CN108092675A - A kind of frequency compensation method, mobile terminal and storage device - Google Patents
A kind of frequency compensation method, mobile terminal and storage device Download PDFInfo
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- CN108092675A CN108092675A CN201711039738.9A CN201711039738A CN108092675A CN 108092675 A CN108092675 A CN 108092675A CN 201711039738 A CN201711039738 A CN 201711039738A CN 108092675 A CN108092675 A CN 108092675A
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- frequency
- mobile terminal
- translational speed
- doppler
- oscillation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/005—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/50—Circuits using different frequencies for the two directions of communication
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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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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Present applicant proposes a kind of frequency compensation method, mobile terminal and storage device.Compensation method includes：The translational speed of acquisition for mobile terminal itself；Mobile terminal access base station, and obtain the communication carrier frequency of base station；Mobile terminal calculates to obtain Doppler frequency according to translational speed and communication carrier frequency；Mobile terminal carries out frequency compensation according to the frequency of oscillation and Doppler frequency to prestore to receiving and transmitting signal.Doppler effect during mobile terminal high-speed mobile communications can be solved the problems, such as using the above method.
Description
Technical field
This application involves a kind of frequency compensation field, more particularly to a kind of frequency compensation method, mobile terminal and deposit
Store up equipment.
Background technology
With the development of high-speed railway, train speed is higher and higher, with mobile communication due to Doppler on bullet train
The influence of effect can make mobile communication hydraulic performance decline that can even interrupt communication.Traditional reception and transmitting local oscillating frequency are
It is directly controlled according to the channel that receive and emit by mobile phone terminal processor, is received and dispatched when can meet mobile phone terminal static state
The demand of signal channel.But when can not meet mobile phone terminal high-speed mobile receiving and transmitting signal channel demand.
The terminal of high-speed mobile can make the signal after receives frequency and local oscillating frequency mixing inclined due to Doppler effect
From standard frequency, so as to error code, error code occur, not receive signal completely even, mobile phone terminal communication quality is made to decline even
Interrupt communication.
The content of the invention
The application provides a kind of frequency compensation method, mobile terminal and storage device, is moved at a high speed with solving mobile terminal
Doppler effect problem during dynamic communication.
In order to solve the above technical problems, the application provides a kind of frequency compensation method of mobile terminal, frequency compensation method
Including：The translational speed of acquisition for mobile terminal itself；Mobile terminal access base station, and obtain the communication carrier frequency of base station；It moves
Dynamic terminal calculates to obtain Doppler frequency according to translational speed and communication carrier frequency；Mobile terminal according to the frequency of oscillation that prestores and
Doppler frequency carries out frequency compensation to receiving and transmitting signal.
In order to solve the above technical problems, the application provides a kind of mobile terminal, mobile terminal includes the memory of coupling, place
Manage device and frequency mixer.Memory is used for：Preserve frequency of oscillation.Processor is used for：Obtain the translational speed of mobile terminal；In movement
After base station access by terminal, the communication carrier frequency of base station is obtained；According to translational speed and communication carrier frequency, Doppler's frequency is calculated to obtain
Rate.Frequency mixer is used for：According to the frequency of oscillation and Doppler frequency to prestore, frequency compensation is carried out to receiving and transmitting signal.
In order to solve the above technical problems, the application also provides a kind of storage device, storage device is used to store program data,
Storage data can be performed to realize above-mentioned method.
In the application, mobile terminal first obtains the translational speed of itself, after mobile terminal access base station, then obtains base station
Communication carrier frequency；Mobile terminal, including itself translational speed and communication carrier frequency, is calculated more according to the data of acquisition
General Le frequency；Mobile terminal is further according to the frequency of oscillation that prestores and the Doppler frequency being calculated, to receiving and transmitting signal into line frequency
Rate compensates so that mobile terminal can solve the problems, such as Doppler effect in the environment of high-speed mobile, to reach normal communication
Effect.
