CN106160760A - The harmonic suppressing method of a kind of cyclical signal and mobile terminal - Google Patents
The harmonic suppressing method of a kind of cyclical signal and mobile terminal Download PDFInfo
- Publication number
- CN106160760A CN106160760A CN201610615068.XA CN201610615068A CN106160760A CN 106160760 A CN106160760 A CN 106160760A CN 201610615068 A CN201610615068 A CN 201610615068A CN 106160760 A CN106160760 A CN 106160760A
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- Prior art keywords
- signal
- mobile terminal
- cyclical
- trap
- interference
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
- H04B1/109—Means associated with receiver for limiting or suppressing noise or interference by improving strong signal performance of the receiver when strong unwanted signals are present at the receiver input
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B15/00—Suppression or limitation of noise or interference
- H04B15/02—Reducing interference from electric apparatus by means located at or near the interfering apparatus
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/58—Anti-side-tone circuits
Abstract
Embodiments providing harmonic suppressing method and the mobile terminal of a kind of cyclical signal, this mobile terminal includes: signal output apparatus, controller and tunable filtering circuit；Wherein, described signal output apparatus, it is used for exporting cyclical signal；Described controller includes: interference band determines module, for when described cyclical signal being detected, determines the interference band that communications band residing for described mobile terminal is interfered by described cyclical signal；Trap signal output module, for according to described interference band output filtering signal；Described tunable filtering circuit, for filtering in described cyclical signal according to described trap signal, is in the harmonic component of described interference band.The embodiment of the present invention improves Radio frequency interference, again minimum radius to greatest extent affects signal edge, improves the quality improving Radio frequency interference, simultaneously, it is to avoid regulating frequency, it is to avoid the dutycycle of regulation signal, substantially increases the practicality improving Radio frequency interference.
Description
Technical field
The present invention relates to communication technical field, the harmonic suppressing method and the one that particularly relate to a kind of cyclical signal are mobile
Terminal.
Background technology
Along with the development of mobile communication technology, mobile terminal has become as a part indispensable in people's life, real
Show the most accessible call, and, a lot of conventional functions that mobile terminal is comprised, bring just to people's life
Profit.
In the terminal, MIPI (Mobile Industry Processor Interface, mobile Industry Processor
Interface) or the signal frequency multiplication such as clock easily cause Radio frequency interference, cause communication quality to decline.
At present, generally series inductance or magnetic bead, shunt capacitance, series inductance or magnetic bead can contain height in the terminal
Frequency passes through, and shunt capacitance can produce the effect of high-frequency signal shorted to earth, filters higher harmonic components in this signal based on this, reaches
To the purpose improving interference.
But, harmonic attenuation amplitude sometimes hour, the improvement for interference is inconspicuous；When harmonic attenuation amplitude is big, due to
Signal rising edge is required increasingly stricter (as rising edge/trailing edge requires less than certain value), filters higher harmonic components
Mode can affect signal edge signal rise/fall time so that the quality (edge sequential) of signal is unsatisfactory for requirement, and improvement is penetrated
It is second-rate that frequency disturbs.
Further, it is also possible to improve Radio frequency interference intensity by modes etc. such as frequency hopping (regulating frequency point), regulation dutycycles.
But, this mode limits relatively big, and poor practicability can not use in some scene, such as, and the clock letter of photographic head
Number requiring dutycycle 50% ± 10%, now dutycycle is unadjustable.
Summary of the invention
The embodiment of the present invention provides the harmonic suppressing method of a kind of cyclical signal and mobile terminal, with solve connection inductance or
Magnetic bead, shunt capacitance improve the second-rate of Radio frequency interference, and the mode such as frequency hopping, regulation dutycycle improves the practicality of Radio frequency interference
The problem of difference.
First aspect, it is provided that a kind of mobile terminal, including:
Signal output apparatus, controller and tunable filtering circuit；Wherein,
Described signal output apparatus, is used for exporting cyclical signal；
Described controller includes:
Interference band determines module, for when described cyclical signal being detected, determines that described cyclical signal is to institute
State the interference band that communications band residing for mobile terminal interferes；
Trap signal output module, for according to described interference band output filtering signal；
Described tunable filtering circuit, for filtering in described cyclical signal according to described trap signal, is in described
The harmonic component of interference band.
Second aspect, it is provided that the harmonic suppressing method of a kind of cyclical signal, applies in the terminal, described movement
Terminal includes that method described in signal output apparatus, controller and tunable filtering circuit includes:
Described signal output apparatus output cyclical signal；
Described controller, when described cyclical signal being detected, determines that described cyclical signal is to described mobile terminal institute
The interference band that place's communications band interferes, according to described interference band output filtering signal；
Described tunable filtering circuit filters in described cyclical signal according to described trap signal, is in described interference frequency
The harmonic component of section.
So, in the embodiment of the present invention, when signal output apparatus output cyclical signal, if it is determined that cyclical signal
Disturb communications band residing for described mobile terminal, then can be by, in tunable filtering circuit property filter cycle signal, being in dry
The harmonic component of scrambling section, rising, trailing edge impact on signal are less, by by the neighbouring harmonic component of cyclical signal
Filtering, improving Radio frequency interference, again minimum radius to greatest extent affects signal edge, improves the quality improving Radio frequency interference, with
Time, it is to avoid regulating frequency, it is to avoid the dutycycle of regulation signal, still it is suitable in some restricted scene, substantially increases
Improve the practicality of Radio frequency interference.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, below by institute in the description to the embodiment of the present invention
The accompanying drawing used is needed to be briefly described, it should be apparent that, the accompanying drawing in describing below is only some enforcements of the present invention
Example, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to attached according to these
Figure obtains other accompanying drawing.
