CN106789792A - The adjusting method and terminal of a kind of Wifi frequency deviations - Google Patents
The adjusting method and terminal of a kind of Wifi frequency deviations Download PDFInfo
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- CN106789792A CN106789792A CN201710161895.0A CN201710161895A CN106789792A CN 106789792 A CN106789792 A CN 106789792A CN 201710161895 A CN201710161895 A CN 201710161895A CN 106789792 A CN106789792 A CN 106789792A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/0014—Carrier regulation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/0014—Carrier regulation
- H04L2027/0018—Arrangements at the transmitter end
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/0014—Carrier regulation
- H04L2027/0024—Carrier regulation at the receiver end
- H04L2027/0026—Correction of carrier offset
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- Computer Networks & Wireless Communication (AREA)
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Abstract
The present invention discloses the adjusting method and terminal of a kind of Wifi frequency deviations, and the method includes：Obtain current communication signal frequency values；Calculate the difference of the current communication signal frequency values and theoretical optimum traffic frequency value；If the absolute value of the difference is more than preset value, adjustment is applied to the capacitance of the ground capacity of the crystal oscillator being connected with Wifi modules, so that the difference is less than the preset value.The terminal includes Wifi modules；Frequency acquisition unit, for obtaining current communication signal frequency values；Whether microprocessor, for calculating the difference of the current communication signal frequency values and theoretical optimum traffic frequency value, and judge the absolute value of the difference more than preset value；Digital analog converter, the magnitude of voltage for adjusting the ground capacity for being applied to the crystal oscillator being connected with the Wifi modules.The present invention can guarantee that Wifi communication stabilities, can be prevented effectively from because of signal interruption abnormal problem caused by Wifi frequency deviations, lift Consumer's Experience.
Description
Technical field
The present invention relates to the technical field of wireless telecommunications, more particularly to a kind of Wifi frequency deviations adjusting method and terminal.
Background technology
With the development of science and technology, the integrated level more and more higher of chip, new technical scheme is even more and emerges in an endless stream.Terminal, example
Such as：The effect in life such as mobile phone, panel computer, watch, notebook computer, desktop computer is more and more irreplaceable.With
The arrival in 4G epoch, Wifi almost becomes the standard configuration of terminal.And it is current, certain customers are fed back after connecting occurs often in Wifi again
The phenomenon of disconnection.
Wifi communications refer to the connection between terminal and route, and as technology is increasingly advanced, user is with the index of Wifi
Also more and more higher.The leading indicator of current Wifi communications is related to frequency deviation, power, sensitivity etc..
And frequency deviation refers to the difference between practical communication frequency and theoretical communication frequency.When the difference exceedes certain limit
When, can cause that communication bit error rates are excessive and lead to not communication because frequency phase-difference is too big.
The content of the invention
Adjusting method and terminal it is a primary object of the present invention to propose a kind of Wifi frequency deviations, it is intended to adjust the logical of Wifi
Letter frequency so that error is smaller, and then realize more preferably more stable realizing data transfer.
To achieve the above object, the present invention proposes a kind of adjusting method of Wifi frequency deviations, is applied to Wifi modules
Terminal, it is characterised in that including：
Obtain current communication signal frequency values；
Calculate the difference of the current communication signal frequency values and theoretical optimum traffic frequency value；
If the absolute value of the difference is more than preset value, adjustment is applied to the magnitude of voltage of tuning capacitance, so that the difference
Value is less than the preset value, and the tuning capacitance is the ground capacity of the crystal oscillator being connected with Wifi modules.
Alternatively, the acquisition current communication signal frequency values include：
Obtain the current communication signal；
The current communication signal is amplified；
Signal of communication after amplification is carried out into square wave Shape correction；
The frequency of the signal of communication after square wave Shape correction is read as the current communication signal frequency values.
Alternatively, if the absolute value of the difference is more than preset value, adjustment is applied to the magnitude of voltage of tuning capacitance
Including：
If the difference is more than zero, and the absolute value of the difference is more than preset value, then by magnitude of voltage reduction at least
One voltage steps value；
If the difference is less than zero, and the absolute value of the difference is more than preset value, then by the magnitude of voltage increase at least
One voltage steps value.
Alternatively, if the absolute value of the difference is more than preset value, adjustment is applied to the magnitude of voltage of tuning capacitance
Including：
If the difference is more than zero, the absolute value of the difference then will more than the first preset value and less than the second preset value
One voltage steps value of the magnitude of voltage reduction；
If the difference is more than zero, the absolute value of the difference is more than or equal to second preset value, then by the electricity
Pressure value at least two voltage steps values of reduction；
If the difference is less than zero, the absolute value of the difference then will more than the first preset value and less than the second preset value
The magnitude of voltage increases a voltage steps value；
If the difference is less than zero, the absolute value of the difference is more than or equal to second preset value, then by the electricity
Pressure value increases by least two voltage steps values.
Alternatively, the voltage steps value is not more than 0.05V.
Additionally, to achieve the above object, the present invention also provides a kind of terminal, including Wifi modules, it is characterised in that bag
Include：
Frequency acquisition unit, for obtaining current communication signal frequency values；
Microprocessor, the difference for calculating the current communication signal frequency values and theoretical optimum traffic frequency value, and
Judge the absolute value of the difference whether more than preset value；
Digital analog converter, if being more than preset value for the absolute value of the difference, adjustment is applied to the electricity of tuning capacitance
Pressure value, so that the difference is less than the preset value, the tuning capacitance is the ground connection of the crystal oscillator being connected with the Wifi modules
Electric capacity.
Alternatively, the frequency acquisition unit includes：
Acquisition module, for obtaining the current communication signal；
Amplification module, for the current communication signal to be amplified；
Shaping Module, for the signal of communication after amplification to be carried out into square wave Shape correction；
Measurement module, for reading the frequency of the signal of communication after square wave Shape correction as the current communication signal frequently
Rate value.
