CN109039574A - A kind of method and its terminal device reducing frequency deviation - Google Patents
A kind of method and its terminal device reducing frequency deviation Download PDFInfo
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- CN109039574A CN109039574A CN201810953259.6A CN201810953259A CN109039574A CN 109039574 A CN109039574 A CN 109039574A CN 201810953259 A CN201810953259 A CN 201810953259A CN 109039574 A CN109039574 A CN 109039574A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L7/00—Arrangements for synchronising receiver with transmitter
- H04L7/0016—Arrangements for synchronising receiver with transmitter correction of synchronization errors
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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
- H04L7/00—Arrangements for synchronising receiver with transmitter
- H04L7/04—Speed or phase control by synchronisation signals
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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
Abstract
The invention discloses a kind of method, apparatus and its terminal device for reducing frequency deviation, for solving the problems, such as that the method for reducing frequency deviation in the prior art not enough optimizes.The described method includes: the signal source of demodulation terminal device current point in time, the frequency stability of the signal source is less than or equal to preset threshold；Based on the signal source after the demodulation, the frequency deviation of the terminal device current point in time is determined；If the frequency deviation of the terminal device current point in time is not within a preset range, if then the frequency deviation of the terminal device current point in time based on the terminal device current point in time is not within a preset range, frequency deviation and the corresponding compensating parameter of temperature then based on the terminal device current point in time, adjust the clock source frequency of the terminal device；Wherein, the temperature, frequency deviation and compensating parameter of the terminal device constitute mapping relations.
Description
Technical field
The present invention relates to field of communication technology more particularly to a kind of methods and its terminal device for reducing frequency deviation.
Background technique
Terminal device frequently includes following two parts relative to the frequency deviation of network side equipment: a part is due to terminal device
Carrier wave frequency deviation caused by the clock source different from network side equipment service precision；Another part is then since Doppler generates
Frequency deviation.
Since frequency deviation will lead to the signal-to-noise ratio degradation of wireless signal searches, the successful probability of cell searching is reduced, more sternly
Then may cause for weight is unable to normal talking between terminal device.In order to improve this problem, in the prior art, in terminal device
The link of multiple detection calibrations can be passed through in production process, to guarantee that terminal device is at optimum state, met various logical
Believe the otherwise requirements such as agreement.
But since the service life of terminal device is longer, crystal oscillator (Crystal Oscillator, XO) or
Voltage Controlled Crystal Oscillator (Voltage-Controlled Crystal Oscillator, VCXO) drift and shake can all aggravate
The deterioration of frequency deviation, often relied only on after terminal device factory with network side equipment synchronize control frequency stability, and
The control precision of network side equipment is limited, can only compensate in a small range, cannot then compensate more than certain frequency deviation.
Therefore, the frequency deviation for how reducing terminal device and network side equipment is solved there is still a need for further.
Summary of the invention
The embodiment of the present invention provides a kind of method, apparatus and its terminal device for reducing frequency deviation, to solve in the prior art
The problem of method of the frequency deviation of reduction terminal device and network side equipment not enough optimizes.
In order to solve the above-mentioned technical problem, the present invention is implemented as follows: in a first aspect, the embodiment of the invention provides one
The method that kind reduces frequency deviation, comprising:
The signal source of terminal device current point in time is demodulated, the frequency stability of the signal source is less than or equal to default threshold
Value；
Based on the signal source after the demodulation, the frequency deviation of the terminal device current point in time is determined；
If the frequency deviation of the terminal device current point in time is not within a preset range, when current based on the terminal device
Between the frequency deviation and the corresponding compensating parameter of temperature put, adjust the clock source frequency of the terminal device；
Wherein, the temperature, frequency deviation and compensating parameter of the terminal device constitute mapping relations.
Second aspect, the embodiment of the invention provides a kind of devices for reducing frequency deviation, comprising:
Demodulating unit, for demodulating the signal source of terminal device current point in time, the frequency stability of the signal source is small
In or equal to preset threshold；
Determination unit, for determining the frequency deviation of the terminal device current point in time based on the signal source after the demodulation；
Unit is adjusted, if frequency deviation for the terminal device current point in time is not within a preset range, based on described
The corresponding compensating parameter of frequency deviation and temperature of terminal device current point in time, adjusts the clock source frequency of the terminal device；
Wherein, the temperature, frequency deviation and compensating parameter of the terminal device constitute mapping relations.
The third aspect, the embodiment of the invention provides a kind of terminal devices, comprising: memory, processor and is stored in institute
The computer program that can be run on memory and on the processor is stated, when the computer program is executed by the processor
The step of realizing the method such as first aspect.
Fourth aspect, the embodiment of the present invention also provide a kind of readable storage medium storing program for executing, on the computer readable storage medium
The step of being stored with computer program, the method such as first aspect realized when the computer program is executed by processor.
In the embodiment of the present invention, the signal source of terminal device current point in time can be demodulated first, after being then based on demodulation
Signal source, determine the frequency deviation of terminal device current point in time, and in the frequency deviation of the terminal device current point in time not default
When in range, the corresponding compensating parameter of frequency deviation and temperature based on terminal device current point in time adjusts the clock of terminal device
Source frequency, to reduce the frequency deviation of terminal device current point in time.Since the frequency stability of signal source is less than or equal to default threshold
Value, compared with general signal source, precision and stability are all higher, and the accuracy of the frequency deviation determined based on the signal source after demodulation
It is also higher with stability, and the temperature of terminal device, frequency deviation and compensating parameter constitute mapping relations, are based on terminal device in this way
The clock source frequency that the corresponding compensating parameter of the frequency deviation and temperature of current point in time is adjusted also can relatively accurately reduce end
The frequency deviation of end equipment.