Fig. 1 is the structured flowchart of a kind of mobile terminal of the present invention；
Fig. 2 is the structural representation of a kind of tunable filtering circuit of the embodiment of the present invention；
Fig. 3 is the block diagram of a kind of trap signal output module of the embodiment of the present invention；
Fig. 4 A and Fig. 4 B is the filtering exemplary plot of a kind of trap circuit of the embodiment of the present invention；
Fig. 5 is the structured flowchart of the another kind of mobile terminal of the present invention；
Fig. 6 is the exemplary plot of the Shape correction of a kind of signal buffer of the embodiment of the present invention；
Fig. 7 is the flow chart of steps of the harmonic suppressing method embodiment of a kind of cyclical signal of the present invention；
Fig. 8 is the flow chart of steps of the harmonic suppressing method embodiment of the another kind of cyclical signal of the present invention；
Fig. 9 is the block diagram of the mobile terminal of another embodiment of the present invention；
Figure 10 is the structural representation of the mobile terminal of another embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe, it is clear that described embodiment is a part of embodiment of the present invention rather than whole embodiments wholely.Based on this
Embodiment in bright, the every other enforcement that those of ordinary skill in the art are obtained under not making creative work premise
Example, broadly falls into the scope of protection of the invention.
Embodiment one
With reference to Fig. 1, it is shown that the structured flowchart of a kind of mobile terminal of the present invention.
In implementing, this mobile terminal 100 can include mobile phone, panel computer, personal digital assistant, wearable device
(such as glasses, wrist-watch etc.) etc..
The operating system of these mobile terminals 100 can include Android (Android), IOS, Windows Phone,
Windows etc., this is not any limitation as by the embodiment of the present invention.
In embodiments of the present invention, signal output apparatus 110, controller 120 and can be included in the mobile terminal 100
Tunable filter circuit 130.
Signal output apparatus 110, is used for exporting cyclical signal.
Such as, signal output apparatus 110 can include that MIPI generator or clock generator etc., i.e. cyclical signal can
To include MIPI signal, clock signal etc..
In implementing, this signal output apparatus 110 may be mounted at CPU (Central Processing Unit,
Central processing unit), more liquid crystal display module, photographic head module, transceiver Transceiver, power amplifier PA, hilted broadsword throw and open
In the components and parts such as pass.
The control of harmonics restraint is responsible for by controller 120, and in embodiments of the present invention, controller 120 can include such as lower mold
Block:
Interference band determines module 121, for when cyclical signal being detected, determines that cyclical signal is to described movement
The interference band that communications band residing for terminal interferes.
Trap signal output module 122, for according to interference band output filtering signal.
In actual applications, in certain memorizer of mobile terminal 100, have recorded signal output apparatus 110 and producing
The interference band of interference.
When signal output apparatus 110 exports cyclical signal, controller 120 can be mobile eventually by radio-frequency module inquiry
Communications band residing for end.
If the interference band that this communications band stores with memorizer, signal output apparatus 110 produces interference mates, then
May determine that communications band residing for cyclical signal interfering mobile terminal.
When determining communications band residing for cyclical signal interfering mobile terminal 100, controller 120 can generate filtration letter
Number, and this trap signal is sent to tunable filtering circuit 130.
Tunable filtering circuit 130, according to trap signal property filter cycle signal 130, is in interference band
Harmonic component.
In actual applications, cyclical signal, after Fourier transformation, can resolve into large number of sine wave, its
The sinusoidal amplitude that medium frequency is low is relatively big, and the sinusoidal amplitude that frequency is high is less.
Tunable filtering circuit 130 can be resonance circuit, has relatively near the frequency (i.e. interference band) needing filtration
Strong filter effect, rising, trailing edge impact on signal are less, by the neighbouring harmonic component of cyclical signal being filtered
Removing, improving Radio frequency interference, again minimum radius to greatest extent affects signal edge.
In an alternate embodiment of the present invention where, as in figure 2 it is shown, tunable filtering circuit 130 can include at least one
Individual trap circuit 210, this at least one trap circuit 210 can form array.
When mobile terminal 100 is in different communications bands, different trap circuits 310 can be for different communication
Frequency range is filtered.
In actual applications, trap circuit 210 can include electric capacity 211 and an inductance 212 of series connection.
In a kind of alternative embodiment of the present invention, with reference to the block diagram of the trap signal output module shown in Fig. 3, filter letter
Number output module 122 can include following submodule further:
Parameter value calculation submodule 1221, for calculating capacitance and inductance value according to interference band；
Parameter value generates submodule 1222, is used for using capacitance to generate trap signal with described inductance value.
Comparatively speaking, tunable filtering circuit 130 can be also used for:
Electric capacity 211 adjusted to capacitance, inductance 212 adjusted to inductance value, so that trap circuit 210 is at interference band
Impedance less than preset impedance threshold.
