind of method of interference frequency of filtering mobile terminal is provided, comprises:
Determine the first center frequency point of signal strength signal intensity from the interference signal of USB data line and described interference signal;
The capacitance of the variable capacitance of the wave invigorating network of described USB data line is arranged according to described signal strength signal intensity and described first center frequency point adjustment;
Adjust the second center frequency point of described wave invigorating network according to the described capacitance after adjustment, make described first center frequency point identical with described second center frequency point.
In one embodiment, described the first center frequency point determining the signal strength signal intensity from the interference signal of USB data line and described interference signal, can comprise:
Receive the interference signal from the FPDP of USB data line;
By the first center frequency point of the signal strength signal intensity in interference signal described in frequency spectrum detection electric circuit inspection and described interference signal.
In one embodiment, the described capacitance being arranged in the variable capacitance of the wave invigorating network of described USB data line according to described signal strength signal intensity and described first center frequency point adjustment, can comprise:
The capacitance of the needs of the variable capacitance of the wave invigorating network being arranged in described USB data line is determined according to described signal strength signal intensity and described first center frequency point;
The capacitance of the variable capacitance in described wave invigorating network is adjusted to the capacitance of described needs.
In one embodiment, described wave invigorating network can be passive twin-T network, and described second center frequency point is F=1/2 π (R*C), wherein, R is the resistance of the resistance in described wave invigorating network, and C is the capacitance of the variable capacitance in described wave invigorating network, and π is constant.
According to the second aspect of disclosure embodiment, a kind of device of interference frequency of filtering mobile terminal is provided, comprises:
First determination module, is configured to determine the first center frequency point of signal strength signal intensity from the interference signal of USB data line and described interference signal;
First adjusting module, is configured to the capacitance that the described signal strength signal intensity determined according to described first determination module and described first center frequency point adjustment are arranged in the variable capacitance of the wave invigorating network of described USB data line;
Second adjusting module, is configured to the second center frequency point that the described capacitance after according to described first adjusting module adjustment adjusts described wave invigorating network, makes described first center frequency point identical with described second center frequency point.
In one embodiment, described first determination module can comprise:
Receive submodule, be configured to receive the interference signal from the FPDP of USB data line;
Detection sub-module, is configured to the first center frequency point by receiving signal strength signal intensity in described interference signal that submodule receives and described interference signal described in frequency spectrum detection electric circuit inspection.
In one embodiment, described first adjusting module can comprise:
Determine submodule, be configured to the capacitance determining the needs of the variable capacitance of described wave invigorating network according to described signal strength signal intensity and described first center frequency point;
Adjustment submodule, is configured to the capacitance of the variable capacitance in described wave invigorating network is adjusted to the described capacitance determining the described needs that submodule is determined.
In one embodiment, described wave invigorating network can be passive twin-T network, and described second center frequency point is F=1/2 π (R*C), wherein, R is the resistance of the resistance in described wave invigorating network, and C is the capacitance of the variable capacitance in described wave invigorating network, and π is constant.
According to the third aspect of disclosure embodiment, a kind of device of interference frequency of filtering mobile terminal is provided, comprises:
Processor;
For the memory of storage of processor executable instruction;
Wherein, described processor is configured to:
Determine the first center frequency point of signal strength signal intensity from the interference signal of USB data line and described interference signal;
The capacitance of the variable capacitance of the wave invigorating network of described USB data line is arranged according to described signal strength signal intensity and described first center frequency point adjustment;
Adjust the second center frequency point of described wave invigorating network according to the described capacitance after adjustment, make described first center frequency point identical with described second center frequency point.
The technical scheme that embodiment of the present disclosure provides can comprise following beneficial effect: because wave invigorating network is arranged in USB data line, thus saves the pcb board arrangement space on mobile terminal; Realize regulating the second center frequency point of wave invigorating network by the variable capacitance in adjustment wave invigorating network, effectively the interference signal that produces mobile terminal of filtering USB charger or notebook.
