CN106160760B - A kind of harmonic suppressing method and mobile terminal of cyclical signal - Google Patents
A kind of harmonic suppressing method and mobile terminal of cyclical signal Download PDFInfo
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- CN106160760B CN106160760B CN201610615068.XA CN201610615068A CN106160760B CN 106160760 B CN106160760 B CN 106160760B CN 201610615068 A CN201610615068 A CN 201610615068A CN 106160760 B CN106160760 B CN 106160760B
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- cyclical
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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
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- 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
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Noise Elimination (AREA)
Abstract
The embodiment of the invention provides a kind of harmonic suppressing method of cyclical signal and mobile terminal, which includes: signal output apparatus, controller and tunable filtering circuit；Wherein, the signal output apparatus, for exporting cyclical signal；The controller includes: interference band determining module, the interference band interfered for when detecting the cyclical signal, determining the cyclical signal to communications band locating for the mobile terminal；Trap signal output module, for exporting trap signal according to the interference band；The tunable filtering circuit, for being filtered in the cyclical signal according to the trap signal, the harmonic component in the interference band.The embodiment of the present invention improves radio frequency interference, again minimum radius influence signal edge to greatest extent, improves the quality for improving radio frequency interference, meanwhile, it avoids adjusting frequency, avoids the duty ratio of adjustment signal, substantially increase the practicability for improving radio frequency interference.
Description
Technical field
The present invention relates to the harmonic suppressing methods and a kind of movement of field of communication technology more particularly to a kind of cyclical signal
Terminal.
Background technique
With the development of mobile communication technology, mobile terminal has become a part indispensable in people's life, real
Accessible call whenever and wherever possible, also, many common functions that mobile terminal is included are showed, have been brought just to people's life
Benefit.
In the terminal, MIPI (Mobile Industry Processor Interface, mobile Industry Processor
Interface) or the signal frequency multiplications such as clock easily cause radio frequency interference, cause communication quality to decline.
Currently, usual 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 generate the effect of high-frequency signal shorted to earth, filter out higher harmonic components in the signal based on this, reach
To the purpose for improving interference.
But harmonic attenuation amplitude hour, the improvement for interference are unobvious sometimes；When harmonic attenuation amplitude is big, due to
Signal rising edge is required to be increasingly stringenter (such as rising edge/failing edge requires to be less than some value), filters out higher harmonic components
Mode will affect signal edge signal rise/fall time, so that the quality (edge timing) of signal is unsatisfactory for requiring, improvement is penetrated
Frequency interferes second-rate.
Further, it is also possible to improve radio frequency interference intensity by modes such as frequency hopping (adjusting Frequency point), adjusting duty ratio etc..
But this mode limits larger, the practicability is poor, cannot use in certain scenes, for example, the clock of camera is believed
Number require duty ratio 50% ± 10%, duty ratio is unadjustable at this time.
Summary of the invention
The embodiment of the present invention provides the harmonic suppressing method and mobile terminal of a kind of cyclical signal, with solve connection inductance or
Magnetic bead, shunt capacitance improve the second-rate of radio frequency interference, and the modes such as frequency hopping, adjusting duty ratio improve the practicability of radio frequency interference
The problem of difference.
In a first aspect, providing a kind of mobile terminal, comprising:
Signal output apparatus, controller and tunable filtering circuit；Wherein,
The signal output apparatus, for exporting cyclical signal；
The controller includes:
Interference band determining module, for when detecting the cyclical signal, determining the cyclical signal to institute
State the interference band that communications band locating for mobile terminal interferes；
Trap signal output module, for exporting trap signal according to the interference band；
The tunable filtering circuit, for being filtered in the cyclical signal according to the trap signal, in described
The harmonic component of interference band.
Second aspect provides a kind of harmonic suppressing method of cyclical signal, using in the terminal, the movement
Terminal include signal output apparatus, controller and tunable filtering circuit the described method includes:
The signal output apparatus exports cyclical signal；
The controller determines the cyclical signal to the mobile terminal institute when detecting the cyclical signal
The interference band that place's communications band interferes exports trap signal according to the interference band；
The tunable filtering circuit filters in the cyclical signal according to the trap signal, in the interference frequency
The harmonic component of section.