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 specific implementation flow diagram of method for reducing frequency deviation provided in an embodiment of the present invention；
Fig. 2 is the frequency deviation of the XO clock source of terminal device and the corresponding relationship curve graph of temperature；
Fig. 3 is the comparison diagram before and after the frequency calibration of terminal device in the prior art；
Fig. 4 is the schematic diagram of internal structure of XO clock source in the embodiment of the present invention；
Fig. 5 is the schematic diagram of the XO clock source in terminal device；
Fig. 6 is the schematic diagram of preset mapping table provided in an embodiment of the present invention；
Fig. 7 is that the method provided in an embodiment of the present invention for reducing frequency deviation applies the flow diagram in actual scene；
Fig. 8 is a kind of structural schematic diagram of device for reducing frequency deviation provided in an embodiment of the present invention；
Fig. 9 is a kind of structural schematic diagram of terminal device provided in an embodiment of the present 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.
The technical solution provided below in conjunction with attached drawing, each embodiment that the present invention will be described in detail.
To solve the problems, such as that the method for reducing frequency deviation in the prior art not enough optimizes, the present invention, which provides, a kind of reduces frequency deviation
Method, the executing subject of this method, can be, but not limited to server etc. can be configured as executing it is provided in an embodiment of the present invention
At least one of this method user terminal.
For ease of description, hereafter executing subject in this way is to be able to carry out for the terminal device of this method, to this
The embodiment of method is introduced.It is appreciated that it is that one kind is illustratively said that the executing subject of this method, which is terminal device,
It is bright, it is not construed as the restriction to this method.
Specifically, the method provided by the invention for reducing frequency deviation includes: the letter firstly, demodulation terminal device current point in time
The frequency stability in number source, the signal source is less than or equal to preset threshold；Then, based on the signal source after demodulation, terminal is determined
The frequency deviation of equipment current point in time；Finally, if the frequency deviation of terminal device current point in time not within a preset range, is based on terminal
The corresponding compensating parameter of frequency deviation and temperature of equipment current point in time, adjusts the clock source frequency of terminal device；Wherein, terminal is set
Standby temperature, frequency deviation and compensating parameter constitutes mapping relations.
In the embodiment of the present invention, the signal source of terminal device current point in time can be demodulated first, after being then based on demodulation
Signal source, determine the frequency deviation of terminal device current point in time, and in the frequency deviation of the terminal device current point in time not default
When in range, the corresponding compensating parameter of frequency deviation and temperature based on terminal device current point in time adjusts the clock of terminal device
Source frequency, to reduce the frequency deviation of terminal device current point in time.Since the frequency stability of signal source is less than or equal to default threshold
Value, compared with general signal source, precision and stability are all higher, and the accuracy of the frequency deviation determined based on the signal source after demodulation
It is also higher with stability, and the temperature of terminal device, frequency deviation and compensating parameter constitute mapping relations, are based on terminal device in this way
The clock source frequency that the corresponding compensating parameter of the frequency deviation and temperature of current point in time is adjusted also can relatively accurately reduce end
The frequency deviation of end equipment.
Implementation below with reference to the specific implementation flow diagram of the method shown in FIG. 1 for reducing frequency deviation, to this method
Journey describes in detail, comprising:
Step 101, the signal source of terminal device current point in time is demodulated, the frequency stability of the signal source is less than or equal to
Preset threshold；
Wherein, preset threshold can be by multiple for filtering out the higher signal source of frequency stability, the preset threshold
To obtain, which can be less than or equal to 2ppm in practical applications for experiment, by taking preset threshold is 2ppm as an example, then
The frequency of signal source can then fluctuate in the range of ± 2ppm on the basis of its original frequency.Frequency stability is less than or waits
In the signal source of preset threshold include global positioning system (Global Positioning System, GPS) signal, WiFi or
Other wireless signals.
As described in the background art, in existing mobile radio system, the base station of network side uses high stability temperature
Compensated crystal oscillator is spent as work clock source, and frequency stability generally reaches 0.05 hundred a ten thousandths (part per
Million, ppm), and terminal device uses crystal oscillator (Crystal Oscillator, XO) or voltage-controlled crystal (oscillator)
Oscillator (Voltage-Controlled Crystal Oscillator, VCXO), frequency stability generally only have 10ppm
Left and right, before terminal device dispatches from the factory by calibration within 5ppm.This causes terminal device receiving what base station equipment was sent
Frequency departure (Frequency Offset) is generated when downlink signal, commonly abbreviated as frequency deviation.It can frequency except generating in this case
Other than partially, terminal device can also generate Doppler shift in the case where high-speed mobile.
In the prior art, after terminal device is synchronous with network side equipment foundation, it can use the downlink of network side equipment
Reference signal carries out Frequency Locking, and the frequency deviation of terminal device is controlled within 0.1ppm.However, working as wireless channel ring
When border is more severe, terminal device needs the search of initial zone for carrying out the long period then to obtain signal-to-noise ratio higher, but long
The phase error that the cell searching of time can make frequency deviation accumulative influences aggravation, makes practical received signal-to-noise ratio decline instead, simultaneously
Since the service life of terminal device is elongated, XO or VCXO drift and shake can also aggravate the deterioration of frequency deviation, and serious conditions are also
It will lead to the cell searching failure of terminal device.