Should be understood that, it is only exemplary and explanatory that above general description and details hereinafter describe, and can not limit the disclosure.
Accompanying drawing explanation
Accompanying drawing to be herein merged in specification and to form the part of this specification, shows embodiment according to the invention, and is used from specification one and explains principle of the present invention.
Figure 1A is the flow chart of the method for the interference frequency of filtering mobile terminal according to an exemplary embodiment.
Figure 1B is the circuit diagram of USB data line according to an exemplary embodiment and wave invigorating network.
Fig. 1 C is the circuit diagram of USB data line according to an exemplary embodiment one and wave invigorating network.
Fig. 2 is the flow chart of the method for the interference frequency of filtering mobile terminal according to an exemplary embodiment one.
Fig. 3 is the block diagram of the device of the interference frequency of a kind of filtering mobile terminal according to an exemplary embodiment.
Fig. 4 is the block diagram of the device of the interference frequency of another kind of filtering mobile terminal according to an exemplary embodiment.
Fig. 5 is a kind of block diagram being applicable to the device of the interference frequency of filtering mobile terminal according to an exemplary embodiment.
Embodiment
Here will be described exemplary embodiment in detail, its sample table shows in the accompanying drawings.When description below relates to accompanying drawing, unless otherwise indicated, the same numbers in different accompanying drawing represents same or analogous key element.Execution mode described in following exemplary embodiment does not represent all execution modes consistent with the present invention.On the contrary, they only with as in appended claims describe in detail, the example of apparatus and method that aspects more of the present invention are consistent.
Figure 1A is the flow chart of the method for the interference frequency of filtering mobile terminal according to an exemplary embodiment, and Figure 1B is the circuit diagram of USB data line according to an exemplary embodiment and wave invigorating network; Can applying on mobile terminals of the interference frequency of this filtering mobile terminal, as shown in Figure 1A, the method for the interference frequency of this filtering mobile terminal comprises the following steps S101-S 103:
In step S101, determine the first center frequency point of signal strength signal intensity from the interference signal of USB data line and interference signal.
In one embodiment, the signal strength signal intensity of the interference signal of USB data line and the first center frequency point F1 of interference signal can be detected by frequency spectrum detection circuit.
In step s 102, the capacitance of the variable capacitance of the wave invigorating network of USB data line is arranged according to signal strength signal intensity and the adjustment of the first center frequency point.
In one embodiment, can according to the anti-capacitance pushed away required for wave invigorating network of F1=1/2 π (R*C), such as, when resistance value R is certain, first center frequency point F1 is determined by above-mentioned steps S101, therefore can be determined the electric capacity in wave invigorating network by F1=1/2 π (R*C).
In step s 103, according to the second center frequency point of the capacitance adjustment wave invigorating network after adjustment, make the first center frequency point identical with the second center frequency point.
As shown in Figure 1B, after mobile terminal 10 is connected with notebook or USB connector 12 by USB data line 11, frequency spectrum detection circuit 13 identifies signal strength signal intensity from the interference signal of USB data line 11 and the first center frequency point; Signal strength signal intensity and the first center frequency point are fed back to the control module 14 of variable capacitance by frequency spectrum detection circuit 13, the control module 14 of variable capacitance controls the capacitance of the variable capacitance in the wave invigorating network 15 in USB data line 11 again according to signal strength signal intensity and the first center frequency point, thus play the function of the second center frequency point of adjustment wave invigorating network, the clutter of many groups that real-time filtering USB data line produces interference.
As shown in Figure 1 C, the series signals of wave invigorating network 15 is connected into the D+/D-port of USB data line, USB data line can the interference frequency of filtering be the second center frequency point of wave invigorating network 15, and the resistance value in the second center frequency point and wave invigorating network and the computing formula of capacitance are: F2=1/2 π (R*C); In one embodiment, wave invigorating network 15 is R/C wave invigorating network, by changing the value of series and parallel resistance capacitance, thus reaches the effect of the second center frequency point of adjustment wave invigorating network 15, and then the interference signal in the spectral range at filtering second center frequency point place.