Alternatively, the microprocessor is used for：
If the difference is more than zero, and the absolute value of the difference is more than preset value, then control the digital analog converter to make
At least one voltage steps value of the magnitude of voltage reduction；
If the difference is less than zero, and the absolute value of the difference is more than preset value, then control the digital analog converter to make
The magnitude of voltage increases by least one voltage steps value.
Alternatively, the microprocessor is used for：
If the difference is more than zero, the absolute value of the difference is then controlled more than the first preset value and less than the second preset value
Making the digital analog converter makes one voltage steps value of the magnitude of voltage reduction；
If the difference is more than zero, the absolute value of the difference is more than or equal to second preset value, then control described
Digital analog converter makes at least two voltage steps values of the magnitude of voltage reduction；
If the difference is less than zero, the absolute value of the difference is then controlled more than the first preset value and less than the second preset value
Making the digital analog converter makes the magnitude of voltage increase a voltage steps value；
If the difference is less than zero, the absolute value of the difference is more than or equal to second preset value, then control described
Digital analog converter makes the magnitude of voltage increase by least two voltage steps values.
Alternatively, the voltage steps value is not more than 0.05V.
The adjusting method and terminal of Wifi frequency deviations proposed by the present invention, the crystalline substance being connected with Wifi modules is applied to by adjustment
The magnitude of voltage of the ground capacity shaken, adjusts Wifi frequencies, it is ensured that Wifi communication stabilities, can be prevented effectively from because Wifi frequency deviations cause
Signal interruption abnormal problem, lifted Consumer's Experience.
Brief description of the drawings
Fig. 1 is the hardware architecture diagram of the mobile terminal for realizing each embodiment of the invention；
Fig. 2 is the schematic flow sheet of adjusting method one embodiment of Wifi frequency deviations of the present invention；
Fig. 3 is the part schematic flow sheet of another embodiment of the adjusting method of Wifi frequency deviations of the present invention；
Fig. 4 is the part schematic flow sheet of another embodiment of the adjusting method of Wifi frequency deviations of the present invention；
Fig. 5 is the part schematic flow sheet of another embodiment of the adjusting method of Wifi frequency deviations of the present invention；
Fig. 6 is the structural representation of one embodiment of terminal of the present invention；
Fig. 7 is the structural representation of another embodiment of terminal of the present invention；
The realization of the object of the invention, functional characteristics and advantage will be described further referring to the drawings in conjunction with the embodiments.
Specific embodiment
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
The mobile terminal of each embodiment of the invention is realized referring now to Description of Drawings.In follow-up description, use
For represent element such as " module ", " part " or " unit " suffix only for being conducive to explanation of the invention, itself
Not specific meaning.Therefore, " module " can be used mixedly with " part ".
Mobile terminal can be implemented in a variety of manners.For example, the terminal described in the present invention can include such as moving
Phone, smart phone, notebook computer, digit broadcasting receiver, PDA (personal digital assistant), PAD (panel computer), PMP
The mobile terminal of (portable media player), guider etc. and such as numeral TV, desktop computer etc. are consolidated
Determine terminal.Hereinafter it is assumed that terminal is mobile terminal.However, it will be understood by those skilled in the art that, except being used in particular for movement
Outside the element of purpose, construction according to the embodiment of the present invention can also apply to the terminal of fixed type.
Fig. 1 is the hardware architecture diagram for realizing the optional intelligent terminal of each embodiment one of the invention.
Intelligent terminal 100 can include wireless communication unit 110, A/V (audio/video) input block 120, user input
Unit 130, sensing unit 140, output unit 150, memory 160, interface unit 170, controller 180 and power subsystem 190
Etc..
Fig. 1 shows the mobile terminal 1 00 with various assemblies, it should be understood that being not required for implementing all showing
The component for going out.More or less component can alternatively be implemented.The element of mobile terminal 1 00 will be discussed in more detail below.
Wireless communication unit 110 can generally include one or more assemblies, and it allows mobile terminal 1 00 and radio communication
Radio communication between system or network.For example, wireless communication unit 110 can include that broadcasting reception module 111, movement are logical
At least one of letter module 112, wireless Internet module 113, short range communication module 114 and location information module 115.
Broadcasting reception module 111 receives broadcast singal and/or broadcast via broadcast channel from external broadcast management server
Relevant information.Broadcast channel can include satellite channel and/or terrestrial channel.Broadcast management server can be generated and sent
The broadcast singal and/or broadcast related information generated before the server or reception of broadcast singal and/or broadcast related information
And send it to the server of terminal.Broadcast singal can include TV broadcast singals, radio signals, data broadcasting
Signal etc..And, broadcast singal may further include the broadcast singal combined with TV or radio signals.Broadcast phase
Pass information can also be provided via mobile communications network, and in this case, broadcast related information can be by mobile communication mould
Block 112 is received.Broadcast singal can exist in a variety of manners, for example, it can be with the electronics of DMB (DMB)
The form of program guide (EPG), the electronic service guidebooks (ESG) of digital video broadcast-handheld (DVB-H) etc. and exist.Broadcast
Receiver module 111 can receive signal and broadcast by using various types of broadcast systems.Especially, broadcasting reception module 111
Can be wide by using such as multimedia broadcasting-ground (DMB-T), DMB-satellite (DMB-S), digital video
Broadcast-hand-held (DVB-H), Radio Data System, the received terrestrial digital broadcasting integrated service of forward link media (MediaFLO@)
Etc. (ISDB-T) digit broadcasting system receives digital broadcasting.Broadcasting reception module 111 may be constructed such that and be adapted to provide for extensively
Broadcast the various broadcast systems and above-mentioned digit broadcasting system of signal.Via broadcasting reception module 111 receive broadcast singal and/
Or broadcast related information can be stored in memory 160 (or other types of storage medium).