In embodiments of the present invention, electric capacity 211 is connected with inductance 212 can form trap circuit 210, trap circuit 210
Impedance together decided on inductance 212 by electric capacity 211, referring specifically to equation below:
Wherein, ZsFor impedance, L is inductance, and C is electric capacity.
When ω L and 1/ ω C is equal, the impedance of trap circuit 210 is equal to 0, and now impedance is minimum.
Now,
Wherein, f is frequency, by the regulation inductance value of inductance L, the capacitance of electric capacity C, trap circuit 210 can be made to exist
Under specific frequency f, impedance is 0, or the least, and impedance is not 0 when other frequencies, or the biggest.
Trap circuit 210 is parallel to signal output apparatus, can play and specific frequency f (such as interference band) is connect
The effect of ground short circuit, filtering harmonics component.
It should be noted that trap circuit 210 is under specific frequency f, ideally impedance is adjusted to 0, but,
In actual applications, trap circuit 210 is under specific frequency f, and the most difficult by impedance adjustment most 0, therefore, impedance is less
(showing as less than the impedance threshold preset) is also in the range of accepting.
In one example, as shown in Figure 4 A, the capacitance of electric capacity 211 is 1.9pF, and the inductance value of inductance 212 is
15nH, at a m2, frequency freq=21.00MHz, dB (SP1.SP.S (1,2))=-0.000, at a m1, frequency freq
=921.0MHz, dB (SP1.SP.S (1,2))=-17.104.
In this example, if cyclical signal creates interference at 921.0MHz (noise spot), then can be according to electric capacity
Value 1.9pF adjusts electric capacity 211, adjusts inductance 212 according to inductance value 15nH, can produce at 921.0MHz and preferably filter effect
Really, the effect of reduction interference is served.
In another example, as shown in Figure 4 B, the capacitance of electric capacity 211 is 1.8pF, and the inductance value of inductance 212 is
15nH, at a m2, freq=21.00MHz, dB (SP1.SP.S (1,2))=-0.000, at a m1, freq=
941.0MHz, dB (SP1.SP.S (1,2))=-19.813.
In this example, if cyclical signal creates interference at 941.0MHz (noise spot), then can be according to electric capacity
Value 1.8pF adjusts electric capacity 211, adjusts inductance 212 according to inductance value 15nH, can produce at 941.0MHz and preferably filter effect
Really, the effect of reduction interference is served.
So, in the embodiment of the present invention, when signal output apparatus output cyclical signal, if it is determined that cyclical signal
Disturb communications band residing for described mobile terminal, then can be by, in tunable filtering circuit property filter cycle signal, being in dry
The harmonic component of scrambling section, rising, trailing edge impact on signal are less, by by the neighbouring harmonic component of cyclical signal
Filtering, improving Radio frequency interference, again minimum radius to greatest extent affects signal edge, improves the quality improving Radio frequency interference, with
Time, it is to avoid regulating frequency, it is to avoid the dutycycle of regulation signal, still it is suitable in some restricted scene, substantially increases
Improve the practicality of Radio frequency interference.
Embodiment two
With reference to Fig. 5, it is shown that the structured flowchart of the another kind of mobile terminal of the present invention.
In implementing, this mobile terminal 500 includes signal output apparatus 510, signal buffer 520, controller
530, connecting valve 540, tunable filtering circuit 550, block isolating device 560.
Signal output apparatus 510, is used for exporting cyclical signal.
Signal buffer 520, also known as Buffer, can connect with signal output apparatus 510, for entering cyclical signal
Row Shape correction.
In embodiments of the present invention, as shown in Figure 6, signal 610 (such as the cyclical signal) rising edge before Shape correction with
Trailing edge is relatively slower, and after Shape correction, signal 620 (such as the cyclical signal) rising edge of meeting compares steep with trailing edge
High and steep.
In embodiments of the present invention, controller 530 can include such as lower module:
Interference band determines module 531, for when cyclical signal being detected, determines that cyclical signal is to mobile terminal
The interference band that communications band residing for 500 interferes.
Trap signal output module 532, for according to interference band output filtering signal.
Connecting signal output module 533, for when determining that described cyclical signal disturbs described communications band, output is even
Connect signal.
Cut-off signal output module 534, for determining that cyclical signal does not interferes with communications band residing for mobile terminal 500
Time, export cut-off signal.
In actual applications, in certain memorizer of mobile terminal 500, have recorded signal output apparatus 510 and producing
The interference band of interference.
For components and parts such as some screen, photographic head modules, possible comparison is accurate, and the harmonic wave itself produced is the least,
Communications band residing for mobile terminal 500 may not produced interference, or interference is the most weak, then, now can not start filtering.
If components and parts such as some screen, photographic head modules, possible comparison is coarse, and the harmonic wave itself produced is relatively big,
Communication frequency residing for mobile terminal 500 may be produced interference, then, now can start filtering.
When signal output apparatus 510 exports cyclical signal, controller 530 can be mobile eventually by radio-frequency module inquiry
End communications band residing for 500.
If the interference band that this communications band stores with memorizer, signal output apparatus 510 produces interference mates, then
May determine that the communications band residing for cyclical signal interfering mobile terminal 500, otherwise, then may determine that cyclical signal is not done
Disturb the communications band residing for mobile terminal 500.