Description of the drawings
Fig. 1 is the flow diagram of one embodiment of frequency compensation method of the application mobile terminal；
Fig. 2 is the flow diagram of another embodiment of frequency compensation method of the application mobile terminal；
Fig. 3 is that the Doppler effect of the application mobile terminal receives local oscillating frequency control block diagram；
Fig. 4 is the Doppler effect transmitting local oscillating frequency control block diagram of the application mobile terminal；
Fig. 5 is the structure diagram of one embodiment of the application mobile terminal.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present application, the technical solution in the embodiment of the present application is carried out clear, complete
Site preparation describes.It is understood that specific embodiment described herein is only used for explaining the application rather than the limit to the application
It is fixed.It also should be noted that it illustrates only for ease of description, in attached drawing and the relevant part of the application and not all knot
Structure.Based on the embodiment in the application, those of ordinary skill in the art are obtained without creative efforts
Every other embodiment, shall fall in the protection scope of this application.
Referring to Fig. 1, Fig. 1 is the flow diagram of one embodiment of frequency compensation method of the application mobile terminal, the frequency
Rate compensation method comprises the following steps：
S101：The translational speed of acquisition for mobile terminal itself.
In this step, the translational speed of acquisition for mobile terminal itself, the base which is accessed with mobile terminal
It stands as the relative velocity of object of reference.There are many modes for obtaining translational speed, such as：Serving BS obtains range estimation parameter,
The range estimation parameter is used to estimate the distance that mobile terminal moves in serving BS region；Serving BS according to acquisition away from
It is obtained from estimation parameter with a distance from mobile terminal moves in serving BS region；Serving BS is using mobile terminal in service base
It stands distance and the mobile terminal residence time in serving BS region moved in region, obtains mobile terminal in serving BS area
Translational speed in domain；Mobile terminal obtains the translational speed that serving BS is calculated.
S102：Mobile terminal access base station, and obtain the communication carrier frequency of base station.
In this step, when mobile terminal enters the coverage of serving BS, mobile terminal is connected with serving BS,
The information of base station can be obtained or send information.The communication carrier frequency of acquisition for mobile terminal access base station.
S103：Mobile terminal calculates to obtain Doppler frequency according to translational speed and communication carrier frequency.
In this step, mobile terminal is calculated according to itself translational speed and the communication carrier frequency of institute's access base station
To Doppler frequency.Doppler frequency is mainly used for the Doppler effect that solution mobile terminal is generated in high-speed mobile communications and asks
Topic.Doppler effect is specifically expressed as：When mobile terminal to institute's access base station quickly close to when, the load of mobile terminal sending and receiving signal
Ripple wavelength becomes smaller, and sending and receiving frequency becomes higher；When mobile terminal is rapidly directed away from institute's access base station, the load of mobile terminal sending and receiving signal
Ripple wavelength becomes larger, and sending and receiving frequencies go lower.
S104：Mobile terminal carries out frequency compensation according to the frequency of oscillation and Doppler frequency to prestore to receiving and transmitting signal.
In this step, Doppler frequency is calculated by above-mentioned steps, and the frequency of oscillation to prestore is local oscillations frequency
Rate.The local oscillating frequency is directly controlled according to the channel to be received by mobile terminal processor, which has been subjected to
Instrument and equipment has carried out calibration and the store-memory frequency control parameters of each channel, so the local oscillating frequency is in static state
FREQUENCY CONTROL under state, when meeting mobile terminal static state the needs of sending and receiving frequency.
The present embodiment frequency compensation method can be applied to mobile terminal so that mobile terminal first obtains the mobile speed of itself
It spends, after mobile terminal access base station, then obtains the communication carrier frequency of base station；Mobile terminal according to the data of acquisition, including from
Body translational speed and communication carrier frequency, are calculated Doppler frequency；Mobile terminal is further according to the frequency of oscillation and meter to prestore
Obtained Doppler frequency carries out frequency compensation so that mobile terminal can be in the environment of high-speed mobile to receiving and transmitting signal
Doppler effect is solved the problems, such as, to achieve the effect that normal communication.
Referring to Fig. 2, Fig. 2 is the flow diagram of another embodiment of frequency compensation method of the application mobile terminal, it should
Frequency compensation method comprises the following steps：
S201：The translational speed of acquisition for mobile terminal itself.
In this step, the movement velocity of acquisition for mobile terminal itself.Mobile terminal is by movement velocity in institute's access base station
Component on direction is as translational speed.By defined above, which also characterizes mobile terminal compared with accessed base
The direction of motion stood.When mobile terminal is close to institute's access base station, translational speed is positive number；When mobile terminal principle accesses base
When standing, translational speed is negative.In the present embodiment, the movement velocity of mobile terminal is greater than or equal to 150 kilometers/hour.I.e.