Mobile communication module 112 sends radio signals to base station (for example, access point, node B etc.), exterior terminal
And at least one of server and/or receive from it radio signal.Such radio signal can be logical including voice
Words signal, video calling signal or the various types of data for sending and/or receiving according to text and/or Multimedia Message.
Wireless Internet module 113 supports the Wi-Fi (Wireless Internet Access) of mobile terminal.The module can be internally or externally
It is couple to terminal.Wi-Fi (Wireless Internet Access) technology involved by the module can include WLAN (WLAN) (Wi-Fi), Wibro
(WiMAX), Wimax (worldwide interoperability for microwave accesses), HSDPA (high-speed downlink packet access) etc..
Short range communication module 114 is the module for supporting junction service.Some examples of short-range communication technology include indigo plant
Tooth TM, radio frequency identification (RFID), Infrared Data Association (IrDA), ultra wide band (UWB), purple honeybee TM etc..
Location information module 115 is the module for checking or obtaining the positional information of mobile terminal.Location information module
115 typical case is GPS (global positioning system).According to current technology, GPS calculate from three or more satellites away from
Information application triangulation from information and correct time information and for calculating, so as to according to longitude, latitude and height
Degree calculates three-dimensional current location information exactly.Currently, three satellites are used simultaneously for calculating the method for position and temporal information
And the position by using other satellite correction calculating and the error of temporal information.Additionally, GPS can be by real time
Continuous plus current location information carrys out calculating speed information.
A/V input blocks 120 are used to receive audio or video signal.A/V input blocks 120 can include the He of camera 121
Microphone wind 122, the static map that 121 pairs, camera is obtained in Video Capture pattern or image capture mode by image capture apparatus
The view data of piece or video is processed.Picture frame after treatment may be displayed on display unit 151.At camera 121
Picture frame after reason can be stored in memory 160 (or other storage mediums) or carried out via wireless communication unit 110
Send, two or more cameras 121 can be provided according to the construction of mobile terminal 1 00.Microphone wind 122 can be in telephone relation
Sound (voice data) is received via microphone wind 122 in pattern, logging mode, speech recognition mode etc. operational mode, and
And can be voice data by such acoustic processing.Audio (voice) data after treatment can be in the feelings of telephone calling model
The form that being converted under condition can be sent to mobile communication base station via mobile communication module 112 is exported.Microphone wind 122 can be real
Various types of noises elimination (or suppression) algorithms are applied to eliminate (or suppression) product during receiving and sending audio signal
Raw noise or interference.
User input unit 130 can generate key input data to control mobile terminal 1 00 according to the order of user input
Various operations.User input unit 130 allow the various types of information of user input, and can include keyboard, metal dome,
Touch pad (for example, detection due to being touched caused by resistance, pressure, electric capacity etc. change sensitive component), roller, shake
Bar etc..Especially, when touch pad is superimposed upon on display unit 151 in the form of layer, touch-screen can be formed.
Sensing unit 140 detects the current state of mobile terminal 1 00, (for example, mobile terminal 1 00 opens or closes shape
State), the presence or absence of the contact (that is, touch input) of the position of mobile terminal 1 00, user for mobile terminal 1 00, mobile terminal
The acceleration or deceleration movement of 100 orientation, mobile terminal 1 00 and direction etc., and generate for controlling mobile terminal 1 00
The order of operation or signal.For example, when mobile terminal 1 00 is embodied as sliding-type mobile phone, sensing unit 140 can be sensed
The sliding-type phone is opened or closed.In addition, sensing unit 140 can detect power subsystem 190 whether provide electric power or
Whether person's interface unit 170 couples with external device (ED).Sensing unit 140 can include proximity transducer 141.
Interface unit 170 is connected the interface that can pass through with mobile terminal 1 00 as at least one external device (ED).For example,
External device (ED) can include wired or wireless head-band earphone port, external power source (or battery charger) port, wired or nothing
Line FPDP, memory card port, the port for connecting the device with identification module, audio input/output (I/O) end
Mouth, video i/o port, ear port etc..Identification module can be that storage uses each of mobile terminal 1 00 for verifying user
Kind of information and subscriber identification module (UIM), client identification module (SIM), Universal Subscriber identification module (USIM) can be included
Etc..In addition, the device (hereinafter referred to as " identifying device ") with identification module can take the form of smart card, therefore, know
Other device can be connected via port or other attachment means with mobile terminal 1 00.Interface unit 170 can be used for reception and come from
The input (for example, data message, electric power etc.) of the external device (ED) and input that will be received is transferred in mobile terminal 1 00
One or more elements can be used for transmitting data between mobile terminal 1 00 and external device (ED).
In addition, when mobile terminal 1 00 is connected with external base, interface unit 170 can serve as allowing by it by electricity
Power provides to the path of mobile terminal 1 00 from base or can serve as allowing the various command signals being input into from base to pass through it
It is transferred to the path of mobile terminal 1 00.Can serve as recognizing mobile terminal 1 00 from the various command signals or electric power of base input
Whether signal base on is accurately fitted within.Output unit 150 is configured to be provided with vision, audio and/or tactile manner
Output signal (for example, audio signal, vision signal, alarm signal, vibration signal etc.).Output unit 150 can include aobvious
Show unit 151, dio Output Modules 152, alarm unit 153 etc..
Display unit 151 may be displayed on the information processed in mobile terminal 1 00.For example, when mobile terminal 1 00 is in electricity
During words call mode, display unit 151 can show and converse or other communicate (for example, text messaging, multimedia file
Download etc.) related user interface (UI) or graphic user interface (GUI).When mobile terminal 1 00 is in video calling pattern
Or during image capture mode, display unit 151 can show the image of capture and/or the image of reception, show video or figure
UI or GUI of picture and correlation function etc..