When determining communication frequency residing for cyclical signal interfering mobile terminal 500, controller 530 can generate connection letter
Number, and, transmission connection signal to connecting valve 540, to connect signal output apparatus 510 and tunable filtering circuit 550.
When determining that cyclical signal does not interferes with communication frequency residing for mobile terminal 500, controller 530 can generate disconnection
Connect signal, and, transmission cut-off signal to connecting valve 540, with cut-off signal output circuit 510 and tunable filtering circuit
The connection of 550.
Connecting valve 540, can connect with tunable filtering circuit 550, be used for:
According to according to connecting signal connection signal output apparatus 510 and tunable filtering circuit 550.
According to the connection of cut-off signal cut-off signal output circuit 510 with tunable filtering circuit 550, reduce disappearing of resource
Consumption.
Tunable filtering circuit 550, according to trap signal property filter cycle signal, is in the harmonic wave of interference band
Component.
In embodiments of the present invention, if cyclical signal is through Shape correction, then tunable filtering circuit 550 can depend on
Filter in the cyclical signal after Shape correction according to trap signal, be in the harmonic component of interference band.
Block isolating device 560, can connect with tunable filtering circuit 550, be used for filtering tunable filtering circuit 550 and/or
The direct current signal that controller 530 produces.
In embodiments of the present invention, block isolating device 560 can hinder direct current by exchange (high fdrequency component), prevents tunable filter
Wave circuit 550 and/or the issuable direct current signal of controller 510 produce impact to cyclical signal.
Embodiment three
With reference to Fig. 7, it is shown that the flow chart of steps of the harmonic suppressing method embodiment of a kind of cyclical signal of the present invention,
Can apply in the terminal, mobile terminal includes signal output apparatus, controller and tunable filtering circuit, the most permissible
Comprise the steps:
Step 701, described signal output apparatus output cyclical signal.
Step 702, described controller, when described cyclical signal being detected, determines that described cyclical signal is to described shifting
The interference band that communications band residing for dynamic terminal interferes.
Step 703, according to described interference band output filtering signal.
Step 704, described tunable filtering circuit filters in described cyclical signal according to described trap signal, is in institute
State the harmonic component of interference band.
In implementing, described tunable filtering circuit includes at least one trap circuit；Described trap circuit includes
One electric capacity of series connection and an inductance；
Controller, when output filtering signal, can calculate capacitance and inductance value according to described interference band；Use institute
State capacitance and generate trap signal with described inductance value.
Described electric capacity, when filtering, can be adjusted to described capacitance, be adjusted by described inductance by tunable filtering circuit
To described inductance value, so that described trap circuit is less than, in the impedance of described interference band, the impedance threshold preset.
In embodiments of the present invention, due to the application basic simlarity with embodiment one, so describe is fairly simple, relevant
Part sees the part of embodiment one and illustrates, the embodiment of the present invention is not described in detail at this.
So, in the embodiment of the present invention, when signal output apparatus output cyclical signal, if it is determined that cyclical signal
Disturb communications band residing for described mobile terminal, then can be by, in tunable filtering circuit property filter cycle signal, being in dry
The harmonic component of scrambling section, rising, trailing edge impact on signal are less, by by the neighbouring harmonic component of cyclical signal
Filtering, improving Radio frequency interference, again minimum radius to greatest extent affects signal edge, improves the quality improving Radio frequency interference, with
Time, it is to avoid regulating frequency, it is to avoid the dutycycle of regulation signal, still it is suitable in some restricted scene, substantially increases
Improve the practicality of Radio frequency interference.
Embodiment four
With reference to Fig. 8, it is shown that the steps flow chart of the harmonic suppressing method embodiment of the another kind of cyclical signal of the present invention
Figure, can apply in the terminal, mobile terminal include signal output apparatus, signal buffer, controller, connecting valve,
Tunable filtering circuit and block isolating device, specifically may include steps of:
Step 801, described signal output apparatus output cyclical signal.
Step 802, described signal buffer carries out Shape correction to described cyclical signal.
Step 803, described controller is when determining that described cyclical signal disturbs described communications band, and output connects letter
Number.
Step 804, it is tunable with described that described connecting valve connects described signal output apparatus according to described connection signal
Filter circuit.
Step 805, described controller, when described cyclical signal being detected, determines that described cyclical signal is to described shifting
The interference band that communications band residing for dynamic terminal interferes.
Step 806, according to described interference band output filtering signal.
Step 807, described tunable filtering circuit filters in described cyclical signal according to described trap signal, is in institute
State the harmonic component of interference band.
Step 808, described block isolating device filters the direct current letter of described tunable filtering circuit and/or the generation of described controller
Number.
Step 809, described controller is determining that described cyclical signal does not interferes with communications band residing for described mobile terminal
Time, export cut-off signal.
Step 810, it is tunable with described that described connecting valve disconnects described signal output apparatus according to described cut-off signal
The connection of filter circuit.
In embodiments of the present invention, due to the application basic simlarity with embodiment two, so describe is fairly simple, relevant
Part sees the part of embodiment two and illustrates, the embodiment of the present invention is not described in detail at this.