For ease of description, hereafter by the clock source of terminal device be XO clock source for, it will be understood that terminal device when
Zhong Yuanwei XO clock source is a kind of illustrative explanation, should not constitute the limitation to method provided in an embodiment of the present invention.
VCXO clock source is similar with the adjusting method of the frequency of XO clock source, and the embodiment of the present invention is VCXO to the clock source of terminal device
The case where clock source, repeats no more.
In order to reduce the frequency deviation of terminal device, the prior art generallys use following two ways to reduce frequency deviation: the first
Mode carries out frequency calibration using network side equipment, however this mode needs frequency deviation just to can be carried out in a certain range, that is, needs
The signal-to-noise ratio wanted in a certain range just can be synchronous with network side equipment, when frequency deviation has deteriorated into cannot be same with network side
Step, or frequency calibration cannot be carried out to terminal device then under weak signal to reduce frequency deviation；The second way passes through radio frequency school
Quasi- method reduces frequency deviation, and this mode needs to return terminal device into factory and tears machine open, needs to carry out frequency using the equipment of profession
Calibration, process is cumbersome and influences the experience of user.
As shown in Fig. 2, for the frequency deviation of the XO clock source of terminal device and the corresponding relationship curve graph of temperature, in Fig. 2, mark
Knowledge is the corresponding relationship curve graph of frequency deviation and temperature that the curve of " T " is the XO clock source of typical terminal device, is identified as " A "
Curve be actually measured terminal device XO clock source frequency deviation and temperature corresponding relationship curve graph, every curve is corresponding
In a kind of setting of the clock source frequency of XO.Obviously, the frequency deviation of terminal device is within the scope of different temperature and different XO
It can change in clock source frequency range.It is specific then formula f (t)=c3 (t-t0) can be passed through3+c2(t-t0)2+c1(t-
T0)+c0 determines the frequency deviation of XO clock source, wherein f (t) indicates XO clock source frequency deviation, t indicates temperature, and t0 indicates reference temperature
Value, c0, c1, c2, c3 are the intrinsic parameter of XO clock source.
In order to improve the frequency stability of terminal device, i.e. the frequency deviation of reduction terminal device is set in terminal in the prior art
It can be calibrated before standby factory.As shown in figure 3, for the comparison before and after the frequency calibration of terminal device in the prior art
Figure, wherein Fig. 3 (a) is the variation schematic diagram of its frequency deviation within the scope of different temperature before the frequency calibration of terminal device, Fig. 3
It (b) is the variation schematic diagram of its frequency deviation within the scope of different temperature after the frequency calibration of terminal device.It can be with from Fig. 3 (a)
Find out, before the frequency to terminal device is calibrated, actually measured frequency deviation (being identified as the curve of " M ") and target frequency
(being identified as the curve of " G ") partially has a certain distance, and after calibration, i.e., as shown in figure (b), terminal device is actually measured
Frequency deviation and target frequency deviation between gap with regard to very little.
The embodiment of the present invention in order to optimize in the prior art reduce frequency deviation method, introduce frequency, demodulation frequency stability be less than or
Equal to the method for the signal source of preset threshold, and based on the signal source after demodulation, to determine the frequency of terminal device current point in time
Partially, since the frequency stability of signal source is less than or equal to preset threshold, accuracy and stability are also higher, demodulate
The accuracy of the corresponding frequency of signal source and stability are also just relatively high, provide to reduce frequency deviation for terminal device than calibrated
True and stable reference.Further, since frequency, demodulation frequency stability is less than or equal to the signal source of preset threshold for terminal device
For can realize, and user needs not know about this detailed process, therefore reduces the mistake of frequency deviation based on the signal source after demodulation
Journey will not influence the normal use of user.
Step 102, based on the signal source after demodulation, the frequency deviation of terminal device current point in time is determined；
Optionally, based on the signal source after demodulation, the frequency deviation of terminal device current point in time is determined, it can be firstly, being based on
Signal source after demodulation determines the corresponding frequency of signal source；Then, the clock based on signal source corresponding frequency and terminal device
The difference of source frequency determines the frequency deviation of terminal device current point in time.Wherein, the clock source frequency of terminal device can be directly from end
It is acquired in end equipment.
As shown in figure 4, for the schematic diagram of internal structure of XO clock source in the embodiment of the present invention, which mainly includes
The register SBI control of four capacitor C and the frequency stability for controlling this four capacitors.The tune being described below
The frequency for saving the clock source of terminal device is realized by adjusting capacitor shown in Fig. 4.
As shown in figure 5, in Fig. 5, drawing three bases by XO clock source for the schematic diagram of the XO clock source in terminal device
Quasi- clock source: RF CLK1 (reference clock source of radio modem), the RF CLK2 (reference clock of GPS/WiFi antenna
Source) and BB CLK (reference clock source of Base Band Unit).Since reference clock source RF CLK1 and RF CLK2 are from XO clock
Source draw, therefore, at the same temperature, the frequency stability i.e. frequency deviation of reference clock source RF CLK1 and RF CLK2 with
The frequency deviation of the XO clock source of terminal device is directly proportional.The embodiment of the present invention is based on this point, when current by demodulation terminal device
Between the frequency stability put be less than or equal to the signal source (such as GPS signal or WiFi signal) of preset threshold, obtain the signal
The corresponding frequency in source, then the frequency and the obtained signal source of demodulation of the XO clock source based on terminal device current point in time are corresponding
Frequency determines the frequency deviation of terminal device current point in time.