Meanwhile, when display unit 151 and touch pad in the form of layer it is superposed on one another to form touch-screen when, display unit
151 can serve as input unit and output device.Display unit 151 can include liquid crystal display (LCD), thin film transistor (TFT)
In LCD (TFT-LCD), Organic Light Emitting Diode (OLED) display, flexible display, three-dimensional (3D) display etc. at least
It is a kind of.Some in these displays may be constructed such that transparence to allow user to be watched from outside, and this is properly termed as transparent
Display, typical transparent display can be, for example, TOLED (transparent organic light emitting diode) display etc..According to specific
Desired implementation method, mobile terminal 1 00 can include two or more display units (or other display devices), for example, moving
Dynamic terminal 100 can include outernal display unit (not shown) and inner display unit (not shown).Touch-screen can be used to detect
Touch input pressure and touch input position and touch input area.
Dio Output Modules 152 can be in call signal reception pattern, call mode, record mould in mobile terminal 1 00
It is that wireless communication unit 110 is received or in memory when under the isotypes such as formula, speech recognition mode, broadcast reception mode
In 160 store voice data transducing audio signal and be output as sound.And, dio Output Modules 152 can provide with
The audio output of the specific function correlation that mobile terminal 1 00 is performed is (for example, call signal receives sound, message sink sound etc.
Deng).Dio Output Modules 152 can include loudspeaker, buzzer etc..
Alarm unit 153 can provide output and be notified to mobile terminal 1 00 with by event.Typical event can be with
Including calling reception, message sink, key signals input, touch input etc..In addition to audio or video is exported, alarm unit
153 can in a different manner provide output with the generation of notification event.For example, alarm unit 153 can be in the form of vibrating
Output is provided, when calling, message or some other entrance communication (incoming communication) are received, alarm list
Unit 153 can provide tactile output (that is, vibrating) to notify to user.Exported by providing such tactile, even if
When in pocket of the mobile phone of user in user, user also can recognize that the generation of various events.Alarm unit 153
The output of the generation of notification event can be provided via display unit 151 or dio Output Modules 152.
Memory 160 can store software program for the treatment and control operation performed by controller 180 etc., Huo Zheke
Temporarily to store oneself data (for example, telephone directory, message, still image, video etc.) through exporting or will export.And
And, memory 160 can store the vibration of various modes on being exported when touching and being applied to touch-screen and audio signal
Data.
Memory 160 can include the storage medium of at least one type, and the storage medium includes flash memory, hard disk, many
Media card, card-type memory (for example, SD or DX memories etc.), random access storage device (RAM), static random-access storage
Device (SRAM), read-only storage (ROM), Electrically Erasable Read Only Memory (EEPROM), programmable read only memory
(PROM), magnetic storage, disk, CD etc..And, mobile terminal 1 00 can perform memory with by network connection
The network storage device cooperation of 160 store function.
The overall operation of the generally control mobile terminal of controller 180.For example, controller 180 is performed and voice call, data
Communication, video calling etc. related control and treatment.In addition, controller 180 can be included for reproducing (or playback) many matchmakers
The multi-media module 181 of volume data, multi-media module 181 can be constructed in controller 180, or can be structured as and control
Device 180 is separated.Controller 180 can be with execution pattern identifying processing, the handwriting input that will be performed on the touchscreen or picture
Draw input and be identified as character or image.
Power subsystem 190 receives external power or internal power under the control of controller 180 and provides operation each unit
Appropriate electric power needed for part and component.
Various implementation methods described herein can be with use such as computer software, hardware or its any combination of calculating
Machine computer-readable recording medium is implemented.Implement for hardware, implementation method described herein can be by using application-specific IC
(ASIC), digital signal processor (DSP), digital signal processing device (DSPD), programmable logic device (PLD), scene can
Programming gate array (FPGA), processor, controller, microcontroller, microprocessor, it is designed to perform function described herein
At least one in electronic unit is implemented, and in some cases, such implementation method can be implemented in controller 180.
For software implementation, the implementation method of such as process or function can with allow to perform the single of at least one function or operation
Software module is implemented.Software code can be come by the software application (or program) write with any appropriate programming language
Implement, software code can be stored in memory 160 and performed by controller 180.
So far, oneself according to its function through describing mobile terminal 1 00.In addition, the mobile terminal 1 00 in the embodiment of the present invention
Can be such as folded form, board-type, oscillating-type, sliding-type and other various types of mobile terminals, not do herein specifically
Limit.
Based on above-mentioned mobile terminal hardware configuration, the inventive method each embodiment is proposed.
As shown in Fig. 2 the present invention provides a kind of one of embodiment of the adjusting method of Wifi frequency deviations, it is applied to have
The terminal of Wifi modules, including step：
201st, start；
202nd, current communication signal frequency values are obtained；
203rd, the difference of the current communication signal frequency values and theoretical optimum traffic frequency value is calculated；
Above-mentioned theory optimum traffic frequency value refers to that, according to protocol communication requirement, the communication channel that Wifi is fixed correspond to solid
Fixed frequency；The difference is the value that current communication signal frequency values subtract theoretical optimum traffic frequency value；
204th, whether the absolute value of the difference is judged more than preset value, if so, then enter step 205, if it is not, then entering
Step 206；
Above-mentioned preset value is 15 to 25ppm, e.g. 20ppm；
205th, adjustment is applied to the magnitude of voltage of tuning capacitance；
Wherein, tuning capacitance refers to the ground capacity of the crystal oscillator being connected with Wifi modules；More specifically, crystal oscillator offer is humorous
Vibration frequency provides reference data frequency for Wifi modules, according to the computing formula of resonant frequency：Its
In, L is induction reactance, and C refers to capacitive reactance；Understand that the resonant frequency that crystal oscillator is provided is determined by equivalent inductance with equivalent capacity.Therefore, change is worked as
During the electric capacity of crystal oscillator both sides ground capacity, that is, equivalent capacity is changed, therefore resonant frequency can be with the change of equivalent capacity
Change；And the capacitance characteristic of tuning capacitance and control voltage into certain reversely proportionate relationship, therefore, tuning is applied to by adjustment
The magnitude of voltage of electric capacity can just change the electric capacity of the tuning capacitance；
206th, terminate.