It should be noted that for embodiment of the method, in order to be briefly described, therefore it is all expressed as a series of action group
Closing, but those skilled in the art should know, the embodiment of the present invention is not limited by described sequence of movement, because depending on
According to the embodiment of the present invention, some step can use other orders or carry out simultaneously.Secondly, those skilled in the art also should
Knowing, embodiment described in this description belongs to preferred embodiment, and the involved action not necessarily present invention implements
Necessary to example.
Embodiment five
Fig. 9 is the block diagram of the mobile terminal of another embodiment of the present invention.Mobile terminal 900 shown in Fig. 9 includes: at least
One processor 901, memorizer 902, at least one network interface 904, other user interfaces 903 and the harmonic wave of cyclical signal
Suppression circuit 906.Each assembly in mobile terminal 900 is coupled by bus system 905.It is understood that bus system
905 for realizing the connection communication between these assemblies.Bus system 905, in addition to including data/address bus, also includes that power supply is total
Line, control bus and status signal bus in addition.But for the sake of understanding explanation, in fig .9 various buses are all designated as total linear system
System 905.
Wherein, user interface 903 can include display, keyboard or pointing device (such as, mouse, trace ball
(trackball), touch-sensitive plate or touch screen etc..
The memorizer 902 being appreciated that in the embodiment of the present invention can be volatile memory or nonvolatile memory,
Maybe can include volatibility and nonvolatile memory.Wherein, nonvolatile memory can be read only memory (Read-
OnlyMemory, ROM), programmable read only memory (ProgrammableROM, PROM), Erasable Programmable Read Only Memory EPROM
(ErasablePROM, EPROM), Electrically Erasable Read Only Memory (ElectricallyEPROM, EEPROM) or sudden strain of a muscle
Deposit.Volatile memory can be random access memory (RandomAccessMemory, RAM), and it is used as outside the most slow
Deposit.By exemplary but be not restricted explanation, the RAM of many forms can use, such as static RAM
(StaticRAM, SRAM), dynamic random access memory (DynamicRAM, DRAM), Synchronous Dynamic Random Access Memory
(SynchronousDRAM, SDRAM), double data speed synchronous dynamic RAM (DoubleDataRate
SDRAM, DDRSDRAM), enhancement mode Synchronous Dynamic Random Access Memory (Enhanced SDRAM, ESDRAM), synchronized links
Dynamic random access memory (SynchlinkDRAM, SLDRAM) and direct rambus random access memory
(DirectRambusRAM, DRRAM).The memorizer 902 of the system and method that the embodiment of the present invention describes is intended to include but does not limits
In these and the memorizer of any other applicable type.
In some embodiments, memorizer 902 stores following element, executable module or data structure, or
Their subset of person, or their superset: operating system 9021 and application program 9022.
Wherein, operating system 9021, comprise various system program, such as ccf layer, core library layer, driving layer etc., be used for
Realize various basic business and process hardware based task.Application program 9022, comprises various application program, such as media
Player (MediaPlayer), browser (Browser) etc., be used for realizing various applied business.Realize embodiment of the present invention side
The program of method may be embodied in application program 9022.
In embodiments of the present invention, the harmonic suppression circuit 906 of cyclical signal includes:
Signal output apparatus, is used for exporting cyclical signal；
Tunable filtering circuit, for filtering in described cyclical signal according to described trap signal, is in interference band
Harmonic component.
In embodiments of the present invention, by calling program or the instruction of memorizer 902 storage, concrete, can be application
The program stored in program 9022 or instruction, processor 901, for when described cyclical signal being detected, determines the described cycle
The interference band that communications band residing for described mobile terminal is interfered by property signal；Believe according to described interference band output filtering
Number.
The method that the invention described above embodiment discloses can apply in processor 901, or is realized by processor 901.
Processor 901 is probably a kind of IC chip, has the disposal ability of signal.During realizing, said method each
Step can be completed by the instruction of the integrated logic circuit of the hardware in processor 901 or software form.Above-mentioned process
Device 901 can be general processor, digital signal processor (DigitalSignalProcessor, DSP), special IC
(ApplicationSpecific IntegratedCircuit, ASIC), ready-made programmable gate array
(FieldProgrammableGateArray, FPGA) or other PLDs, discrete gate or transistor logic
Device, discrete hardware components.Can realize or perform disclosed each method, step and the box in the embodiment of the present invention
Figure.The processor etc. that general processor can be microprocessor or this processor can also be any routine.In conjunction with the present invention
The step of the method disclosed in embodiment can be embodied directly in hardware decoding processor and perform, or uses decoding processor
In hardware and software module combination execution complete.Software module may be located at random access memory, and flash memory, read only memory can
In the storage medium that this areas such as program read-only memory or electrically erasable programmable memorizer, depositor are ripe.This storage
Medium is positioned at memorizer 902, and processor 901 reads the information in memorizer 902, completes the step of said method in conjunction with its hardware
Suddenly.
It is understood that the embodiment of the present invention describe these embodiments can use hardware, software, firmware, middleware,
Microcode or a combination thereof realize.Realizing for hardware, processing unit can be implemented at least one special IC
(ApplicationSpecificIntegratedCircuits, ASIC), digital signal processor
(DigitalSignalProcessing, DSP), digital signal processing appts (DSPDevice, DSPD), programmable logic device
(ProgrammableLogicDevice, PLD), field programmable gate array (Field-ProgrammableGateArray,
FPGA), general processor, controller, microcontroller, microprocessor, for performing other electronics list of herein described function
In unit or a combination thereof.