In this way, in the embodiment of the present invention, when signal output apparatus exports cyclical signal, if it is determined that cyclical signal
Interfere communications band locating for the mobile terminal, then it can be by tunable filtering circuit property filter cycle signal, being in dry
The harmonic component for scrambling section, it is smaller along influencing on the up and down of signal, by by the neighbouring harmonic component of cyclical signal
It filters out, improves radio frequency interference, again minimum radius influence signal edge to greatest extent, improve the quality for improving radio frequency interference, together
When, it avoids adjusting frequency, avoids the duty ratio of adjustment signal, be still applicable in, substantially increase in certain restricted scenes
Improve the practicability of radio frequency interference.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below by institute in the description to the embodiment of the present invention
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without any creative labor, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is a kind of structural block diagram of mobile terminal of the invention；
Fig. 2 is a kind of structural schematic diagram of tunable filtering circuit of the embodiment of the present invention；
Fig. 3 is a kind of block diagram of trap signal output module of the embodiment of the present invention；
Fig. 4 A and Fig. 4 B are a kind of filtering exemplary diagrams of trap circuit of the embodiment of the present invention；
Fig. 5 is the structural block diagram of another mobile terminal of the invention；
Fig. 6 is a kind of exemplary diagram of the Shape correction of signal buffer of the embodiment of the present invention；
Fig. 7 is a kind of step flow chart of the harmonic suppressing method embodiment of cyclical signal of the invention；
Fig. 8 is the step flow chart of the harmonic suppressing method embodiment of another cyclical signal of the invention；
Fig. 9 is the block diagram of the mobile terminal of another embodiment of the present invention；
Figure 10 is the structural schematic diagram of the mobile terminal of another embodiment of the invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are some of the embodiments of the present invention, instead of all the embodiments.Based on this hair
Embodiment in bright, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, shall fall within the protection scope of the present invention.
Embodiment one
Referring to Fig.1, a kind of structural block diagram of mobile terminal of the invention is shown.
In the concrete realization, which may include mobile phone, tablet computer, personal digital assistant, wearable device
(such as glasses, wrist-watch) etc..
The operating system of these mobile terminals 100 may include Android (Android), IOS, Windows Phone,
Windows etc., the embodiments of the present invention are not limited thereto.
It in embodiments of the present invention, in the mobile terminal 100 may include signal output apparatus 110, controller 120 and can
Tunable filter circuit 130.
Signal output apparatus 110, for exporting cyclical signal.
For example, signal output apparatus 110 may include MIPI generator or clock generator etc., i.e., cyclical signal can
To include MIPI signal, clock signal etc..
In the concrete realization, the signal output apparatus 110 may be mounted at CPU (Central Processing Unit,
Central processing unit), liquid crystal display die set, camera module, transceiver Transceiver, power amplifier PA, hilted broadsword more throw out
In the components such as pass.
Controller 120 is responsible for the control of harmonics restraint, and in embodiments of the present invention, controller 120 may include such as lower die
Block:
Interference band determining module 121, for when detecting cyclical signal, determining cyclical signal to the movement
The interference band that communications band locating for terminal interferes.
Trap signal output module 122, for exporting trap signal according to interference band.
In practical applications, it in some memory of mobile terminal 100, has recorded signal output apparatus 110 and is generating
The interference band of interference.
When signal output apparatus 110 exports cyclical signal, controller 120 can be inquired mobile whole by radio-frequency module
The locating communications band in end.
If the interference band that the communications band is stored with memory, signal output apparatus 110 generates interference matches,
It can determine communications band locating for cyclical signal interfering mobile terminal.
When determining communications band locating for cyclical signal interfering mobile terminal 100, filtering letter is can be generated in controller 120
Number, and the trap signal is sent to tunable filtering circuit 130.
Tunable filtering circuit 130 is used in foundation property trap signal filter cycle signal 130, in interference band
Harmonic component.
In practical applications, cyclical signal can resolve into large number of sine wave after Fourier transformation,
The low sinusoidal amplitude of middle frequency is larger, and the high sinusoidal amplitude of frequency is smaller.
Tunable filtering circuit 130 can be resonance circuit, need the frequency (i.e. interference band) that filters nearby and have compared with
Strong filter effect, it is smaller along influencing on the up and down of signal, by the way that the neighbouring harmonic component of cyclical signal is filtered
It removes, improves radio frequency interference, again minimum radius influence signal edge to greatest extent.
In an alternate embodiment of the present invention where, as shown in Fig. 2, tunable filtering circuit 130 may include at least one
A 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 210 can be directed to different communication
Frequency range is filtered.
In practical applications, trap circuit 210 may include a concatenated capacitor 211 and an inductance 212.
In an alternative embodiment of the invention, with reference to the block diagram of trap signal output module shown in Fig. 3, filtering letter
Number output module 122 can further include following submodule:
Parameter value calculation submodule 1221, for calculating capacitance and inductance value according to interference band；
Parameter value generates submodule 1222, for generating trap signal using capacitance and the inductance value.
In contrast, tunable filtering circuit 130 can be also used for:
Capacitor 211 is adjusted and is adjusted to capacitance, by inductance 212 to inductance value, so that trap circuit 210 is in interference frequency
The impedance of section is less than preset impedance threshold.
In embodiments of the present invention, capacitor 211 is connected with inductance 212 can form trap circuit 210, trap circuit 210
Impedance codetermined by capacitor 211 and inductance 212, referring specifically to following formula:
Wherein, ZsFor impedance, L is inductance, and C is capacitor.