Step 103, if the frequency deviation of terminal device current point in time not within a preset range, when current based on terminal device
Between the frequency deviation and the corresponding compensating parameter of temperature put, adjust the clock source frequency of terminal device.
Wherein, the temperature, frequency deviation and compensating parameter of terminal device constitute mapping relations.As shown in fig. 6, real for the present invention
Apply the mapping relations figure of the temperature of the terminal device that example obtains in advance, frequency deviation and clock source compensating parameter.In Fig. 6, horizontal seat
It is designated as the range of temperature of XO clock source, ordinate is the frequency deviation variation range of XO clock source, every curve difference in Fig. 6
A kind of setting corresponding to clock source compensating parameter.
Optionally, if the frequency deviation of terminal device current point in time not within a preset range, when current based on terminal device
Between the frequency deviation and the corresponding compensating parameter of temperature of terminal device put, adjust the clock source frequency of terminal device, can be firstly, obtaining
Take the temperature of terminal device current point in time；Then, benefit corresponding with the frequency deviation of terminal device current point in time and temperature is obtained
Repay parameter；Finally, adjusting terminal device based on compensating parameter corresponding with the frequency deviation of terminal device current point in time and temperature
Clock source frequency.
By taking the temperature of terminal device current point in time is 10 DEG C as an example, it is assumed that the frequency deviation of terminal device current point in time does not exist
In preset range, then the temperature of terminal device current point in time is obtained first, which can be by built in terminal device
Temperature sensor obtain, then from mapping relations chart shown in fig. 6, obtain and the frequency of the terminal device current point in time
The inclined and corresponding curve of temperature, and the compensating parameter of the corresponding clock source of the curve is obtained, the clock source that finally will acquire
Compensating parameter is written in register shown in Fig. 3, can realize the purpose of the clock source frequency adjusting to terminal device.
Optionally, as shown in Figure 5, due to the frequency stability of the reference clock source RF CLK2 of GPS/WiFi namely frequency
It is partially directly proportional to the frequency deviation of XO clock source of terminal device, then based on frequency deviation, temperature phase with terminal device current point in time
Corresponding clock source inner parameter adjusts the clock source frequency of terminal device, specifically, if terminal device current point in time
Frequency deviation is positive number (i.e. clock source frequency of the corresponding frequency of signal source less than terminal device), then when being based on current with terminal device
Between the frequency deviation and the corresponding compensating parameter of temperature put, increase the frequency of the clock source of terminal device；And if terminal device it is current when
Between the frequency deviation put be negative (i.e. the corresponding frequency of signal source be less than terminal device clock source frequency), then be based on and terminal device
The corresponding compensating parameter of frequency deviation and temperature of current point in time, reduces the frequency of the clock source of terminal device.
Optionally, in order to avoid after the frequency for the clock source for having adjusted terminal device, frequency deviation is not still default
In range, if the embodiment of the present invention the above-mentioned frequency deviation for performing terminal device current point in time not within a preset range, base
After the corresponding compensating parameter of frequency deviation and temperature of terminal device current point in time, the clock source frequency for adjusting terminal device,
It continues to execute: firstly, demodulation terminal device adjusts the signal source after clock source frequency；Then, based on the signal source after demodulation, really
Determine terminal device and adjusts the frequency deviation after clock source frequency；Finally, if the frequency deviation after terminal device adjusting clock source frequency is not pre-
If in range, then adjusting frequency deviation and the corresponding compensating parameter of temperature after clock source frequency based on terminal device, adjusting terminal and set
Standby clock source frequency.And so on, until the frequency deviation that is determined based on the obtained signal source of demodulation within a preset range, then no longer
The step of carrying out the clock source frequency of above-mentioned adjusting terminal device.
Being less than or equal to the signal source of preset threshold below with frequency stability is GPS and clock Source Type is XO clock
For source, describe in detail to the method provided in an embodiment of the present invention for reducing frequency deviation.As shown in fig. 7, implementing for the present invention
The method for the reduction frequency deviation that example provides applies the flow diagram in a kind of actual scene, including following key steps:
Step 701, the inner parameter of the XO clock source based on preset mapping table setting terminal device；
Wherein, preset mapping table is the mapping relations between the temperature, frequency deviation and compensating parameter of terminal device
Table.The specific temperature of available terminal device current point in time and the demand of frequency deviation, for example frequency deviation is in a certain temperature change
Fluctuation in range is smaller, to select the inner parameter of corresponding XO clock source for terminal device, and by the benefit of the XO clock source
Parameter write-in is repaid to control in the register of its frequency stability.
Step 702, the GPS signal of current point in time is demodulated；
Specifically the corresponding frequency of the GPS signal can be determined by demodulating the GPS signal of current point in time.