Mobile terminal is under the speed higher than 150 kilometers/hour, usually under high ferro environment, carries out frequency compensation.
S202：Mobile terminal access base station, and obtain the communication carrier frequency of base station.
Mobile terminal enters the coverage of serving BS, and accesses the serving BS, obtains the communication carrier of the base station
Frequency.For example, the value of the communication carrier frequency of the base station obtained is 2GHz.
S203：Mobile terminal calculates to obtain Doppler frequency according to translational speed and communication carrier frequency.
In this step, mobile terminal is based on calculation formula, and Doppler is calculated to obtain according to translational speed and communication carrier frequency
Frequency, calculation formula are：
fd=(fc×v)/c
Wherein, fdFor the Doppler frequency, fcFor the communication carrier frequency, v is the translational speed, and c is the light velocity.
Above-mentioned communication carrier frequency value is 2GHz；Light velocity value is 3.0 × 108m/s.By determining for above-mentioned translational speed
Justice, Doppler frequency are also divided into positive and negative.When mobile terminal is at a high speed close to institute's access base station, Doppler frequency is positive number；Work as shifting
For dynamic terminal high-speed away from institute's access base station, Doppler frequency is negative.
S204：Mobile terminal carries out frequency compensation according to the frequency of oscillation and Doppler frequency to prestore to receiving and transmitting signal.
In this step, mobile terminal chooses frequency of oscillation corresponding with present communications channel；Mobile terminal is selected by
The frequency of oscillation and Doppler frequency taken carries out frequency compensation to receiving and transmitting signal.Mobile terminal is prestored corresponding to multiple communications
Multiple frequencies of oscillation of channel.
Based on the embodiment of said frequencies compensation method, the Doppler effect of mobile terminal receives local oscillating frequency control
It is as follows：Signal is received after low-noise amplifier amplified signal, receives signal frequency by frequency mixer with receiving local oscillations
Frequency is mixed, and is received signal and is demodulated using demodulator, is received after reverting to low-frequency digital signal by mobile terminal processor.On
It is common by mobile terminal selection frequency of oscillation corresponding with present communications channel and Doppler frequency to state reception local oscillating frequency
Control.Detailed process is referring to Fig. 3, the Doppler effect that Fig. 3 is mobile terminal receives local oscillating frequency control block diagram.
The Doppler effect transmitting local oscillating frequency control of mobile terminal is as follows：Mobile terminal processor sends out transmitting
Signal, transmitting signal pass through modulators modulate to high-frequency digital signal；Emit signal and pass through frequency mixer and transmitting local oscillations frequency
Rate is mixed, using output transmitting signal after power amplifier amplified signal.Above-mentioned transmitting local oscillating frequency is by mobile terminal
Choose frequency of oscillation corresponding with present communications channel and Doppler frequency co- controlling.Detailed process is referring to Fig. 4, Fig. 4 is
The Doppler effect transmitting local oscillating frequency control block diagram of mobile terminal.
The present embodiment frequency compensation method can be applied to mobile terminal so that mobile terminal first obtains the movement speed of itself
Degree, translational speed is obtained by component of the movement velocity on institute's access base station direction；After mobile terminal access base station, then obtain
The communication carrier frequency of base station；Mobile terminal according to the data of acquisition, including itself translational speed, base station communication carrier frequency and
Doppler frequency is calculated in the light velocity；Mobile terminal chooses frequency of oscillation corresponding with present communications channel again, according to the vibration
Frequency and the Doppler frequency being calculated carry out frequency compensation to receiving and transmitting signal so that mobile terminal is in the environment of high-speed mobile
In can solve the problems, such as Doppler effect, to achieve the effect that normal communication.
Present invention also provides a kind of mobile terminal 100, referring to Fig. 5, Fig. 5 is one embodiment of the application mobile terminal
Structure diagram.The mobile terminal 100 includes memory 11, processor 12 and the frequency mixer 13 of coupling.Memory 11 is used to protect
Deposit frequency of oscillation；Processor 12 is used to obtain the translational speed of mobile terminal, after 100 access base station of mobile terminal, obtains institute
The communication carrier frequency of access base station, according to translational speed and communication carrier frequency, is calculated Doppler frequency；Frequency mixer 13
For according to the frequency of oscillation and Doppler frequency to prestore, frequency compensation to be carried out to receiving and transmitting signal.