As ω L and 1/ ω C equal, the impedance of trap circuit 210 is equal to 0, and impedance at this time is minimum.
At this point,
Wherein, f is frequency, by adjusting inductance value, the capacitance of capacitor C of inductance L, trap circuit 210 can be made to exist
Under specific frequency f, impedance 0 or very little, and in other frequencies, impedance is not 0, or very big.
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 impedance adjustment is ideally 0 at specific frequency f by trap circuit 210, still,
In practical applications, trap circuit 210 is at specific frequency f, and usually more difficult by impedance adjustment most 0, therefore, impedance is smaller
(showing as being less than preset impedance threshold) is also receiving in range.
In one example, as shown in Figure 4 A, the capacitance of capacitor 211 is 1.9pF, and the inductance value of inductance 212 is
15nH, at point m2, frequency freq=21.00MHz, dB (SP1.SP.S (1,2))=- 0.000, at point m1, frequency freq
=921.0MHz, dB (SP1.SP.S (1,2))=- 17.104.
It in this example, can be according to capacitor if cyclical signal produces interference at 921.0MHz (noise spot)
Value 1.9pF adjusts capacitor 211, adjusts inductance 212 according to inductance value 15nH, can produce preferable filtering effect in 921.0MHz
Fruit plays the role of reducing interference.
In another example, as shown in Figure 4 B, the capacitance of capacitor 211 is 1.8pF, and the inductance value of inductance 212 is
15nH, at point m2, freq=21.00MHz, dB (SP1.SP.S (1,2))=- 0.000, at point m1, freq=
941.0MHz, dB (SP1.SP.S (1,2))=- 19.813.
It in this example, can be according to capacitor if cyclical signal produces interference at 941.0MHz (noise spot)
Value 1.8pF adjusts capacitor 211, adjusts inductance 212 according to inductance value 15nH, can produce preferable filtering effect in 941.0MHz
Fruit plays the role of reducing interference.
In this way, in the embodiment of the present invention, when signal output apparatus exports cyclical signal, if it is determined that cyclical signal
Interfere communications band locating for the mobile terminal, then it can be by tunable filtering circuit property filter cycle signal, being in dry
The harmonic component for scrambling section, it is smaller along influencing on the up and down of signal, by by the neighbouring harmonic component of cyclical signal
It filters out, improves radio frequency interference, again minimum radius influence signal edge to greatest extent, improve the quality for improving radio frequency interference, together
When, it avoids adjusting frequency, avoids the duty ratio of adjustment signal, be still applicable in, substantially increase in certain restricted scenes
Improve the practicability of radio frequency interference.
Embodiment two
Referring to Fig. 5, the structural block diagram of another mobile terminal of the invention is shown.
In the concrete realization, which includes signal output apparatus 510, signal buffer 520, controller
530, connection switch 540, tunable filtering circuit 550, block isolating device 560.
Signal output apparatus 510, for exporting cyclical signal.
Signal buffer 520, also known as Buffer can connect with signal output apparatus 510, for cyclical signal into
Row Shape correction.
In embodiments of the present invention, as shown in fig. 6, (such as cyclical signal) rising edge of signal 610 before Shape correction with
Failing edge is slower, (such as cyclical signal) rising edge of signal 620 and failing edge steeper of meeting after Shape correction.
In embodiments of the present invention, controller 530 may include following module:
Interference band determining module 531, for when detecting cyclical signal, determining cyclical signal to mobile terminal
The interference band that communications band locating for 500 interferes.
Trap signal output module 532, for exporting trap signal according to interference band.
Connection signal output module 533, for when determining that the cyclical signal interferes the communications band, output to connect
Connect signal.
Cut-off signal output module 534, for determining that cyclical signal do not interfere with communications band locating for mobile terminal 500
When, export cut-off signal.
In practical applications, it in some memory of mobile terminal 500, has recorded signal output apparatus 510 and is generating
The interference band of interference.
For components such as certain screens, camera modules, possible comparison is accurate, the harmonic wave very little that itself is generated,
Interference may not be generated to communications band locating for mobile terminal 500, or interference is very weak, then, filtering can not be started at this time.
If components such as certain screens, camera modules, possible comparison is coarse, and the harmonic wave itself generated is larger,
Interference may be generated to communication frequency locating for mobile terminal 500, then, it can star filtering at this time.
When signal output apparatus 510 exports cyclical signal, controller 530 can be inquired mobile whole by radio-frequency module
Communications band locating for end 500.
If the interference band that the communications band is stored with memory, signal output apparatus 510 generates interference matches,
Communications band locating for cyclical signal interfering mobile terminal 500 can be determined, conversely, can then determine that cyclical signal is not done
Disturb communications band locating for mobile terminal 500.
When determining communication frequency locating for cyclical signal interfering mobile terminal 500, connection letter is can be generated in controller 530
Number, and, connection signal is sent to connection switch 540, with connection signal output circuit 510 and tunable filtering circuit 550.