Software is realized, can come by performing the module (such as process, function etc.) of function described in the embodiment of the present invention
Realize the technology described in the embodiment of the present invention.Software code is storable in performing in memorizer and by processor.Memorizer can
Within a processor or to realize outside processor.
Alternatively, the harmonic suppression circuit 906 of cyclical signal also includes:
Signal buffer, for carrying out Shape correction to described cyclical signal.
Alternatively, the harmonic suppression circuit 906 of cyclical signal also includes:
Block isolating device, for filtering described tunable filtering circuit and/or the direct current signal of described controller generation.
Alternatively, the filtering circuit 906 of cyclical signal also includes connecting valve；
Processor 901 is additionally operable to:
When determining that described cyclical signal disturbs described communications band, output connects signal；
Connecting valve, for connecting described signal output apparatus and described tunable filtering electricity according to described connection signal
Road.
Alternatively, the filtering circuit 906 of cyclical signal also includes connecting valve；
Processor 901 is additionally operable to:
When determining that described cyclical signal does not interferes with communications band residing for described mobile terminal, export cut-off signal；
Connecting valve, for disconnecting described signal output apparatus and described tunable filtering circuit according to described cut-off signal
Connection.
Alternatively, described tunable filtering circuit includes at least one trap circuit；Described trap circuit includes series connection
One electric capacity and an inductance；
Processor 901 is additionally operable to:
Capacitance and inductance value is calculated according to described interference band；
Described capacitance is used to generate trap signal with described inductance value；
Described tunable filtering circuit is additionally operable to:
Described electric capacity is adjusted to described capacitance, described inductance is adjusted to described inductance value, so that described trap is electric
Road is less than, in the impedance of described interference band, the impedance threshold preset.
Mobile terminal 900 is capable of each process that in previous embodiment, mobile terminal realizes, for avoiding repeating, here
Repeat no more.
So, in the embodiment of the present invention, when signal output apparatus output cyclical signal, if it is determined that cyclical signal
Disturb communications band residing for described mobile terminal, then can be by, in tunable filtering circuit property filter cycle signal, being in dry
The harmonic component of scrambling section, rising, trailing edge impact on signal are less, by by the neighbouring harmonic component of cyclical signal
Filtering, improving Radio frequency interference, again minimum radius to greatest extent affects signal edge, improves the quality improving Radio frequency interference, with
Time, it is to avoid regulating frequency, it is to avoid the dutycycle of regulation signal, still it is suitable in some restricted scene, substantially increases
Improve the practicality of Radio frequency interference.
Embodiment nine
Figure 10 is the structural representation of the mobile terminal of another embodiment of the present invention.Specifically, the mobile end in Figure 10
End 1000 can be mobile phone, panel computer, personal digital assistant (PersonalDigital Assistant, PDA) or vehicle-mounted
Computer etc..
Mobile terminal 1000 in Figure 10 includes radio frequency (RadioFrequency, RF) circuit 1010, memorizer 1020, defeated
Enter unit 1030, display unit 1040, processor 1060, voicefrequency circuit 1070, WiFi (WirelessFidelity) module
100, the harmonic suppression circuit 1011 of power supply 1090 and cyclical signal.
Wherein, input block 1030 can be used for receiving numeral or the character information of user's input, and produce and move eventually
The user setup of end 1000 and function control relevant signal input.Specifically, in the embodiment of the present invention, this input block
1030 can include contact panel 1031.Contact panel 1031, also referred to as touch screen, can collect user and thereon or neighbouring touch
Touch operation (such as user uses any applicable object such as finger, stylus or adnexa operation on contact panel 1031), and
Corresponding attachment means is driven according to formula set in advance.Optionally, contact panel 1031 can include touch detecting apparatus and
Two parts of touch controller.Wherein, the touch orientation of touch detecting apparatus detection user, and detect the letter that touch operation brings
Number, transmit a signal to touch controller；Touch controller receives touch information from touch detecting apparatus, and is converted into
Contact coordinate, then give this processor 1060, and order that processor 1060 sends can be received and performed.Furthermore, it is possible to
The polytypes such as resistance-type, condenser type, infrared ray and surface acoustic wave are used to realize contact panel 1031.Except contact panel
1031, input block 1030 can also include other input equipments 1032, and other input equipments 1032 can include but not limited to
One or many in physical keyboard, function key (such as volume control button, switch key etc.), trace ball, mouse, action bars etc.
Kind.
Wherein, display unit 1040 can be used for showing the information inputted by user or the information being supplied to user and movement
The various menu interfaces of terminal 1000.Display unit 1040 can include display floater 1041, optionally, can use LCD or have
The forms such as machine light emitting diode (OrganicLight-EmittingDiode, OLED) configure display floater 1041.
It should be noted that contact panel 1031 can cover display floater 1041, formed and touch display screen, when this touch display screen
Detect thereon or after neighbouring touch operation, send processor 1060 to determine the type of touch event, with post processing
Device 1060 provides corresponding visual output according to the type of touch event on touch display screen.