In the present embodiment, because wave invigorating network is arranged in USB data line, thus save the pcb board arrangement space on mobile terminal; Realize regulating the second center frequency point of wave invigorating network by the variable capacitance in adjustment wave invigorating network, effectively the interference signal that produces mobile terminal of filtering USB charger or notebook.
In one embodiment, determine the first center frequency point of signal strength signal intensity from the interference signal of USB data line and interference signal, can comprise:
Receive the interference signal from the FPDP of USB data line;
By the first center frequency point of the signal strength signal intensity in frequency spectrum detection electric circuit inspection interference signal and interference signal.
In one embodiment, be arranged in the capacitance of the variable capacitance of the wave invigorating network of USB data line according to signal strength signal intensity and the adjustment of the first center frequency point, can comprise:
The capacitance of the needs of the variable capacitance of the wave invigorating network being arranged in USB data line is determined according to signal strength signal intensity and the first center frequency point;
The capacitance of the variable capacitance in wave invigorating network is adjusted to the capacitance of needs.
In one embodiment, wave invigorating network can be passive twin-T network, and the second center frequency point is F=1/2 π (R*C), and wherein, R is the resistance of the resistance in wave invigorating network, and C is the capacitance of the variable capacitance in wave invigorating network, and π is constant.
The interference frequency of concrete how filtering mobile terminal, please refer to subsequent embodiment.
So far, the said method that disclosure embodiment provides, can save the pcb board arrangement space on mobile terminal, the interference signal that effective filtering USB charger or notebook produce mobile terminal.
With specific embodiment, the technical scheme that disclosure embodiment provides is described below.
Fig. 2 is the flow chart of the method for the interference frequency of filtering mobile terminal according to an exemplary embodiment one; The said method that the present embodiment utilizes disclosure embodiment to provide, how to adjust the second center frequency point and to carry out exemplary illustration in conjunction with Figure 1B, as shown in Figure 2, comprises the steps:
In step s 201, the interference signal of the FPDP from USB data line is received.
In one embodiment, the interference signal interference signal to mobile terminal that can be formed by USB charger or the idiophrenic intrinsic interference of electricity for mobile terminal.
In step S202, by the first center frequency point of the signal strength signal intensity in frequency spectrum detection electric circuit inspection interference signal and interference signal.
In one embodiment, frequency spectrum detection circuit can see the frequency spectrum detection circuit in correlation technique, and the disclosure is not described in detail in this.
In step S203, determine the capacitance of the variable capacitance of the wave invigorating network being arranged in USB data line according to signal strength signal intensity and the first center frequency point.
The description of step S203 see the description of above-mentioned steps S102, can be not described in detail in this.
In step S204, the electric capacity in wave invigorating network is adjusted to capacitance.
In step S205, according to the second center frequency point of the capacitance adjustment wave invigorating network after adjustment, make the first center frequency point identical with the second center frequency point.
As shown in Figure 1B, after mobile terminal 10 is connected with notebook or USB connector 12 by USB data line 11, frequency spectrum detection circuit 13 identifies signal strength signal intensity from the interference signal of USB data line 11 and the first center frequency point; Signal strength signal intensity and the first center frequency point are fed back to the control module 14 of variable capacitance by frequency spectrum detection circuit 13, the control module 14 of variable capacitance controls the variable capacitance in the wave invigorating network 15 in USB data line 11 again according to signal strength signal intensity and the first center frequency point, thus play the function of the second center frequency point of adjustment wave invigorating network, the clutter of many groups that real-time filtering USB data line produces interference.
The present embodiment is on the basis with above-described embodiment, by frequency spectrum detection electric circuit inspection to signal strength signal intensity and the first center frequency point control the capacitance of the variable capacitance of the wave invigorating network in USB data line, achieve the second center frequency point of adjustment wave invigorating network, can the center frequency point of specific aim filtering interference signals.