When determining that cyclical signal does not interfere with communication frequency locating for mobile terminal 500, disconnection is can be generated in controller 530
Connection signal, and, cut-off signal is sent to connection switch 540, with cut-off signal output circuit 510 and tunable filtering circuit
550 connection.
Connection switch 540 can connect with tunable filtering circuit 550, be used for:
According to according to connection signal connection signal output circuit 510 and tunable filtering circuit 550.
According to the connection of cut-off signal cut-off signal output circuit 510 and tunable filtering circuit 550, disappearing for resource is reduced
Consumption.
Tunable filtering circuit 550 is used in foundation property trap signal filter cycle signal, the harmonic wave in interference band
Component.
In embodiments of the present invention, if cyclical signal passes through Shape correction, tunable filtering circuit 550 can be with
In cyclical signal after foundation trap signal filtering Shape correction, the harmonic component in interference band.
Block isolating device 560 can connect with tunable filtering circuit 550, for filter tunable filtering circuit 550 and/or
The direct current signal that controller 530 generates.
In embodiments of the present invention, block isolating device 560 can hinder direct current by exchange (high fdrequency component), prevent tunable filter
Wave circuit 550 and/or the issuable direct current signal of controller 510 have an impact cyclical signal.
Embodiment three
Referring to Fig. 7, a kind of step flow chart of the harmonic suppressing method embodiment of cyclical signal of the invention is shown,
Can be using in the terminal, mobile terminal includes signal output apparatus, controller and tunable filtering circuit, specifically can be with
Include the following steps:
Step 701, the signal output apparatus exports cyclical signal.
Step 702, the controller determines the cyclical signal to the shifting when detecting the cyclical signal
The interference band that communications band locating for dynamic terminal interferes.
Step 703, trap signal is exported according to the interference band.
Step 704, the tunable filtering circuit filters in the cyclical signal according to the trap signal, is in institute
State the harmonic component of interference band.
In the concrete realization, the tunable filtering circuit includes at least one trap circuit；The trap circuit includes
A concatenated capacitor and an inductance；
Controller can calculate capacitance and inductance value according to the interference band when exporting trap signal；Using institute
It states capacitance and the inductance value generates trap signal.
The capacitor can be adjusted and be adjusted to the capacitance, by the inductance in filtering by tunable filtering circuit
To the inductance value, so that the trap circuit is less than preset impedance threshold in the impedance of the interference band.
In embodiments of the present invention, due to substantially similar to the application of embodiment one, so be described relatively simple, it is related
Place illustrates that the embodiment of the present invention is not described in detail herein referring to the part of embodiment one.
In this way, in the embodiment of the present invention, when signal output apparatus exports cyclical signal, if it is determined that cyclical signal
Interfere communications band locating for the mobile terminal, then it can be by tunable filtering circuit property filter cycle signal, being in dry
The harmonic component for scrambling section, it is smaller along influencing on the up and down of signal, by by the neighbouring harmonic component of cyclical signal
It filters out, improves radio frequency interference, again minimum radius influence signal edge to greatest extent, improve the quality for improving radio frequency interference, together
When, it avoids adjusting frequency, avoids the duty ratio of adjustment signal, be still applicable in, substantially increase in certain restricted scenes
Improve the practicability of radio frequency interference.
Example IV
Referring to Fig. 8, the step process of the harmonic suppressing method embodiment of another cyclical signal of the invention is shown
Figure, can using in the terminal, mobile terminal include signal output apparatus, signal buffer, controller, connection switch,
Tunable filtering circuit and block isolating device, can specifically include following steps:
Step 801, the signal output apparatus exports cyclical signal.
Step 802, the signal buffer carries out Shape correction to the cyclical signal.
Step 803, the controller is when determining that the cyclical signal interferes the communications band, output connection letter
Number.
Step 804, the connection switch according to the connection signal connect the signal output apparatus with it is described tunable
Filter circuit.
Step 805, the controller determines the cyclical signal to the shifting when detecting the cyclical signal
The interference band that communications band locating for dynamic terminal interferes.
Step 806, trap signal is exported according to the interference band.
Step 807, the tunable filtering circuit filters in the cyclical signal according to the trap signal, is in institute
State the harmonic component of interference band.
Step 808, the block isolating device filters the direct current letter that the tunable filtering circuit and/or the controller generate
Number.
Step 809, the controller is determining that the cyclical signal do not interfere with communications band locating for the mobile terminal
When, export cut-off signal.
Step 810, the connection switch according to the cut-off signal disconnect the signal output apparatus with it is described tunable
The connection of filter circuit.
In embodiments of the present invention, due to substantially similar to the application of embodiment two, so be described relatively simple, it is related
Place illustrates that the embodiment of the present invention is not described in detail herein referring to the part of embodiment two.