In another embodiment of the invention, adjustment is applied to after the magnitude of voltage of tuning capacitance, can also be repeatedly above-mentioned
Step 202 is to 205, until the absolute value of the difference is less than or equal to preset value.
On the basis of the corresponding embodiments of above-mentioned Fig. 2, the adjusting method of Wifi frequency deviations provided in an embodiment of the present invention
In another alternative embodiment, as shown in figure 3, when current communication signal frequency values are obtained, including：
301st, start；
302nd, the current communication signal is obtained；
303rd, the current communication signal is amplified；
304th, the signal of communication after amplification is carried out into square wave Shape correction；
305th, the frequency of the signal of communication after square wave Shape correction is read as the current communication signal frequency values；
In the specific implementation, frequency can be acquired using counter type, wherein counter type refers to exist
The quantity of rising edge or trailing edge is calculated in certain hour；
307th, terminate.
It is first that Wifi signals carry out square wave by current communication signal when terminal is communicated with route in the present embodiment
Shaping, is then acquired using counter type to frequency, and wherein counter type refers to calculate within a certain period of time
Rise the quantity of edge or trailing edge.
On the basis of the corresponding embodiments of above-mentioned Fig. 2, the adjusting method of Wifi frequency deviations provided in an embodiment of the present invention
In another alternative embodiment, as shown in figure 4, whether the absolute value for judging the difference is more than preset value, if so, then adjusting
The whole magnitude of voltage for being applied to tuning capacitance, specifically includes：
401st, start；
402nd, whether the absolute value of the difference is judged more than preset value, if so, then entering step 403；If it is not, then entering
Step 406；
403rd, whether the difference is judged more than zero, if so, then entering step 404；If it is not, then entering step 405；
404th, the magnitude of voltage at least one voltage steps value of reduction of tuning capacitance will be applied to；
405th, the magnitude of voltage that will be applied to tuning capacitance increases by least one voltage steps value；
406th, terminate.
If it should be noted that difference more than zero and the difference absolute value be more than preset value, show present communications believe
Number frequency values are more than theoretical optimum traffic frequency value and preset value sum, according to resonant frequency equation
Go out by increasing equivalent C values, the reduction of current communication signal frequency values can be made；And the capacitance characteristic of tuning capacitance and control voltage into
Certain reversely proportionate relationship, therefore, a voltage steps value γ is set herein, the magnitude of voltage that will be applied to tuning capacitance is reduced to
A few voltage steps value, then can increase C values with certain value, so that current communication signal frequency values are more nearly theory most preferably
Communication frequency value.
If difference less than zero and the difference absolute value be more than preset value, show current communication signal frequency values less than reason
By optimum traffic frequency value and the difference of preset value, according to resonant frequency equationDraw by reducing equivalent C
Value, can raise current communication signal frequency values；And the capacitance characteristic and control voltage of tuning capacitance are closed into certain reversely ratio
System, therefore, a voltage steps value γ is set herein, the magnitude of voltage that will be applied to tuning capacitance increases by least one voltage steps
Value, then can increase C values, so that current communication signal frequency values are more nearly theoretical optimum traffic frequency value with certain value.
On the basis of the corresponding embodiments of above-mentioned Fig. 2, the adjusting method of Wifi frequency deviations provided in an embodiment of the present invention
In another alternative embodiment, as shown in figure 5, whether the absolute value for judging the difference is more than preset value, if so, then adjusting
The whole magnitude of voltage for being applied to tuning capacitance, specifically includes：
501st, start；
502nd, whether the absolute value of the difference is judged more than the first preset value, if so, then entering step 503；If it is not, then
Into step 510；
503rd, whether the absolute value of the difference is judged less than the second preset value, if so, then entering step 504；If it is not, then
Into step 507；
Wherein, the second preset value is more than the first preset value；
504th, judge the difference whether more than zero；If so, then entering step 505；If it is not, then entering step 506；
505th, magnitude of voltage one voltage steps value of reduction of tuning capacitance will be applied to；
506th, the magnitude of voltage that will be applied to tuning capacitance increases a voltage steps value；
507th, judge the difference whether more than zero；If so, then entering step 508；If it is not, then entering step 509；
508th, the magnitude of voltage at least two voltage steps values of reduction of tuning capacitance will be applied to；
509th, the magnitude of voltage that will be applied to tuning capacitance increases by least two voltage steps values；
510th, terminate.
It can be seen that, in the present embodiment, if the difference is more than zero, the absolute value of the difference is more than the first preset value and small
In the second preset value, then by the magnitude of voltage one voltage steps value of reduction；If the difference be more than zero, the difference it is absolute
Value is more than or equal to second preset value, then by the magnitude of voltage at least two voltage steps values of reduction；If the difference is small
In zero, the magnitude of voltage is then increased an electricity by the absolute value of the difference more than the first preset value and less than the second preset value
Pressure step value；If the difference is less than zero, the absolute value of the difference is more than or equal to second preset value, then by the electricity
Pressure value increases by least two voltage steps values.In this way, current communication signal frequency values close to theory optimal communication can quickly be made
Frequency values.
On the basis of the corresponding embodiments of above-mentioned Fig. 4 or Fig. 5, the regulation side of Wifi frequency deviations provided in an embodiment of the present invention
In another alternative embodiment of method, voltage steps value is not more than 0.05V.
It should be noted that in the above-described embodiments, because the ground capacity of crystal oscillator is generally two, that is to say, that have two
Individual tuning capacitance, in regulation voltage level, can only adjust one every time, it is preferable that two tuning capacitances are adjusted simultaneously
Section；Additionally, the corresponding voltage steps value of two tuning capacitances can be with identical, it is also possible to different, the present invention is not limited this
System.