Fig. 3 is the block diagram of the device of the interference frequency of a kind of filtering mobile terminal according to an exemplary embodiment, and as shown in Figure 3, the device of the interference frequency of filtering mobile terminal comprises:
First determination module 31, is configured to determine the first center frequency point of signal strength signal intensity from the interference signal of USB data line and interference signal;
First adjusting module 32, is configured to the electric capacity that the signal strength signal intensity determined according to the first determination module 31 and the adjustment of the first center frequency point are arranged in the wave invigorating network of USB data line;
Second adjusting module 33, is configured to the second center frequency point filtering of the electric capacity adjustment wave invigorating network after adjusting according to the first adjusting module 32, makes the first center frequency point identical with the second center frequency point.
Fig. 4 is the block diagram of the device of the interference frequency of another kind of filtering mobile terminal according to an exemplary embodiment, and as shown in Figure 4, on above-mentioned basis embodiment illustrated in fig. 3, in one embodiment, the first determination module 31 can comprise:
Receive submodule 311, be configured to receive the interference signal from the FPDP of USB data line;
Detection sub-module 312, is configured to the first center frequency point being received signal strength signal intensity in the interference signal that receives of submodule 311 and interference signal by frequency spectrum detection electric circuit inspection.
In one embodiment, the first adjusting module 32 can comprise:
Determine submodule 321, be configured to the capacitance according to signal strength signal intensity and the first center frequency point determination wave invigorating network;
Adjustment submodule 322, is configured to the electric capacity in wave invigorating network is adjusted to the capacitance determining that submodule 321 is determined.
In one embodiment, wave invigorating network can be passive twin-T network, and the second center frequency point is F=1/2 π (R*C), and wherein, R is the resistance in wave invigorating network, and C is the capacitance value in wave invigorating network, and π is constant.
About the device in above-described embodiment, wherein the concrete mode of modules executable operations has been described in detail in about the embodiment of the method, will not elaborate explanation herein.
Fig. 5 is a kind of block diagram being applicable to mobile terminal defense device according to an exemplary embodiment.Such as, device 500 can be mobile phone, computer, digital broadcast terminal, messaging devices, game console, flat-panel devices, Medical Devices, body-building equipment, personal digital assistant etc.
With reference to Fig. 5, device 500 can comprise following one or more assembly: processing components 502, memory 504, power supply module 506, multimedia groupware 508, audio-frequency assembly 510, the interface 512 of I/O (I/O), sensor cluster 514, and communications component 516.
The integrated operation of the usual control device 500 of processing components 502, such as with display, call, data communication, camera operation and record operate the operation be associated.Treatment element 502 can comprise one or more processor 520 to perform instruction, to complete all or part of step of above-mentioned method.In addition, processing components 502 can comprise one or more module, and what be convenient between processing components 502 and other assemblies is mutual.Such as, processing unit 502 can comprise multi-media module, mutual with what facilitate between multimedia groupware 508 and processing components 502.
Memory 504 is configured to store various types of data to be supported in the operation of equipment 500.The example of these data comprises the instruction of any application program for operating on device 500 or method, contact data, telephone book data, message, picture, video etc.Memory 504 can be realized by the volatibility of any type or non-volatile memory device or their combination, as static RAM (SRAM), Electrically Erasable Read Only Memory (EEPROM), Erasable Programmable Read Only Memory EPROM (EPROM), programmable read only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, disk or CD.
The various assemblies that electric power assembly 506 is device 500 provide electric power.Electric power assembly 506 can comprise power-supply management system, one or more power supply, and other and the assembly generating, manage and distribute electric power for device 500 and be associated.