Step 703, whether within a preset range RF CLK2 frequency deviation is detected；
The base drawn based on the corresponding frequency of GPS signal obtained in step 702 and current point in time by XO clock source
Whether the frequency of quasi- clock source RF CLK2 determines the frequency deviation of RF CLK2, and determine the frequency deviation of the RF CLK2 in preset range
It is interior.If RF CLK2 frequency deviation is within a preset range, show the frequency deviation of terminal device XO clock source also within a preset range, also
It does not need that the frequency of XO clock source is adjusted.And if RF CLK2 frequency deviation is not within a preset range, can be by executing step
Rapid 704 adjust its frequency to adjust the compensating parameter of XO clock source.
Step 704, the inner parameter of XO clock source is adjusted according to preset mapping table；
The temperature of specific available terminal device current point in time, the frequency deviation determined based on the temperature and step 703
And preset mapping table determines the compensating parameter of XO clock source corresponding with the temperature and frequency deviation, and based on determining
The inner parameter of XO clock source is adjusted in the compensating parameter of XO clock source corresponding with the temperature and frequency deviation, to realize
Adjust the purpose of the frequency of XO clock source.
Step 705, it after the inner parameter for adjusting XO clock source, demodulates GPS signal and whether detects RF CLK2 frequency deviation
Within a preset range；
After the inner parameter for adjusting XO clock source, continue to demodulate GPS signal whether to detect RF CLK2 frequency deviation pre-
If in range, if RF CLK2 frequency deviation is within a preset range, thening follow the steps 706, and if RF CLK2 frequency deviation not in preset range
It is interior, then step 703 is continued to execute, until the RF CLK2 frequency deviation obtained based on the GPS signal after demodulation is within a preset range
Only.
Step 706, the inner parameter information write-in of XO clock source finally determining from preset mapping table is posted
Storage.
Specifically, the RF CLK2 frequency that the satisfaction that above-mentioned steps determine is obtained based on the GPS signal after demodulation can be obtained first
The inner parameter information of corresponding XO clock source within a preset range partially, then by the inside of the XO clock source finally determined
Register is written in parameter information.
In the embodiment of the present invention, the signal source of terminal device current point in time can be demodulated first, after being then based on demodulation
Signal source, determine the frequency deviation of terminal device current point in time, and in the frequency deviation of the terminal device current point in time not default
When in range, the corresponding compensating parameter of frequency deviation and temperature based on terminal device current point in time adjusts the clock of terminal device
Source frequency, to reduce the frequency deviation of terminal device current point in time.Since the frequency stability of signal source is less than or equal to default threshold
Value, compared with general signal source, precision and stability are all higher, and the accuracy of the frequency deviation determined based on the signal source after demodulation
It is also higher with stability, and the temperature of terminal device, frequency deviation and compensating parameter constitute mapping relations, are based on terminal device in this way
The clock source frequency that the corresponding compensating parameter of the frequency deviation and temperature of current point in time is adjusted also can relatively accurately reduce end
The frequency deviation of end equipment.
Referring to Fig. 8, for the structural schematic diagram of the device 800 provided in an embodiment of the present invention for reducing frequency deviation, such as Fig. 8 institute
Show, including demodulating unit 801, determination unit 802 and adjusting unit 803, in which:
Demodulating unit 801, for demodulating the signal source of terminal device current point in time, the frequency stability of the signal source
Less than or equal to preset threshold；
Determination unit 802, for determining the frequency of the terminal device current point in time based on the signal source after the demodulation
Partially；
Unit 803 is adjusted, if frequency deviation for the terminal device current point in time not within a preset range, is based on institute
The frequency deviation and the corresponding compensating parameter of temperature for stating terminal device current point in time, adjust the clock source frequency of the terminal device；
Wherein, the temperature, frequency deviation and compensating parameter of the terminal device constitute mapping relations.
Optionally, in one embodiment, the determination unit 802, is used for:
Based on the signal source after the demodulation, the corresponding frequency of the signal source is determined；
The difference of clock source frequency based on the corresponding frequency of the signal source and the terminal device determines that the terminal is set
The frequency deviation of standby current point in time.
Optionally, in one embodiment, the adjusting unit 803, is used for:
Obtain the temperature of the terminal device current point in time；
Obtain compensating parameter corresponding with the frequency deviation of the terminal device current point in time and temperature；
Based on compensating parameter corresponding with the frequency deviation of the terminal device current point in time and temperature, adjusts the terminal and set
Standby clock source frequency.
Optionally, in one embodiment, the adjusting unit 803, is used for:
If the frequency deviation of the terminal device current point in time be positive number, based on the terminal device current point in time
Frequency deviation and the corresponding compensating parameter of temperature, increase the frequency of the clock source of the terminal device；
If the frequency deviation of the terminal device current point in time be negative, based on the terminal device current point in time
Frequency deviation and the corresponding compensating parameter of temperature, reduce the frequency of the clock source of the terminal device.
Optionally, in one embodiment, the terminal device further include:
First demodulating unit 804, for demodulating the signal source after the terminal device adjusts clock source frequency；
First determination unit 805, for determining that the terminal device adjusts clock source based on the signal source after the demodulation
Frequency deviation after frequency；
First adjusts unit 806, if adjusting the frequency deviation after clock source frequency for the terminal device not in preset range
Interior, then frequency deviation and the corresponding compensating parameter of temperature based on the terminal device current point in time adjust the terminal device
Clock source frequency.
The device 800 provided in an embodiment of the present invention for reducing frequency deviation can be realized terminal in the embodiment of the method for FIG. 1 to FIG. 7
Each process that equipment is realized, to avoid repeating, which is not described herein again.