Processor 12 is further used for calculating Doppler frequency, is embodied in：According to translational speed and communication carrier frequency
Rate calculates to obtain Doppler frequency, and calculation formula is：
fd=(fc×v)/c
Wherein, fdFor the Doppler frequency, fcFor the communication carrier frequency, v is the translational speed, and c is the light velocity.
The communication carrier frequency that processor 12 obtains mobile terminal institute access base station is 2GHz, and it is 3.0 × 10 to call light velocity numerical value8m/s。
After Doppler frequency is calculated in processor 12 so that Doppler frequency frequency of oscillation corresponding with present communications channel is to local
Frequency of oscillation is controlled.
Multiple frequencies of oscillation corresponding to multiple communication channels are preserved in mobile terminal 100 in memory 11；Processor
12 are further used for choosing frequency of oscillation corresponding with present communications channel；Frequency mixer 13 is further used for shake selected by
Frequency and Doppler frequency are swung, frequency compensation is carried out to receiving and transmitting signal.
Mobile terminal 100 further includes modulator 14, power amplifier 15, and demodulator 16 and low noise send out device 17 big.Modulation
Device 14 is used to that signal modulation will to be emitted to high-frequency digital signal；Power amplifier 15 is used to export high-power transmitting signal；Demodulation
Device 16 is used to receiving signal demodulation reverting back low-frequency digital signal；Low-noise amplifier 17 receives the same of signal for amplifying
When, influence of noise is reduced, to improve the signal-to-noise ratio for receiving signal.
The present embodiment mobile terminal 100 first passes through processor 12 and obtains the translational speed of itself, and mobile terminal 100 accesses base
After standing, then obtain the communication carrier frequency of base station；Processor 12 is carried according to the data of acquisition including itself translational speed and communication
Doppler frequency is calculated in wave frequency rate；Multiple frequencies of oscillation corresponding to multiple communication channels are preserved in memory 11；Place
It manages device 12 and chooses frequency of oscillation corresponding with present communications channel；Frequency mixer 13 is further according to the frequency of oscillation to prestore and is calculated
Doppler frequency, to receiving and transmitting signal carry out frequency compensation so that mobile terminal 100 can solve in the environment of high-speed mobile
Doppler effect problem, to achieve the effect that normal communication.
The application also proposed a kind of storage device, and for storing program data, storage data can be held the storage device
Row is to realize the embodiment of above-mentioned display method.
The foregoing is merely presently filed embodiments, not thereby limit the scope of the claims of the application, every to utilize this
It is relevant to be directly or indirectly used in other for the equivalent structure or equivalent flow shift that application specification and accompanying drawing content are made
Technical field is similarly included in the scope of patent protection of the application.
Claims (10)
1. a kind of frequency compensation method of mobile terminal, which is characterized in that the compensation method includes：
The acquisition for mobile terminal translational speed of itself；
The mobile terminal access base station, and obtain the communication carrier frequency of the base station；
The mobile terminal calculates to obtain Doppler frequency according to the translational speed and the communication carrier frequency；
The mobile terminal carries out frequency compensation according to the frequency of oscillation and the Doppler frequency to prestore to receiving and transmitting signal.
2. frequency compensation method according to claim 1, which is characterized in that the mobile terminal is according to the translational speed
With the communication carrier frequency, Doppler frequency is calculated to obtain, including：
The mobile terminal is based on calculation formula, and Doppler's frequency is calculated to obtain according to the translational speed and the communication carrier frequency
Rate；The calculation formula is：
fd=(fc×v)/c
Wherein, fdFor the Doppler frequency, fcFor the communication carrier frequency, v is the translational speed, and c is the light velocity.