The adjusting method to the Wifi frequency deviations in the embodiment of the present invention is described above, below to the embodiment of the present invention
In terminal be described.
As shown in fig. 6, the present invention proposes a kind of one of embodiment of terminal, including Wifi modules 10, frequency acquisition
Unit 20, microprocessor 30, digital analog converter 40.
Wherein, frequency acquisition unit 20 is used to obtain current communication signal frequency values；Microprocessor 30 is used to calculate described
The difference of current communication signal frequency values and theoretical optimum traffic frequency value, and judge the absolute value of the difference whether more than pre-
If value.Above-mentioned theory optimum traffic frequency value refers to that, according to protocol communication requirement, the communication channel that Wifi is fixed correspond to fix
Frequency；The difference is the value that current communication signal frequency values subtract theoretical optimum traffic frequency value.
If the absolute value that digital analog converter 40 is used for the difference is more than preset value, adjustment is applied to tuning capacitance 60
Magnitude of voltage, so that the difference is less than the preset value, the tuning capacitance 60 is the crystal oscillator being connected with the Wifi modules 10
50 ground capacity.Above-mentioned preset value is 15 to 25ppm, e.g. 20ppm.More specifically, the resonant frequency that crystal oscillator is provided is
Wifi modules provide reference data frequency, according to the computing formula of resonant frequency：Wherein, L is sense
Anti-, C refers to capacitive reactance；Understand that the resonant frequency that crystal oscillator is provided is determined by equivalent inductance with equivalent capacity.Therefore, when change crystal oscillator both sides
During the electric capacity of ground capacity, that is, equivalent capacity is changed, therefore resonant frequency can change with the change of equivalent capacity；And adjust
The capacitance characteristic of humorous electric capacity and control voltage into certain reversely proportionate relationship, therefore, the electricity of tuning capacitance is applied to by adjustment
Pressure value can just change the electric capacity of the tuning capacitance.
As shown in fig. 7, the present invention proposes a kind of another embodiment of terminal, including Wifi modules 10, frequency acquisition list
Unit 20, microprocessor 30, digital analog converter 40.
Wherein, frequency acquisition unit 20 is used to obtain current communication signal frequency values；In the present embodiment, frequency acquisition unit
20 include：Acquisition module 21, for obtaining the current communication signal；Amplification module 22, for by the current communication signal
It is amplified；Shaping Module 23, for the signal of communication after amplification to be carried out into square wave Shape correction；Measurement module 24, for reading
The frequency of the signal of communication after square wave Shape correction is taken as the current communication signal frequency values；In the specific implementation, can be with
Frequency is acquired using counter type, wherein counter type refer to i.e. within a certain period of time calculate rising edge or under
The quantity on edge drops.
In the specific implementation, at least one of above-mentioned acquisition module 21 and amplification module 22 can be integrated in Wifi modules
In 10.
Microprocessor 30 is used to calculate the difference of the current communication signal frequency values and theoretical optimum traffic frequency value, and
Judge the absolute value of the difference whether more than preset value.Above-mentioned theory optimum traffic frequency value refers to will according to protocol communication
Ask, the communication channel that Wifi is fixed correspond to fixed frequency；The difference is theoretical optimal for current communication signal frequency values are subtracted
The value of communication frequency value.
If the absolute value that digital analog converter 40 is used for the difference is more than preset value, adjustment is applied to tuning capacitance 60
Magnitude of voltage, the tuning capacitance 60 is the ground capacity of the crystal oscillator 50 being connected with the Wifi modules 10.More specifically, crystal oscillator is carried
The resonant frequency of confession provides reference data frequency for Wifi modules, and the resonant frequency that crystal oscillator is provided by equivalent inductance with it is equivalent
Electric capacity is determined.When the electric capacity of crystal oscillator both sides ground capacity is changed, that is, change equivalent capacity, thus resonant frequency can with etc.
Imitate the change of electric capacity and change；And the capacitance characteristic of tuning capacitance and control voltage into certain reversely proportionate relationship, therefore, pass through
The magnitude of voltage that adjustment is applied to tuning capacitance can just change the electric capacity of the tuning capacitance.
The present invention proposes a kind of another embodiment of terminal, including Wifi modules 10, frequency acquisition unit 20, microprocessor
Device 30, digital analog converter 40.
Wherein, frequency acquisition unit 20 is used to obtain current communication signal frequency values；In the present embodiment, frequency acquisition unit
20 include：Acquisition module 21, for obtaining the current communication signal；Amplification module 22, for by the current communication signal
It is amplified；Shaping Module 23, for the signal of communication after amplification to be carried out into square wave Shape correction；Measurement module 24, for reading
The frequency of the signal of communication after square wave Shape correction is taken as the current communication signal frequency values；In the specific implementation, can be with
Frequency is acquired using counter type, wherein counter type refer to i.e. within a certain period of time calculate rising edge or under
The quantity on edge drops.
Microprocessor 30 is used to calculate the difference of the current communication signal frequency values and theoretical optimum traffic frequency value, and
Judge the absolute value of the difference whether more than preset value.Above-mentioned theory optimum traffic frequency value refers to will according to protocol communication
Ask, the communication channel that Wifi is fixed correspond to fixed frequency；The difference is theoretical optimal for current communication signal frequency values are subtracted
The value of communication frequency value.
The microprocessor 30 is additionally operable to：If the difference is more than zero, and the absolute value of the difference is more than preset value, then
Controlling the digital analog converter makes at least one voltage steps value of the magnitude of voltage reduction；If the difference is less than zero, and described
The absolute value of difference is more than preset value, then control the digital analog converter magnitude of voltage is increased by least one voltage steps
Value.