Touch display screen and include Application Program Interface viewing area and conventional control viewing area.This Application Program Interface viewing area
And the arrangement mode of this conventional control viewing area does not limit, can be arranged above and below, left-right situs etc. can be distinguished two and show
Show the arrangement mode in district.This Application Program Interface viewing area is displayed for the interface of application program.Each interface is permissible
The interface elements such as the icon and/or the widget desktop control that comprise at least one application program.This Application Program Interface viewing area
It can also be the empty interface not comprising any content.This conventional control viewing area is for showing the control that utilization rate is higher, such as,
The application icons etc. such as settings button, interface numbering, scroll bar, phone directory icon.
Wherein processor 1060 is the control centre of mobile terminal 1000, utilizes various interface and the whole mobile phone of connection
Various piece, be stored in the software program in first memory 1021 and/or module by running or performing, and call and deposit
Storage data in second memory 1022, perform the various functions of mobile terminal 1000 and process data, thus to moving eventually
End 1000 carries out integral monitoring.Optionally, processor 1060 can include at least one processing unit.
In embodiments of the present invention, the filtering circuit 1011 of cyclical signal includes:
Signal output apparatus, is used for exporting cyclical signal；
Tunable filtering circuit, for filtering in described cyclical signal according to described trap signal, is in interference band
Harmonic component.
In embodiments of the present invention, by call the software program and/or module stored in this first memory 1021 and/
Or the data in this second memory 1022, processor 1060, for when described cyclical signal being detected, determines described week
The interference band that communications band residing for described mobile terminal is interfered by phase property signal；According to described interference band output filtering
Signal.
Alternatively, the harmonic suppression circuit 1011 of cyclical signal also includes:
Signal buffer, for carrying out Shape correction to described cyclical signal.
Alternatively, the harmonic suppression circuit 1011 of cyclical signal also includes:
Block isolating device, for filtering described tunable filtering circuit and/or the direct current signal of described controller generation.
Alternatively, the filtering circuit 1011 of cyclical signal also includes connecting valve；
Processor 1060 is additionally operable to:
When determining that described cyclical signal disturbs described communications band, output connects signal；
Connecting valve, for connecting described signal output apparatus and described tunable filtering electricity according to described connection signal
Road.
Alternatively, the filtering circuit 1011 of cyclical signal also includes connecting valve；
Processor 1060 is additionally operable to:
When determining that described cyclical signal does not interferes with communications band residing for described mobile terminal, export cut-off signal；
Connecting valve, for disconnecting described signal output apparatus and described tunable filtering circuit according to described cut-off signal
Connection.
Alternatively, described tunable filtering circuit includes at least one trap circuit；Described trap circuit includes series connection
One electric capacity and an inductance；
Processor 1060 is additionally operable to:
Capacitance and inductance value is calculated according to described interference band；
Described capacitance is used to generate trap signal with described inductance value；
Described tunable filtering circuit is additionally operable to:
Described electric capacity is adjusted to described capacitance, described inductance is adjusted to described inductance value, so that described trap is electric
Road is less than, in the impedance of described interference band, the impedance threshold preset.
Visible, so, in the embodiment of the present invention, when signal output apparatus output cyclical signal, if it is determined that the cycle
Property signal disturbing described in communications band residing for mobile terminal, then can by tunable filtering circuit property filter cycle signal,
It is in the harmonic component of interference band, less on the rising of signal, trailing edge impact, neighbouring humorous by by cyclical signal
Wave component filters, and improving Radio frequency interference, again minimum radius to greatest extent affects signal edge, improves and improves Radio frequency interference
Quality, is still suitable for, significantly in some restricted scene simultaneously, it is to avoid regulating frequency, it is to avoid the dutycycle of regulation signal
Improve the practicality improving Radio frequency interference.
Those of ordinary skill in the art are it is to be appreciated that combine that the disclosed embodiments in the embodiment of the present invention describe is each
The unit of example and algorithm steps, it is possible to being implemented in combination in of electronic hardware or computer software and electronic hardware.These
Function performs with hardware or software mode actually, depends on application-specific and the design constraint of technical scheme.Specialty
Technical staff specifically should can be used for using different methods to realize described function to each, but this realization should not
Think beyond the scope of this invention.
Those skilled in the art is it can be understood that arrive, for convenience and simplicity of description, the system of foregoing description,
The specific works process of device and unit, is referred to the corresponding process in preceding method embodiment, does not repeats them here.
In embodiment provided herein, it should be understood that disclosed apparatus and method, can be passed through other
Mode realizes.Such as, device embodiment described above is only schematically, such as, the division of described unit, it is only
A kind of logic function divides, actual can have when realizing other dividing mode, the most multiple unit or assembly can in conjunction with or
Person is desirably integrated into another system, or some features can be ignored, or does not performs.Another point, shown or discussed is mutual
Between coupling direct-coupling or communication connection can be the INDIRECT COUPLING by some interfaces, device or unit or communication link
Connect, can be electrical, machinery or other form.
The described unit illustrated as separating component can be or may not be physically separate, shows as unit
The parts shown can be or may not be physical location, i.e. may be located at a place, or can also be distributed to multiple
On NE.Some or all of unit therein can be selected according to the actual needs to realize the mesh of the present embodiment scheme
's.
It addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, it is also possible to
It is that unit is individually physically present, it is also possible to two or more unit are integrated in a unit.