It should be noted that for simple description, therefore, it is stated as a series of action groups for embodiment of the method
It closes, but those skilled in the art should understand that, embodiment of that present invention are not limited by the describe sequence of actions, because according to
According to the embodiment of the present invention, some steps may be performed in other sequences or simultaneously.Secondly, those skilled in the art also should
Know, the embodiments described in the specification are all preferred embodiments, and the related movement not necessarily present invention is implemented
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 include: to
A processor 901, memory 902, at least one network interface 904, other users interface 903 and cyclical signal is humorous less
Wave suppression circuit 906.Various components in mobile terminal 900 are coupled by bus system 905.It is understood that total linear system
System 905 is for realizing the connection communication between these components.Bus system 905 further includes power supply in addition to including data/address bus
Bus, control bus and status signal bus in addition.But for the sake of clear explanation, various buses are all designated as bus in Fig. 9
System 905.
Wherein, user interface 903 may include display, keyboard or pointing device (for example, mouse, trace ball
(trackball), touch-sensitive plate or touch screen etc..
It is appreciated that the memory 902 in the embodiment of the present invention can be volatile memory or nonvolatile memory,
It or may include both volatile and non-volatile memories.Wherein, nonvolatile memory can be read-only memory (Read-
OnlyMemory, ROM), programmable read only memory (ProgrammableROM, PROM), the read-only storage of erasable programmable
Device (ErasablePROM, EPROM), electrically erasable programmable read-only memory (ElectricallyEPROM, EEPROM) or
Flash memory.Volatile memory can be random access memory (RandomAccessMemory, RAM), be used as external high speed
Caching.By exemplary but be not restricted explanation, the RAM of many forms is available, such as static random access memory
(StaticRAM, SRAM), dynamic random access memory (DynamicRAM, DRAM), Synchronous Dynamic Random Access Memory
(SynchronousDRAM, SDRAM), double data speed synchronous dynamic RAM (DoubleDataRate
SDRAM, DDRSDRAM), enhanced Synchronous Dynamic Random Access Memory (Enhanced SDRAM, ESDRAM), synchronous connect
Connect dynamic random access memory (SynchlinkDRAM, SLDRAM) and direct rambus random access memory
(DirectRambusRAM, DRRAM).The memory 902 of the system and method for description of the embodiment of the present invention is intended to include but unlimited
In the memory of these and any other suitable type.
In some embodiments, memory 902 stores following element, executable modules or data structures, or
Their subset of person or their superset: operating system 9021 and application program 9022.
Wherein, operating system 9021 include various system programs, such as ccf layer, core library layer, driving layer etc., are used for
Realize various basic businesses and the hardware based task of processing.Application program 9022 includes various application programs, such as media
Player (MediaPlayer), browser (Browser) etc., 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, for exporting cyclical signal；
Tunable filtering circuit is in interference band for filtering in the cyclical signal according to the trap signal
Harmonic component.
In embodiments of the present invention, by the program or instruction of calling memory 902 to store, specifically, can be application
The program or instruction stored in program 9022, processor 901 are used for when detecting the cyclical signal, determine the period
The interference band that property signal interferes communications band locating for the mobile terminal；Filtering letter is exported according to the interference band
Number.
The method that the embodiments of the present invention disclose can be applied in processor 901, or be realized by processor 901.
Processor 901 may be a kind of IC chip, the processing capacity with signal.During realization, the above method it is each
Step can be completed by the integrated logic circuit of the hardware in processor 901 or the instruction of software form.Above-mentioned processing
Device 901 can be general processor, digital signal processor (DigitalSignalProcessor, DSP), specific integrated circuit
(ApplicationSpecific IntegratedCircuit, ASIC), ready-made programmable gate array
(FieldProgrammableGateArray, FPGA) either other programmable logic device, discrete gate or transistor logic
Device, discrete hardware components.It may be implemented or execute disclosed each method, step and the logical box in the embodiment of the present invention
Figure.General processor can be microprocessor or the processor is also possible to any conventional processor etc..In conjunction with the present invention
The step of method disclosed in embodiment, can be embodied directly in hardware decoding processor and execute completion, or use decoding processor
In hardware and software module combination execute completion.Software module can be located at random access memory, and flash memory, read-only memory can
In the storage medium of this fields such as program read-only memory or electrically erasable programmable memory, register maturation.The storage
Medium is located at memory 902, and processor 901 reads the information in memory 902, and the step of the above method is completed in conjunction with its hardware
Suddenly.
It is understood that the embodiment of the present invention description these embodiments can with hardware, software, firmware, middleware,
Microcode or combinations thereof is realized.For hardware realization, processing unit be may be implemented at least one specific integrated circuit (Appli
CationSpecificIntegratedCircuits, ASIC), digital signal processor
(DigitalSignalProcessing, DSP), digital signal processing appts (DSPDevice, DSPD), programmable logic are set
Standby (ProgrammableLogicDevice, PLD), field programmable gate array (Field-ProgrammableGateArray,
FPGA), general processor, controller, microcontroller, microprocessor, other electronics lists for executing herein described function
In member or combinations thereof.