If it should be noted that difference more than zero and the difference absolute value be more than preset value, show present communications believe
Number frequency values are more than theoretical optimum traffic frequency value and preset value sum, according to resonant frequency equation
Go out by increasing equivalent C values, the reduction of current communication signal frequency values can be made；And the capacitance characteristic of tuning capacitance and control voltage into
Certain reversely proportionate relationship, therefore, a voltage steps value γ is set herein, the magnitude of voltage that will be applied to tuning capacitance is reduced to
A few voltage steps value, then can increase C values with certain value, so that current communication signal frequency values are more nearly theory most preferably
Communication frequency value.
If difference less than zero and the difference absolute value be more than preset value, show current communication signal frequency values less than reason
By optimum traffic frequency value and the difference of preset value, according to resonant frequency equationDraw by reducing equivalent C
Value, can raise current communication signal frequency values；And the capacitance characteristic and control voltage of tuning capacitance are closed into certain reversely ratio
System, therefore, a voltage steps value γ is set herein, the magnitude of voltage that will be applied to tuning capacitance increases by least one voltage steps
Value, then can increase C values, so that current communication signal frequency values are more nearly theoretical optimum traffic frequency value with certain value.This
In embodiment, a voltage steps value is not more than 0.05V.
If the absolute value that digital analog converter 40 is used for the difference is more than preset value, adjustment is applied to tuning capacitance 60
Magnitude of voltage, so that the difference is less than the preset value, the tuning capacitance 60 is the crystal oscillator being connected with the Wifi modules 10
50 ground capacity.More specifically, the resonant frequency that crystal oscillator is provided is for Wifi modules provide reference data frequency, and crystal oscillator is carried
The resonant frequency of confession is determined by equivalent inductance with equivalent capacity.When the electric capacity of crystal oscillator both sides ground capacity is changed, that is, change
Equivalent capacity, therefore resonant frequency can change with the change of equivalent capacity；And the capacitance characteristic of tuning capacitance and control electricity
Certain reversely proportionate relationship is pressed into, therefore, the magnitude of voltage for being applied to tuning capacitance by adjustment can just change the tuning capacitance
Electric capacity.
The present invention proposes a kind of another embodiment of terminal, including Wifi modules 10, frequency acquisition unit 20, microprocessor
Device 30, digital analog converter 40.
Wherein, frequency acquisition unit 20 is used to obtain current communication signal frequency values；In the present embodiment, frequency acquisition unit
20 include：Acquisition module 21, for obtaining the current communication signal；Amplification module 22, for by the current communication signal
It is amplified；Shaping Module 23, for the signal of communication after amplification to be carried out into square wave Shape correction；Measurement module 24, for reading
The frequency of the signal of communication after square wave Shape correction is taken as the current communication signal frequency values；In the specific implementation, can be with
Frequency is acquired using counter type, wherein counter type refer to i.e. within a certain period of time calculate rising edge or under
The quantity on edge drops.
Microprocessor 30 is used to calculate the difference of the current communication signal frequency values and theoretical optimum traffic frequency value, and
Judge the absolute value of the difference whether more than preset value.Above-mentioned theory optimum traffic frequency value refers to will according to protocol communication
Ask, the communication channel that Wifi is fixed correspond to fixed frequency；The difference is theoretical optimal for current communication signal frequency values are subtracted
The value of communication frequency value.
The microprocessor 30 is additionally operable to：If the difference is more than zero, the absolute value of the difference is more than the first preset value
And less than the second preset value, then control the digital analog converter to make one voltage steps value of the magnitude of voltage reduction；If the difference
Value is more than zero, and the absolute value of the difference is more than or equal to second preset value, then control the digital analog converter to make described
Magnitude of voltage at least two voltage steps values of reduction；If the difference is less than zero, the absolute value of the difference is more than the first preset value
And less than the second preset value, then control the digital analog converter magnitude of voltage is increased a voltage steps value；If the difference
Value is less than zero, and the absolute value of the difference is more than or equal to second preset value, then control the digital analog converter to make described
Magnitude of voltage increases by least two voltage steps values.In this way, can quickly make current communication signal frequency values most preferably lead to close to theoretical
Letter frequency values.In the present embodiment, a voltage steps value is not more than 0.05V.
If the absolute value that digital analog converter 40 is used for the difference is more than preset value, adjustment is applied to tuning capacitance 60
Magnitude of voltage, so that the difference is less than the preset value, the tuning capacitance 60 is the crystal oscillator being connected with the Wifi modules 10
50 ground capacity.More specifically, the resonant frequency that crystal oscillator is provided is for Wifi modules provide reference data frequency, and crystal oscillator is carried
The resonant frequency of confession is determined by equivalent inductance with equivalent capacity.When the electric capacity of crystal oscillator both sides ground capacity is changed, that is, change
Equivalent capacity, therefore resonant frequency can change with the change of equivalent capacity；And the capacitance characteristic of tuning capacitance and control electricity
Certain reversely proportionate relationship is pressed into, therefore, the magnitude of voltage for being applied to tuning capacitance by adjustment can just change the tuning capacitance
Electric capacity.
It should be noted that terminal in the above-described embodiments, because the ground capacity of crystal oscillator is generally two, that is,
Two tuning capacitances are said, in regulation voltage level, one can have only been adjusted every time, it is preferable that to two tuning capacitances simultaneously
It is adjusted；Additionally, the corresponding voltage steps value of two tuning capacitances can be with identical, it is also possible to different, the present invention to this simultaneously
It is not limited.
The adjusting method and terminal of Wifi frequency deviations proposed by the present invention, take out signal of communication at Wifi modules, are passed through
Cross amplification, square wave shaping, again read out its frequency to processor；Processor reads the actual present communications of Wifi modules
Can be contrasted with theoretical optimum traffic frequency value after signal frequency value, when both differences exceed certain threshold value, be started
Digital analog converter DAC is adjusted to tuning capacitance, and then the absolute value of both differences is maintained within preset value, it is ensured that
Wifi communication stabilities, can be prevented effectively from because of signal interruption abnormal problem caused by Wifi frequency deviations, lift Consumer's Experience.