A kind of hardware structural diagram of Fig. 9 terminal device 900 of each embodiment to realize the present invention,
The terminal device 900 includes but is not limited to: radio frequency unit 901, network module 902, audio output unit 903, defeated
Enter unit 904, sensor 905, display unit 906, user input unit 907, interface unit 908, memory 909, processor
The components such as 910 and power supply 911.It will be understood by those skilled in the art that terminal device structure shown in Fig. 9 is not constituted
Restriction to terminal device, terminal device may include than illustrating more or fewer components, perhaps combine certain components or
Different component layouts.In embodiments of the present invention, terminal device include but is not limited to mobile phone, tablet computer, laptop,
Palm PC, car-mounted terminal, wearable device and pedometer etc..
Wherein, processor 910, for demodulating the signal source of terminal device current point in time, the frequency of the signal source is steady
Fixed degree is less than or equal to preset threshold；Based on the signal source after the demodulation, the frequency of the terminal device current point in time is determined
Partially；If the frequency deviation of the terminal device current point in time within a preset range, is not based on the terminal device current point in time
Frequency deviation and the corresponding compensating parameter of temperature, adjust the clock source frequency of the terminal device；Wherein, the temperature of the terminal device
Degree, frequency deviation and compensating parameter constitute mapping relations.
In the embodiment of the present invention, the signal source of terminal device current point in time can be demodulated first, after being then based on demodulation
Signal source, determine the frequency deviation of terminal device current point in time, and in the frequency deviation of the terminal device current point in time not default
When in range, the corresponding compensating parameter of frequency deviation and temperature based on terminal device current point in time adjusts the clock of terminal device
Source frequency, to reduce the frequency deviation of terminal device current point in time.Since the frequency stability of signal source is less than or equal to default threshold
Value, compared with general signal source, precision and stability are all higher, and the accuracy of the frequency deviation determined based on the signal source after demodulation
It is also higher with stability, and the temperature of terminal device, frequency deviation and compensating parameter constitute mapping relations, are based on terminal device in this way
The clock source frequency that the corresponding compensating parameter of the frequency deviation and temperature of current point in time is adjusted also can relatively accurately reduce end
The frequency deviation of end equipment.
It should be understood that the embodiment of the present invention in, radio frequency unit 901 can be used for receiving and sending messages or communication process in, signal
Send and receive, specifically, by from base station downlink data receive after, to processor 910 handle；In addition, by uplink
Data are sent to base station.In general, radio frequency unit 901 includes but is not limited to antenna, at least one amplifier, transceiver, coupling
Device, low-noise amplifier, duplexer etc..In addition, radio frequency unit 901 can also by wireless communication system and network and other set
Standby communication.
Terminal device provides wireless broadband internet by network module 902 for user and accesses, and such as user is helped to receive
It sends e-mails, browse webpage and access streaming video etc..
Audio output unit 903 can be received by radio frequency unit 901 or network module 902 or in memory 909
The audio data of storage is converted into audio signal and exports to be sound.Moreover, audio output unit 903 can also provide and end
The relevant audio output of specific function that end equipment 900 executes is (for example, call signal receives sound, message sink sound etc.
Deng).Audio output unit 903 includes loudspeaker, buzzer and receiver etc..
Input unit 904 is for receiving audio or video signal.Input unit 904 may include graphics processor
(Graphics Processing Unit, GPU) 9041 and microphone 9042, graphics processor 9041 is in video acquisition mode
Or the image data of the static images or video obtained in image capture mode by image capture apparatus (such as camera) carries out
Reason.Treated, and picture frame may be displayed on display unit 906.Through graphics processor 9041, treated that picture frame can be deposited
Storage is sent in memory 909 (or other storage mediums) or via radio frequency unit 901 or network module 902.Mike
Wind 9042 can receive sound, and can be audio data by such acoustic processing.Treated audio data can be
The format output that mobile communication base station can be sent to via radio frequency unit 901 is converted in the case where telephone calling model.
Terminal device 900 further includes at least one sensor 905, such as optical sensor, motion sensor and other biographies
Sensor.Specifically, optical sensor includes ambient light sensor and proximity sensor, wherein ambient light sensor can be according to environment
The light and shade of light adjusts the brightness of display panel 9061, and proximity sensor can close when terminal device 900 is moved in one's ear
Display panel 9061 and/or backlight.As a kind of motion sensor, accelerometer sensor can detect in all directions (general
For three axis) size of acceleration, it can detect that size and the direction of gravity when static, can be used to identify terminal device posture (ratio
Such as horizontal/vertical screen switching, dependent game, magnetometer pose calibrating), Vibration identification correlation function (such as pedometer, tap)；It passes
Sensor 905 can also include fingerprint sensor, pressure sensor, iris sensor, molecule sensor, gyroscope, barometer, wet
Meter, thermometer, infrared sensor etc. are spent, details are not described herein.
Display unit 906 is for showing information input by user or being supplied to the information of user.Display unit 906 can wrap
Display panel 9061 is included, liquid crystal display (Liquid Crystal Display, LCD), Organic Light Emitting Diode can be used
Forms such as (Organic Light-Emitting Diode, OLED) configure display panel 9061.