3. frequency compensation method according to claim 1, which is characterized in that the mobile terminal is prestored corresponding to multiple
Multiple frequencies of oscillation of communication channel；
The mobile terminal carries out receiving and transmitting signal frequency compensation, bag according to the frequency of oscillation and the Doppler frequency to prestore
It includes：
Choose frequency of oscillation corresponding with present communications channel；
The mobile terminal carries out frequency compensation according to selected frequency of oscillation and the Doppler frequency to receiving and transmitting signal.
4. frequency compensation method according to claim 1, which is characterized in that the mobile speed of the acquisition for mobile terminal itself
Degree, including：
The acquisition for mobile terminal movement velocity of itself；
The mobile terminal is using component of the movement velocity on institute's access base station direction as the translational speed.
5. frequency compensation method according to claim 1, which is characterized in that the translational speed of the mobile terminal be more than etc.
In 150 kilometers/hour.
6. a kind of mobile terminal, which is characterized in that the mobile terminal includes memory, processor and the frequency mixer of coupling, institute
Memory is stated to be used for：Preserve frequency of oscillation；
The processor is used for：Obtain the translational speed of the mobile terminal；After the mobile terminal access base station, institute is obtained
State the communication carrier frequency of base station；According to the translational speed and the communication carrier frequency, Doppler frequency is calculated to obtain；
The frequency mixer is used for：According to the frequency of oscillation and the Doppler frequency to prestore, frequency compensation is carried out to receiving and transmitting signal.
7. mobile terminal according to claim 6, the processor is further used for based on calculation formula, according to the shifting
Dynamic speed and the communication carrier frequency calculate to obtain Doppler frequency；The calculation formula is：
fd=(fc×v)/c
Wherein, fdFor the Doppler frequency, fcFor the communication carrier frequency, v is the translational speed, and c is the light velocity.
8. mobile terminal according to claim 6, preserved in the memory corresponding to the multiple of multiple communication channels
Frequency of oscillation；The processor is further used for choosing frequency of oscillation corresponding with present communications channel；The frequency mixer is into one
It walks, according to selected frequency of oscillation and the Doppler frequency, frequency compensation to be carried out to receiving and transmitting signal.
9. mobile terminal according to claim 6, the processor, which is further used for obtaining the mobile terminal, to be connect
Enter the translational speed on the direction of base station.
10. a kind of storage device, which is characterized in that for the storage device for storing program data, the storage data can
It is performed to realize the method any one of claim 1-5.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711039738.9A CN108092675A (en) | 2017-10-31 | 2017-10-31 | A kind of frequency compensation method, mobile terminal and storage device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711039738.9A CN108092675A (en) | 2017-10-31 | 2017-10-31 | A kind of frequency compensation method, mobile terminal and storage device |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008219541A (en) * | 2007-03-06 | 2008-09-18 | Nec Corp | Doppler shift compensation method and mobile communication system having its function |
| US20100248614A1 (en) * | 2009-03-27 | 2010-09-30 | Fujitsu Limited | Relay station, relay method, receiving station and receiving method |
| CN101980453A (en) * | 2010-10-16 | 2011-02-23 | 中国科学院上海微系统与信息技术研究所 | Method and system for estimating and compensating Doppler frequency |
| CN102412878A (en) * | 2011-11-25 | 2012-04-11 | 南昌航空大学 | Method for estimating Doppler frequency in high-speed environment |
| CN105207766A (en) * | 2014-06-27 | 2015-12-30 | 展讯通信（上海）有限公司 | Frequency shift compensation method, device and mobile terminal |
-
2017
- 2017-10-31 CN CN201711039738.9A patent/CN108092675A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008219541A (en) * | 2007-03-06 | 2008-09-18 | Nec Corp | Doppler shift compensation method and mobile communication system having its function |
| US20100248614A1 (en) * | 2009-03-27 | 2010-09-30 | Fujitsu Limited | Relay station, relay method, receiving station and receiving method |
| CN101980453A (en) * | 2010-10-16 | 2011-02-23 | 中国科学院上海微系统与信息技术研究所 | Method and system for estimating and compensating Doppler frequency |
| CN102412878A (en) * | 2011-11-25 | 2012-04-11 | 南昌航空大学 | Method for estimating Doppler frequency in high-speed environment |
| CN105207766A (en) * | 2014-06-27 | 2015-12-30 | 展讯通信（上海）有限公司 | Frequency shift compensation method, device and mobile terminal |
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Application publication date: 20180529 |