For software implementations, can by execute the embodiment of the present invention described in function module (such as process, function etc.) come
Realize technology described in the embodiment of the present invention.Software code is storable in memory and is executed by processor.Memory can
With portion realizes in the processor or outside the processor.
Optionally, the harmonic suppression circuit 906 of cyclical signal further include:
Signal buffer, for carrying out Shape correction to the cyclical signal.
Optionally, the harmonic suppression circuit 906 of cyclical signal further include:
Block isolating device, the direct current signal generated for filtering the tunable filtering circuit and/or the controller.
Optionally, the filtering circuit 906 of cyclical signal further includes connection switch；
Processor 901 is also used to:
When determining that the cyclical signal interferes the communications band, connection signal is exported；
Connection switch, for connecting the signal output apparatus and tunable filtering electricity according to the connection signal
Road.
Optionally, the filtering circuit 906 of cyclical signal further includes connection switch；
Processor 901 is also used to:
When determining that the cyclical signal does not interfere with communications band locating for the mobile terminal, cut-off signal is exported；
Connection switch, for disconnecting the signal output apparatus and the tunable filtering circuit according to the cut-off signal
Connection.
Optionally, the tunable filtering circuit includes at least one trap circuit；The trap circuit includes concatenated
One capacitor and an inductance；
Processor 901 is also used to:
Capacitance and inductance value are calculated according to the interference band；
Trap signal is generated using the capacitance and the inductance value；
The tunable filtering circuit is also used to:
The capacitor is adjusted and is adjusted to the capacitance, by the inductance to the inductance value, so that the trap is electric
Road is less than preset impedance threshold in the impedance of the interference band.
Mobile terminal 900 can be realized each process that mobile terminal is realized in previous embodiment, to avoid repeating, here
It repeats no more.
In this way, in the embodiment of the present invention, when signal output apparatus exports cyclical signal, if it is determined that cyclical signal
Interfere communications band locating for the mobile terminal, then it can be by tunable filtering circuit property filter cycle signal, being in dry
The harmonic component for scrambling section, it is smaller along influencing on the up and down of signal, by by the neighbouring harmonic component of cyclical signal
It filters out, improves radio frequency interference, again minimum radius influence signal edge to greatest extent, improve the quality for improving radio frequency interference, together
When, it avoids adjusting frequency, avoids the duty ratio of adjustment signal, be still applicable in, substantially increase in certain restricted scenes
Improve the practicability of radio frequency interference.
Embodiment nine
Figure 10 is the structural schematic diagram of the mobile terminal of another embodiment of the present invention.Specifically, the mobile end in Figure 10
End 1000 can be mobile phone, tablet 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, memory 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 unit 1030 can be used for receiving the number or character information of user's input, and generate with movement eventually
The related signal input of the user setting and function control at end 1000.Specifically, in the embodiment of the present invention, the input unit
1030 may include touch panel 1031.Touch panel 1031, also referred to as touch screen collect the touching of user on it or nearby
It touches operation (for example user uses the operations of any suitable object or attachment on touch panel 1031 such as finger, stylus), and
Corresponding attachment device is driven according to preset formula.Optionally, touch panel 1031 may include touch detecting apparatus and
Two parts of touch controller.Wherein, the touch orientation of touch detecting apparatus detection user, and detect touch operation bring letter
Number, transmit a signal to touch controller；Touch controller receives touch information from touch detecting apparatus, and is converted into
Contact coordinate, then give the processor 1060, and order that processor 1060 is sent can be received and executed.Furthermore, it is possible to
Touch panel 1031 is realized using multiple types such as resistance-type, condenser type, infrared ray and surface acoustic waves.In addition to touch panel
1031, input unit 1030 can also include other input equipments 1032, other input equipments 1032 can include but is not limited to
One of physical keyboard, function key (such as volume control button, switch key etc.), trace ball, mouse, operating stick etc. are more
Kind.
Wherein, display unit 1040 can be used for showing information input by user or be supplied to the information and movement of user
The various menu interfaces of terminal 1000.Display unit 1040 may include display panel 1041, optionally, using LCD or can have
The forms such as machine light emitting diode (OrganicLight-EmittingDiode, OLED) configure display panel 1041.
It should be noted that touch panel 1031 can cover display panel 1041, touch display screen is formed, when the touch display screen
After detecting touch operation on it or nearby, processor 1060 is sent to determine the type of touch event, is followed by subsequent processing
Device 1060 provides corresponding visual output according to the type of touch event in touch display screen.