If described function is using the form realization of SFU software functional unit and as independent production marketing or use, permissible
It is stored in a computer read/write memory medium.Based on such understanding, technical scheme is the most in other words
The part contributing prior art or the part of this technical scheme can embody with the form of software product, this meter
Calculation machine software product is stored in a storage medium, including some instructions with so that a computer equipment (can be individual
People's computer, server, or the network equipment etc.) perform all or part of step of method described in each embodiment of the present invention.
And aforesaid storage medium includes: USB flash disk, portable hard drive, ROM, RAM, magnetic disc or CD etc. are various can store program code
Medium.
The above, the only detailed description of the invention of the present invention, but protection scope of the present invention is not limited thereto, and any
Those familiar with the art, in the technical scope that the invention discloses, can readily occur in change or replace, should contain
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with scope of the claims.
Claims (12)
1. a mobile terminal, it is characterised in that including:
Signal output apparatus, controller and tunable filtering circuit；Wherein,
Described signal output apparatus, is used for exporting cyclical signal；
Described controller includes:
Interference band determines module, for when described cyclical signal being detected, determines that described cyclical signal is to described shifting
The interference band that communications band residing for dynamic terminal interferes；
Trap signal output module, for according to described interference band output filtering signal；
Described tunable filtering circuit, for filtering in described cyclical signal according to described trap signal, is in described interference
The harmonic component of frequency range.
Mobile terminal the most according to claim 1, it is characterised in that also include:
Signal buffer, for carrying out Shape correction to described cyclical signal.
Mobile terminal the most according to claim 1, it is characterised in that also include:
Block isolating device, for filtering described tunable filtering circuit and/or the direct current signal of described controller generation.
Mobile terminal the most according to claim 1, it is characterised in that also include connecting valve；
Described controller also includes:
Connecting signal output module, for when determining that described cyclical signal disturbs described communications band, output connects signal；
Described connecting valve, for connecting described signal output apparatus and described tunable filtering electricity according to described connection signal
Road.
Mobile terminal the most according to claim 1, it is characterised in that also include connecting valve；
Described controller also includes:
Cut-off signal output module, for determining that described cyclical signal does not interferes with communications band residing for described mobile terminal
Time, export cut-off signal；
Described connecting valve, for disconnecting described signal output apparatus and described tunable filtering circuit according to described cut-off signal
Connection.
6. according to the mobile terminal according to any one of claim 1-5, it is characterised in that described tunable filtering circuit includes
At least one trap circuit；Described trap circuit includes an electric capacity and an inductance of series connection；
Described trap signal output module includes:
Parameter value calculation submodule, for calculating capacitance and inductance value according to described interference band；
Parameter value generates submodule, is used for using described capacitance to generate trap signal with described inductance value；
Described tunable filtering circuit is additionally operable to:
Described electric capacity adjusted to described capacitance, described inductance adjusted to described inductance value, so that described trap circuit exists
The impedance of described interference band is less than the impedance threshold preset.
7. the harmonic suppressing method of a cyclical signal, it is characterised in that apply in the terminal, described mobile terminal bag
The method described in signal output apparatus, controller and tunable filtering circuit that includes includes:
Described signal output apparatus output cyclical signal；
Described controller, when described cyclical signal being detected, determines that described cyclical signal is to logical residing for described mobile terminal
The interference band that letter frequency range interferes, according to described interference band output filtering signal；
Described tunable filtering circuit filters in described cyclical signal according to described trap signal, is in described interference band
Harmonic component.
Method the most according to claim 7, it is characterised in that described mobile terminal also includes signal buffer, described side
Method also includes:
Described signal buffer carries out Shape correction to described cyclical signal.
Method the most according to claim 7, it is characterised in that described mobile terminal also includes block isolating device, and described method is also
Including:
Described block isolating device filters described tunable filtering circuit and/or the direct current signal of described controller generation.
Method the most according to claim 7, it is characterised in that described mobile terminal also includes connecting valve, described method
Also include:
Described controller is when determining that described cyclical signal disturbs described communications band, and output connects signal；
Described connecting valve connects described signal output apparatus and described tunable filtering circuit according to described connection signal.
11. methods according to claim 7, it is characterised in that described mobile terminal also includes connecting valve, described method
Also include:
Described controller is when determining that described cyclical signal does not interferes with communications band residing for described mobile terminal, and output disconnects letter
Number；
Described connecting valve disconnects the company of described signal output apparatus and described tunable filtering circuit according to described cut-off signal
Connect.
12. according to the method described in any one of claim 7-11, it is characterised in that described tunable filtering circuit includes at least
One trap circuit；Described trap circuit includes an electric capacity and an inductance of series connection；
The described step according to described interference band output filtering signal includes:
Capacitance and inductance value is calculated according to described interference band；
Described capacitance is used to generate trap signal with described inductance value；
Described according in the described trap signal described cyclical signal of filtration, it is in the step of the harmonic component of described interference band
Including:
Described electric capacity adjusted to described capacitance, described inductance adjusted to described inductance value, so that described trap circuit exists
The impedance of described interference band is less than the impedance threshold preset.
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| CN201610615068.XA CN106160760B (en) | 2016-07-29 | 2016-07-29 | A kind of harmonic suppressing method and mobile terminal of cyclical signal |
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| CN201610615068.XA CN106160760B (en) | 2016-07-29 | 2016-07-29 | A kind of harmonic suppressing method and mobile terminal of cyclical signal |
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