It should be noted that herein, term " including ", "comprising" or its any other variant be intended to non-row
His property is included, so that process, method, article or device including a series of key elements not only include those key elements, and
And also include other key elements being not expressly set out, or also include for this process, method, article or device institute are intrinsic
Key element.In the absence of more restrictions, the key element limited by sentence "including a ...", it is not excluded that including this
Also there is other identical element in the process of key element, method, article or device.
The embodiments of the present invention are for illustration only, and the quality of embodiment is not represented.
Through the above description of the embodiments, those skilled in the art can be understood that above-described embodiment side
Method can add the mode of required general hardware platform to realize by software, naturally it is also possible to by hardware, but in many cases
The former is more preferably implementation method.Based on such understanding, technical scheme is substantially done to prior art in other words
The part for going out contribution can be embodied in the form of software product, and the computer software product is stored in a storage medium
In (such as ROM/RAM, magnetic disc, CD), including some instructions are used to so that a station terminal equipment (can be mobile phone, computer, clothes
Business device, air-conditioner, or network equipment etc.) perform method described in each embodiment of the invention.
The preferred embodiments of the present invention are these are only, the scope of the claims of the invention is not thereby limited, it is every to utilize this hair
Equivalent structure or equivalent flow conversion that bright specification and accompanying drawing content are made, or directly or indirectly it is used in other related skills
Art field, is included within the scope of the present invention.
Claims (10)
1. a kind of adjusting method of Wifi frequency deviations, is applied to the terminal with Wifi modules, it is characterised in that including：
Obtain current communication signal frequency values；
Calculate the difference of the current communication signal frequency values and theoretical optimum traffic frequency value；
If the absolute value of the difference is more than preset value, adjustment is applied to the magnitude of voltage of tuning capacitance, so that the difference is small
In the preset value, the tuning capacitance is the ground capacity of the crystal oscillator being connected with Wifi modules.
2. the adjusting method of Wifi frequency deviations according to claim 1, it is characterised in that the acquisition current communication signal is frequently
Rate value includes：
Obtain the current communication signal；
The current communication signal is amplified；
Signal of communication after amplification is carried out into square wave Shape correction；
The frequency of the signal of communication after square wave Shape correction is read as the current communication signal frequency values.
3. the adjusting method of Wifi frequency deviations according to claim 1, it is characterised in that if the absolute value of the difference
More than preset value, then adjustment is applied to the magnitude of voltage of tuning capacitance and includes：
If the difference is more than zero, and the absolute value of the difference is more than preset value, then by magnitude of voltage reduction by least one
Voltage steps value；
If the difference is less than zero, and the absolute value of the difference is more than preset value, then the magnitude of voltage is increased at least one
Voltage steps value.
4. the adjusting method of Wifi frequency deviations according to claim 1, it is characterised in that if the absolute value of the difference is big
In preset value, then adjustment is applied to the magnitude of voltage of tuning capacitance and includes：
If the difference is more than zero, the absolute value of the difference, then will be described more than the first preset value and less than the second preset value
Magnitude of voltage one voltage steps value of reduction；
If the difference is more than zero, the absolute value of the difference is more than or equal to second preset value, then by the magnitude of voltage
Reduce by least two voltage steps values；
If the difference is less than zero, the absolute value of the difference, then will be described more than the first preset value and less than the second preset value
Magnitude of voltage increases a voltage steps value；
If the difference is less than zero, the absolute value of the difference is more than or equal to second preset value, then by the magnitude of voltage
Increase by least two voltage steps values.
5. according to claim 3 or 4 Wifi frequency deviations adjusting method, it is characterised in that the voltage steps value is not more than
0.05V。
6. a kind of terminal, including Wifi module, it is characterised in that including：
Frequency acquisition unit, for obtaining current communication signal frequency values；
Microprocessor, for calculating the difference of the current communication signal frequency values and theoretical optimum traffic frequency value, and judges
Whether the absolute value of the difference is more than preset value；
Digital analog converter, if being more than preset value for the absolute value of the difference, adjustment is applied to the magnitude of voltage of tuning capacitance,
So that the difference is less than the preset value, the tuning capacitance is the ground capacity of the crystal oscillator being connected with the Wifi modules.
7. terminal according to claim 6, it is characterised in that the frequency acquisition unit includes：
Acquisition module, for obtaining the current communication signal；
Amplification module, for the current communication signal to be amplified；
Shaping Module, for the signal of communication after amplification to be carried out into square wave Shape correction；
Measurement module, for reading the frequency of the signal of communication after square wave Shape correction as the current communication signal frequency
Value.
8. mobile terminal according to claim 6, it is characterised in that the microprocessor is used for：
If the difference is more than zero, and the absolute value of the difference is more than preset value, then control the digital analog converter to make described
Magnitude of voltage at least one voltage steps value of reduction；
If the difference is less than zero, and the absolute value of the difference is more than preset value, then control the digital analog converter to make described
Magnitude of voltage increases by least one voltage steps value.
9. mobile terminal according to claim 6, it is characterised in that the microprocessor is used for：
If the difference is more than zero, the absolute value of the difference then controls institute more than the first preset value and less than the second preset value
Stating digital analog converter makes one voltage steps value of the magnitude of voltage reduction；
If the difference is more than zero, the absolute value of the difference is more than or equal to second preset value, then control the digital-to-analogue
Converter makes at least two voltage steps values of the magnitude of voltage reduction；
If the difference is less than zero, the absolute value of the difference then controls institute more than the first preset value and less than the second preset value
Stating digital analog converter makes the magnitude of voltage increase a voltage steps value；
If the difference is less than zero, the absolute value of the difference is more than or equal to second preset value, then control the digital-to-analogue
Converter makes the magnitude of voltage increase by least two voltage steps values.
10. mobile terminal according to claim 8 or claim 9, it is characterised in that the voltage steps value is not more than 0.05V.
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