Touch display screen includes Application Program Interface viewing area and common control viewing area.The Application Program Interface viewing area
And arrangement mode of the common control viewing area does not limit, can be arranged above and below, left-right situs etc. can distinguish two it is aobvious
Show the arrangement mode in area.The Application Program Interface viewing area is displayed for the interface of application program.Each interface can be with
The interface elements such as the icon comprising at least one application program and/or widget desktop control.The Application Program Interface viewing area
Or the empty interface not comprising any content.This commonly uses control viewing area for showing the higher control of utilization rate, for example,
Application icons such as button, interface number, scroll bar, phone directory icon etc. are set.
Wherein processor 1060 is the control centre of mobile terminal 1000, utilizes various interfaces and connection whole mobile phone
Various pieces, by running or execute the software program and/or module that are stored in first memory 1021, and call and deposit
The data in second memory 1022 are stored up, the various functions and processing data of mobile terminal 1000 are executed, thus eventually to movement
End 1000 carries out integral monitoring.Optionally, processor 1060 may include at least one processing unit.
In embodiments of the present invention, the filtering circuit 1011 of cyclical signal includes:
Signal output apparatus, for exporting cyclical signal；
Tunable filtering circuit is in interference band for filtering in the cyclical signal according to the trap signal
Harmonic component.
In embodiments of the present invention, by calling the software program and/or module that store in the first memory 1021
And/or the data in the second memory 1022, processor 1060 are used for when detecting the cyclical signal, described in determination
The interference band that cyclical signal interferes communications band locating for the mobile terminal；It was exported according to the interference band
Filter signal.
Optionally, the harmonic suppression circuit 1011 of cyclical signal further include:
Signal buffer, for carrying out Shape correction to the cyclical signal.
Optionally, the harmonic suppression circuit 1011 of cyclical signal further include:
Block isolating device, the direct current signal generated for filtering the tunable filtering circuit and/or the controller.
Optionally, the filtering circuit 1011 of cyclical signal further includes connection switch；
Processor 1060 is also used to:
When determining that the cyclical signal interferes the communications band, connection signal is exported；
Connection switch, for connecting the signal output apparatus and tunable filtering electricity according to the connection signal
Road.
Optionally, the filtering circuit 1011 of cyclical signal further includes connection switch；
Processor 1060 is also used to:
When determining that the cyclical signal does not interfere with communications band locating for the mobile terminal, cut-off signal is exported；
Connection switch, for disconnecting the signal output apparatus and the tunable filtering circuit according to the cut-off signal
Connection.
Optionally, the tunable filtering circuit includes at least one trap circuit；The trap circuit includes concatenated
One capacitor and an inductance；
Processor 1060 is also used to:
Capacitance and inductance value are calculated according to the interference band；
Trap signal is generated using the capacitance and the inductance value；
The tunable filtering circuit is also used to:
The capacitor is adjusted and is adjusted to the capacitance, by the inductance to the inductance value, so that the trap is electric
Road is less than preset impedance threshold in the impedance of the interference band.
As it can be seen that in this way, in the embodiment of the present invention, when signal output apparatus exports cyclical signal, if it is determined that the period
Communications band locating for mobile terminal described in property signal interference, then can by tunable filtering circuit property filter cycle signal,
Harmonic component in interference band, it is smaller along influencing on the up and down of signal, by by the neighbouring humorous of cyclical signal
Wave component filters out, and improves radio frequency interference, again minimum radius influence signal edge to greatest extent, improves the matter for improving radio frequency interference
Amount, meanwhile, it avoids adjusting frequency, avoids the duty ratio of adjustment signal, be still applicable in certain restricted scenes, mention significantly
The high practicability for improving radio frequency interference.
Those of ordinary skill in the art may be aware that the embodiment in conjunction with disclosed in the embodiment of the present invention describe it is each
Exemplary unit and algorithm steps can be realized with the combination of electronic hardware or computer software and electronic hardware.These
Function is implemented in hardware or software actually, the specific application and design constraint depending on technical solution.Profession
Technical staff can use different methods to achieve the described function each specific application, but this realization is not answered
Think beyond the scope of this invention.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description,
The specific work process of device and unit, can refer to corresponding processes in the foregoing method embodiment, and details are not described herein.
In embodiment provided herein, it should be understood that disclosed device and method can pass through others
Mode is realized.For example, the apparatus embodiments described above are merely exemplary, for example, the division of the unit, only
A kind of logical function partition, there may be another division manner in actual implementation, for example, multiple units or components can combine or
Person is desirably integrated into another system, or some features can be ignored or not executed.Another point, shown or discussed is mutual
Between coupling, direct-coupling or communication connection can be through some interfaces, the INDIRECT COUPLING or communication link of device or unit
It connects, can be electrical property, mechanical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
In network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme
's.
It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unit
It is that each unit physically exists alone, can also be integrated in one unit with two or more units.
It, can be with if the function is realized in the form of SFU software functional unit and when sold or used as an independent product
It is stored in a computer readable storage medium.Based on this understanding, technical solution of the present invention is substantially in other words
The part of the part that contributes to existing technology or the technical solution can be embodied in the form of software products, the meter
Calculation machine software product is stored in a storage medium, including some instructions are used so that a computer equipment (can be a
People's computer, server or network equipment etc.) it performs all or part of the steps of the method described in the various embodiments of the present invention.