Multimedia groupware 508 is included in the screen providing an output interface between described device 500 and user.In certain embodiments, screen can comprise liquid crystal display (LCD) and touch panel (TP).If screen comprises touch panel, screen may be implemented as touch-screen, to receive the input signal from user.Touch panel comprises one or more touch sensor with the gesture on sensing touch, slip and touch panel.Described touch sensor can the border of not only sensing touch or sliding action, but also detects the duration relevant to described touch or slide and pressure.In certain embodiments, multimedia groupware 508 comprises a front-facing camera and/or post-positioned pick-up head.When equipment 500 is in operator scheme, during as screening-mode or video mode, front-facing camera and/or post-positioned pick-up head can receive outside multi-medium data.Each front-facing camera and post-positioned pick-up head can be fixing optical lens systems or have focal length and optical zoom ability.
Audio-frequency assembly 510 is configured to export and/or input audio signal.Such as, audio-frequency assembly 510 comprises a microphone (MIC), and when device 500 is in operator scheme, during as call model, logging mode and speech recognition mode, microphone is configured to receive external audio signal.The audio signal received can be stored in memory 504 further or be sent via communications component 516.In certain embodiments, audio-frequency assembly 510 also comprises a loud speaker, for output audio signal.
I/O interface 512 is for providing interface between processing components 502 and peripheral interface module, and above-mentioned peripheral interface module can be keyboard, some striking wheel, button etc.These buttons can include but not limited to: home button, volume button, start button and locking press button.
Sensor cluster 514 comprises one or more transducer, for providing the state estimation of various aspects for device 500.Such as, sensor cluster 514 can detect the opening/closing state of equipment 500, the relative positioning of assembly, such as described assembly is display and the keypad of device 500, the position of all right checkout gear 500 of sensor cluster 514 or device 500 1 assemblies changes, the presence or absence that user contacts with device 500, the variations in temperature of device 500 orientation or acceleration/deceleration and device 500.Sensor cluster 514 can comprise proximity transducer, be configured to without any physical contact time detect near the existence of object.Sensor cluster 514 can also comprise optical sensor, as CMOS or ccd image sensor, for using in imaging applications.In certain embodiments, this sensor cluster 514 can also comprise acceleration transducer, gyro sensor, Magnetic Sensor, pressure sensor or temperature sensor.
Communications component 516 is configured to the communication being convenient to wired or wireless mode between device 500 and other equipment.Device 500 can access the wireless network based on communication standard, as WiFi, 2G or 3G, or their combination.In one exemplary embodiment, communication component 516 receives from the broadcast singal of external broadcasting management system or broadcast related information via broadcast channel.In one exemplary embodiment, described communication component 516 also comprises near-field communication (NFC) module, to promote junction service.Such as, can based on radio-frequency (RF) identification (RFID) technology in NFC module, Infrared Data Association (IrDA) technology, ultra broadband (UWB) technology, bluetooth (BT) technology and other technologies realize.
In the exemplary embodiment, device 500 can be realized, for performing said method by one or more application specific integrated circuit (ASIC), digital signal processor (DSP), digital signal processing appts (DSPD), programmable logic device (PLD), field programmable gate array (FPGA), controller, microcontroller, microprocessor or other electronic components.
In the exemplary embodiment, additionally provide a kind of non-transitory computer-readable recording medium comprising instruction, such as, comprise the memory 504 of instruction, above-mentioned instruction can perform said method by the processor 520 of device 500.Such as, described non-transitory computer-readable recording medium can be ROM, random access memory (RAM), CD-ROM, tape, floppy disk and optical data storage devices etc.
Those skilled in the art, at consideration specification and after putting into practice disclosed herein disclosing, will easily expect other embodiment of the present disclosure.The application is intended to contain any modification of the present disclosure, purposes or adaptations, and these modification, purposes or adaptations are followed general principle of the present disclosure and comprised the undocumented common practise in the art of the disclosure or conventional techniques means.Specification and embodiment are only regarded as exemplary, and true scope of the present disclosure and spirit are pointed out by claim below.
Should be understood that, the disclosure is not limited to precision architecture described above and illustrated in the accompanying drawings, and can carry out various amendment and change not departing from its scope.The scope of the present disclosure is only limited by appended claim.