User input unit 907 can be used for receiving the number or character information of input, and generate the use with terminal device
Family setting and the related key signals input of function control.Specifically, user input unit 907 include touch panel 9071 and
Other input equipments 9072.Touch panel 9071, also referred to as touch screen collect the touch operation of user on it or nearby
(for example user uses any suitable objects or attachment such as finger, stylus on touch panel 9071 or in touch panel 9071
Neighbouring operation).Touch panel 9071 may include both touch detecting apparatus and touch controller.Wherein, touch detection
Device detects the touch orientation of user, and detects touch operation bring signal, transmits a signal to touch controller；Touch control
Device processed receives touch information from touch detecting apparatus, and is converted into contact coordinate, then gives processor 910, receiving area
It manages the order that device 910 is sent and is executed.Furthermore, it is possible to more using resistance-type, condenser type, infrared ray and surface acoustic wave etc.
Seed type realizes touch panel 9071.In addition to touch panel 9071, user input unit 907 can also include other input equipments
9072.Specifically, other input equipments 9072 can include but is not limited to physical keyboard, function key (such as volume control button,
Switch key etc.), trace ball, mouse, operating stick, details are not described herein.
Further, touch panel 9071 can be covered on display panel 9061, when touch panel 9071 is detected at it
On or near touch operation after, send processor 910 to determine the type of touch event, be followed by subsequent processing device 910 according to touching
The type for touching event provides corresponding visual output on display panel 9061.Although in Fig. 9, touch panel 9071 and display
Panel 9061 is the function that outputs and inputs of realizing terminal device as two independent components, but in some embodiments
In, can be integrated by touch panel 9071 and display panel 9061 and realize the function that outputs and inputs of terminal device, it is specific this
Place is without limitation.
Interface unit 908 is the interface that external device (ED) is connect with terminal device 900.For example, external device (ED) may include having
Line or wireless head-band earphone port, external power supply (or battery charger) port, wired or wireless data port, storage card end
Mouth, port, the port audio input/output (I/O), video i/o port, earphone end for connecting the device with identification module
Mouthful etc..Interface unit 908 can be used for receiving the input (for example, data information, electric power etc.) from external device (ED) and
By one or more elements that the input received is transferred in terminal device 900 or can be used in 900 He of terminal device
Data are transmitted between external device (ED).
Memory 909 can be used for storing software program and various data.Memory 909 can mainly include storing program area
The storage data area and, wherein storing program area can (such as the sound of application program needed for storage program area, at least one function
Sound playing function, image player function etc.) etc.；Storage data area can store according to mobile phone use created data (such as
Audio data, phone directory etc.) etc..In addition, memory 909 may include high-speed random access memory, it can also include non-easy
The property lost memory, a for example, at least disk memory, flush memory device or other volatile solid-state parts.
Processor 910 is the control centre of terminal device, utilizes each of various interfaces and the entire terminal device of connection
A part by running or execute the software program and/or module that are stored in memory 909, and calls and is stored in storage
Data in device 909 execute the various functions and processing data of terminal device, to carry out integral monitoring to terminal device.Place
Managing device 910 may include one or more processing units；Preferably, processor 910 can integrate application processor and modulatedemodulate is mediated
Manage device, wherein the main processing operation system of application processor, user interface and application program etc., modem processor is main
Processing wireless communication.It is understood that above-mentioned modem processor can not also be integrated into processor 910.
Terminal device 900 can also include the power supply 911 (such as battery) powered to all parts, it is preferred that power supply 911
Can be logically contiguous by power-supply management system and processor 910, to realize management charging by power-supply management system, put
The functions such as electricity and power managed.
In addition, terminal device 900 includes some unshowned functional modules, details are not described herein.
Preferably, the embodiment of the present invention also provides a kind of terminal device, including processor 910, and memory 909 is stored in
On memory 909 and the computer program that can run on the processor 910, the computer program are executed by processor 910
Each process of the embodiment of the method for the above-mentioned reduction frequency deviation of Shi Shixian, and identical technical effect can be reached, to avoid repeating, this
In repeat no more.
The embodiment of the present invention also provides a kind of computer readable storage medium, and meter is stored on computer readable storage medium
Calculation machine program, the computer program realize each process of the embodiment of the method for above-mentioned reduction frequency deviation when being executed by processor, and
Identical technical effect can be reached, to avoid repeating, which is not described herein again.Wherein, the computer readable storage medium, such as
Read-only memory (Read-Only Memory, abbreviation ROM), random access memory (Random Access Memory, abbreviation
RAM), magnetic or disk etc..
It should be noted that, in this document, the terms "include", "comprise" or its any other variant are intended to non-row
His property includes, so that the process, method, article or the device that include a series of elements not only include those elements, and
And further include other elements that are not explicitly listed, or further include for this process, method, article or device institute it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including being somebody's turn to do
There is also other identical elements in the process, method of element, article or device.
Through the above description of the embodiments, those skilled in the art can be understood that above-described embodiment side
Method can be realized by means of software and necessary general hardware platform, naturally it is also possible to by hardware, but in many cases
The former is more preferably embodiment.Based on this understanding, technical solution of the present invention substantially in other words does the prior art
The part contributed out can be embodied in the form of software products, which is stored in a storage medium
In (such as ROM/RAM, magnetic disk, CD), including some instructions are used so that a terminal (can be mobile phone, computer, service
Device, air conditioner or network equipment etc.) execute method described in each embodiment of the present invention.