And storage medium above-mentioned includes: that USB flash disk, mobile hard disk, ROM, RAM, magnetic or disk etc. are various can store program code
Medium.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be subject to the protection scope in claims.
Claims (8)
1. a kind of mobile terminal characterized by comprising
Signal output apparatus, controller, connection switch and tunable filtering circuit；Wherein,
The signal output apparatus, for exporting cyclical signal；
The controller includes: interference band determining module, for when detecting the cyclical signal, determining the period
The interference band that property signal interferes communications band locating for the mobile terminal；
Trap signal output module, for exporting trap signal according to the interference band；
Connection signal output module, for exporting connection signal when determining that the cyclical signal interferes the communications band；
Connection switch, for connecting the signal output apparatus and the tunable filtering circuit according to the connection signal；
The tunable filtering circuit is in the interference for filtering in the cyclical signal according to the trap signal
The harmonic component of frequency range；
Block isolating device, for hindering direct current by exchange, filter the tunable filtering circuit and/or the controller generate it is straight
Flow signal.
2. mobile terminal according to claim 1, which is characterized in that further include:
Signal buffer, for carrying out Shape correction to the cyclical signal.
3. mobile terminal according to claim 1, which is characterized in that further include connection switch；
The controller further include:
Cut-off signal output module, for determining that the cyclical signal do not interfere with communications band locating for the mobile terminal
When, export cut-off signal；
The connection switch, for disconnecting the signal output apparatus and the tunable filtering circuit according to the cut-off signal
Connection.
4. mobile terminal according to any one of claim 1-3, which is characterized in that the tunable filtering circuit includes
At least one trap circuit；The trap circuit includes a concatenated capacitor and an inductance；
The trap signal output module includes:
Parameter value calculation submodule, for calculating capacitance and inductance value according to the interference band；
Parameter value generates submodule, for generating trap signal using the capacitance and the inductance value；
The tunable filtering circuit is also used to:
The capacitor is adjusted and is adjusted to the capacitance, by the inductance to the inductance value, so that the trap circuit exists
The impedance of the interference band is less than preset impedance threshold.
5. a kind of harmonic suppressing method of cyclical signal, which is characterized in that apply in the terminal, the mobile terminal packet
Include signal output apparatus, controller, connection switch and tunable filtering circuit the described method includes:
The signal output apparatus exports cyclical signal；
The controller determines that the cyclical signal leads to locating for the mobile terminal when detecting the cyclical signal
The interference band that letter frequency range interferes exports trap signal according to the interference band；
The controller exports connection signal when determining that the cyclical signal interferes the communications band；
The connection switch connects the signal output apparatus and the tunable filtering circuit according to the connection signal；
The tunable filtering circuit filters in the cyclical signal according to the trap signal, in the interference band
Harmonic component；
Block isolating device hinders direct current by exchange, filters the direct current letter that the tunable filtering circuit and/or the controller generate
Number.
6. according to the method described in claim 5, it is characterized in that, the mobile terminal further includes signal buffer, the side
Method further include:
The signal buffer carries out Shape correction to the cyclical signal.
7. according to the method described in claim 5, it is characterized in that, the mobile terminal further includes connection switch, the method
Further include:
For the controller when determining that the cyclical signal does not interfere with communications band locating for the mobile terminal, output disconnects letter
Number；
The connection switch disconnects the company of the signal output apparatus Yu the tunable filtering circuit according to the cut-off signal
It connects.
8. according to the described in any item methods of claim 5-7, which is characterized in that the tunable filtering circuit includes at least one
A trap circuit；The trap circuit includes a concatenated capacitor and an inductance；
It is described according to the interference band export trap signal the step of include:
Capacitance and inductance value are calculated according to the interference band；
Trap signal is generated using the capacitance and the inductance value；
It is described to be filtered in the cyclical signal according to the trap signal, the step of harmonic component in the interference band
Include:
The capacitor is adjusted and is adjusted to the capacitance, by the inductance to the inductance value, so that the trap circuit exists
The impedance of the interference band is less than preset impedance threshold.
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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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| CN108227475B (en) * | 2016-12-14 | 2021-07-06 | 中国航空工业集团公司北京航空精密机械研究所 | Suppression method for periodic interference signals of direct current motor |
| CN108418592B (en) * | 2018-01-30 | 2020-05-08 | Oppo广东移动通信有限公司 | Method for controlling radiation stray and related equipment |
| CN109889278A (en) * | 2019-02-20 | 2019-06-14 | 维沃移动通信有限公司 | Mobile terminal and the method for improving speech quality |
| CN111464204A (en) * | 2020-03-04 | 2020-07-28 | 深圳市广和通无线股份有限公司 | Radio frequency circuit and antenna tuning circuit |
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