Claims (9)
1. a method for the interference frequency of filtering mobile terminal, is characterized in that, described method comprises:
Determine the first center frequency point of signal strength signal intensity from the interference signal of USB data line and described interference signal;
The capacitance of the variable capacitance of the wave invigorating network of described USB data line is arranged according to described signal strength signal intensity and described first center frequency point adjustment;
Adjust the second center frequency point of described wave invigorating network according to the described capacitance after adjustment, make described first center frequency point identical with described second center frequency point.
2. method according to claim 1, is characterized in that, described the first center frequency point determining the signal strength signal intensity from the interference signal of USB data line and described interference signal, comprising:
Receive the interference signal from the FPDP of USB data line;
By the first center frequency point of the signal strength signal intensity in interference signal described in frequency spectrum detection electric circuit inspection and described interference signal.
3. method according to claim 1, is characterized in that, the described capacitance being arranged in the variable capacitance of the wave invigorating network of described USB data line according to described signal strength signal intensity and described first center frequency point adjustment, comprising:
The capacitance of the needs of the variable capacitance of the wave invigorating network being arranged in described USB data line is determined according to described signal strength signal intensity and described first center frequency point;
The capacitance of the variable capacitance in described wave invigorating network is adjusted to the capacitance of described needs.
4. method according to claim 1, it is characterized in that, described wave invigorating network is passive twin-T network, described second center frequency point is F=1/2 π (R*C), wherein, R is the resistance of the resistance in described wave invigorating network, and C is the capacitance of the variable capacitance in described wave invigorating network, and π is constant.
5. a device for the interference frequency of filtering mobile terminal, is characterized in that, described device comprises:
First determination module, is configured to determine the first center frequency point of signal strength signal intensity from the interference signal of USB data line and described interference signal;
First adjusting module, is configured to the capacitance that the described signal strength signal intensity determined according to described first determination module and described first center frequency point adjustment are arranged in the variable capacitance of the wave invigorating network of described USB data line;
Second adjusting module, is configured to the second center frequency point that the described capacitance after according to described first adjusting module adjustment adjusts described wave invigorating network, makes described first center frequency point identical with described second center frequency point.
6. device according to claim 5, is characterized in that, described first determination module comprises:
Receive submodule, be configured to receive the interference signal from the FPDP of USB data line;
Detection sub-module, is configured to the first center frequency point by receiving signal strength signal intensity in described interference signal that submodule receives and described interference signal described in frequency spectrum detection electric circuit inspection.
7. device according to claim 5, is characterized in that, described first adjusting module comprises:
Determine submodule, be configured to the capacitance determining the needs of the variable capacitance of described wave invigorating network according to described signal strength signal intensity and described first center frequency point;
Adjustment submodule, is configured to the capacitance of the variable capacitance in described wave invigorating network is adjusted to the described capacitance determining the described needs that submodule is determined.
8. device according to claim 5, it is characterized in that, described wave invigorating network is passive twin-T network, described second center frequency point is F=1/2 π (R*C), wherein, R is the resistance of the resistance in described wave invigorating network, and C is the capacitance of the variable capacitance in described wave invigorating network, and π is constant.
9. a device for the interference frequency of filtering mobile terminal, is characterized in that, described device comprises:
Processor;
For the memory of storage of processor executable instruction;
Wherein, described processor is configured to:
Determine the first center frequency point of signal strength signal intensity from the interference signal of USB data line and described interference signal;
The capacitance of the variable capacitance of the wave invigorating network of described USB data line is arranged according to described signal strength signal intensity and described first center frequency point adjustment;
Adjust the second center frequency point of described wave invigorating network according to the described capacitance after adjustment, make described first center frequency point identical with described second center frequency point.
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| CN105357355A (en) * | 2015-11-10 | 2016-02-24 | 广东欧珀移动通信有限公司 | Communication terminal, and control method and control apparatus for working state antenna assembly of communication terminal |
| CN106454944A (en) * | 2016-09-20 | 2017-02-22 | 乐视控股（北京）有限公司 | Data transmission method, apparatus and terminal |
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