The embodiment of the present invention is described with above attached drawing, but the invention is not limited to above-mentioned specific
Embodiment, the above mentioned embodiment is only schematical, rather than restrictive, those skilled in the art
Under the inspiration of the present invention, without breaking away from the scope protected by the purposes and claims of the present invention, it can also make very much
Form belongs within protection of the invention.
Claims (10)
1. a kind of method for reducing frequency deviation characterized by comprising
The signal source of terminal device current point in time is demodulated, the frequency stability of the signal source is less than or equal to preset threshold；
Based on the signal source after the demodulation, the frequency deviation of the terminal device current point in time is determined；
If the frequency deviation of the terminal device current point in time within a preset range, is not based on the terminal device current point in time
Frequency deviation and the corresponding compensating parameter of temperature, adjust the clock source frequency of the terminal device；
Wherein, the temperature, frequency deviation and compensating parameter of the terminal device constitute mapping relations.
2. the method as described in claim 1, which is characterized in that based on the signal source after the demodulation, determine that the terminal is set
The frequency deviation of standby current point in time, comprising:
Based on the signal source after the demodulation, the corresponding frequency of the signal source is determined；
The difference of clock source frequency based on the corresponding frequency of the signal source and the terminal device determines that the terminal device is worked as
The frequency deviation at preceding time point.
3. method according to claim 2, which is characterized in that if the frequency deviation of the terminal device current point in time is not default
In range, then frequency deviation and the corresponding compensating parameter of temperature based on the terminal device current point in time adjust the terminal and set
Standby clock source frequency, comprising:
Obtain the temperature of the terminal device current point in time；
Obtain compensating parameter corresponding with the frequency deviation of the terminal device current point in time and temperature；
Based on compensating parameter corresponding with the frequency deviation of the terminal device current point in time and temperature, the terminal device is adjusted
Clock source frequency.
4. method as claimed in claim 3, which is characterized in that based on the frequency deviation and temperature with the terminal device current point in time
Corresponding compensating parameter is spent, the clock source frequency of the terminal device is adjusted, comprising:
If the frequency deviation of the terminal device current point in time is positive number, based on the frequency deviation with the terminal device current point in time
Compensating parameter corresponding with temperature, increases the frequency of the clock source of the terminal device；
If the frequency deviation of the terminal device current point in time is negative, based on the frequency deviation with the terminal device current point in time
Compensating parameter corresponding with temperature, reduces the frequency of the clock source of the terminal device.
5. the method as described in any in Claims 1 to 4, which is characterized in that if the frequency of the terminal device current point in time
Partially not within a preset range, then frequency deviation and the corresponding compensating parameter of temperature based on the terminal device current point in time are adjusted
After the clock source frequency of the terminal device, the method also includes:
It demodulates the terminal device and adjusts the signal source after clock source frequency；
Based on the signal source after the demodulation, determine that the terminal device adjusts the frequency deviation after clock source frequency；
If the frequency deviation after the terminal device adjusting clock source frequency within a preset range, it is current not to be based on the terminal device
The corresponding compensating parameter of frequency deviation and temperature at time point, adjusts the clock source frequency of the terminal device.
6. a kind of device for reducing frequency deviation characterized by comprising
Demodulating unit, for demodulating the signal source of terminal device current point in time, the frequency stability of the signal source be less than or
Equal to preset threshold；
Determination unit, for determining the frequency deviation of the terminal device current point in time based on the signal source after the demodulation；
Unit is adjusted, if frequency deviation for the terminal device current point in time not within a preset range, is based on the terminal
The corresponding compensating parameter of frequency deviation and temperature of equipment current point in time, adjusts the clock source frequency of the terminal device；
Wherein, the temperature, frequency deviation and compensating parameter of the terminal device constitute mapping relations.
7. terminal device as claimed in claim 6, which is characterized in that the determination unit is used for:
Based on the signal source after the demodulation, the corresponding frequency of the signal source is determined；
The difference of clock source frequency based on the corresponding frequency of the signal source and the terminal device determines that the terminal device is worked as
The frequency deviation at preceding time point.
8. terminal device as claimed in claim 7, which is characterized in that the adjusting unit is used for:
Obtain the temperature of the terminal device current point in time；
Obtain compensating parameter corresponding with the frequency deviation of the terminal device current point in time and temperature；
Based on compensating parameter corresponding with the frequency deviation of the terminal device current point in time and temperature, the terminal device is adjusted
Clock source frequency.
9. terminal device as claimed in claim 8, which is characterized in that the adjusting unit is used for:
If the frequency deviation of the terminal device current point in time is positive number, based on the frequency deviation with the terminal device current point in time
Compensating parameter corresponding with temperature, increases the frequency of the clock source of the terminal device；
If the frequency deviation of the terminal device current point in time is negative, based on the frequency deviation with the terminal device current point in time
Compensating parameter corresponding with temperature, reduces the frequency of the clock source of the terminal device.
10. the terminal device as described in any in claim 6~9, which is characterized in that the terminal device further include:
First demodulating unit, for demodulating the signal source after the terminal device adjusts clock source frequency；
First determination unit, after based on the signal source after the demodulation, determining that the terminal device adjusts clock source frequency
Frequency deviation；
First adjusts unit, if adjusting the frequency deviation after clock source frequency for the terminal device not within a preset range, base
In the frequency deviation and the corresponding compensating parameter of temperature of the terminal device current point in time, the clock source frequency of the terminal device is adjusted
Rate.
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