CN109041214A - A kind of mobile location method and system - Google Patents
A kind of mobile location method and system Download PDFInfo
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- CN109041214A CN109041214A CN201810948647.5A CN201810948647A CN109041214A CN 109041214 A CN109041214 A CN 109041214A CN 201810948647 A CN201810948647 A CN 201810948647A CN 109041214 A CN109041214 A CN 109041214A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
- H04W64/003—Locating users or terminals or network equipment for network management purposes, e.g. mobility management locating network equipment
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
- H04W64/006—Locating users or terminals or network equipment for network management purposes, e.g. mobility management with additional information processing, e.g. for direction or speed determination
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- Position Fixing By Use Of Radio Waves (AREA)
Abstract
The present invention provides a kind of mobile location method and systems, wherein by the way that communication system is modeled as round or ball array in cartesian coordinate system, the pilot signal that mobile terminal issues is obtained using the antenna in circular antenna array, and the pilot signal received is decomposed into Fourier space；The coefficient of the Fourier space decomposited is substituted into channel observation function, and the peak value of the channel observation function is determined as to the position where each mobile terminal.The method disclosed in the present and system are to use in round UA or spherical shape UA communication system, are the nonlinear function of position based on channel response, therefore be more in line with the development in epoch compared to existing location technology.
Description
Technical field
The present invention relates to field of communication technology more particularly to a kind of mobile location method and systems.
Background technique
In present mobile communication, mobile location method is believed using the radio wave propagated between base station and mobile station
It number is positioned.Such method is by detecting the radio wave signal propagated between the base station and mobile station that are located at known location
Characteristic parameter determine distance or the direction of mobile station, current mobile communications network is all cellular network, wherein commonly using
Mobile location method be broadly divided into the positioning based on direction and the positioning based on distance.It is summarized as follows several positioning skills
Art:
1. the location technology based on direction
Angle of arrival (Arrival of Angle, AOA) location technology is that movement using receiver antenna array is measured in base station
Incidence angle, that is, signal direction of platform emitting radio waves, radial line, that is, rhumb line of composition base station to mobile station.This method needs
The source direction of signal specific is measured using special aerial array in base station.For a base station, AOA measurement can
To obtain specific movement station direction, when two base stations measure the signal that same movement station is issued simultaneously, two base stations
The focus of each resulting direction straight line of measurement AOA is exactly the position where movement station.On two-dimensional surface, multiple base stations just have
More such rays, their focus are exactly the position of mobile station undetermined.In 3G mobile communication system, smart antenna skill
Art has been widely applied, and base station can accurately measure AOA value, realizes AOA positioning.
Although the principle of this localization method is very simple, in actual application there are it is some be difficult to overcome lack
Point.Firstly, radiofrequency signal is line-of-sight transmission between the measured movement station of AOA positioning requirements and all base stations for participating in measurement
(Line of Sight's, LOS).Non-line-of-sight transmission (Not Line of Sight, NLOS) will come to AOA positioning belt can not
The error of prediction.Even the multipath effect of radiofrequency signal can still interfere the survey of AOA in the case where based on transmitted with LOS
Amount.Secondly as the limitation of antenna equipment angular resolution, the measurement accuracy of AOA is at a distance from the asking of base station and movement station
Increase and it is ever-reduced.
2. the location technology based on distance
Arrival time positions (Time of Arrival, TOA): propagation of the measurement electric wave from mobile station to base station receiver
Time, according to the propagation time it is known that mobile station is at a distance from base station.Mobile station should be using base station as the center of circle, and mobile station arrives
The distance of base station is the radius of circle, and multiple base stations determine multiple such circles, in two-dimensional surface, the position of mobile station by
The intersection points of multiple circles determines.When mobile station and base station are not at direct-view range, then mistake can be generated to the estimation of location of mobile station
Difference.If there is being more than 3 or more base stations, then precision can be improved.
Reaching time-difference positions (Time Difference of Arrival, TDOA): between mobile station and two base stations
It is poor that there are a certain distance, therefore utilizes this there are the regular hour is poor when from the signal that mobile station is sent to two base stations
Time difference can calculate the estimated location of mobile station.Assuming that being respectively obtained there are three base station coordinates using first base station as standard
The time difference t1 of second base station and first base station, the time difference t2 of third base station and first base station, signal time are poor
Multiplied by propagation velocity of electromagnetic wave, obtain range difference and.When ignoring signal errors present in actual conditions, TDOA actually returns
Knot solves two hyp intersection points.On two-dimensional surface, mobile station is located at using two base stations as on the hyperbola of focus, and two
The hyperbola of intersection is assured that the estimated location of mobile station.TDOA at least needs the base station of three known coordinate positions, leads to
The signal transmission time difference obtained between different base station is crossed to position.TDOA method compared with TOA method, advantage first is that: calculate
It is identical to all base stations and error and be zero that error is calculated when TDOA value, these errors include public multidiameter delay and
Synchronous error.
Positioning accuracy is dependent on radio propagation environment, receiver design, noise and interference characteristic, same position redundant measurement
Quantity, the complexity using signal processing.TDOA/TOA measurement error is usually by following 2 part in actual cellular system
Composition:
A) by device for detecting base station bring error, such as mobile station and the clock synchronous error of base station, detection device precision
And detection process time delay bring error etc..This fractional error is reduced with the development of timing technology and signal detection technique.
B) error generated by channel, mainly by multipath effect and non-line-of-sight propagation bring error.This fractional error
Channel circumstance is depended primarily on, can use the influence that respective algorithms reduce it to positioning accuracy.
Cloud Radio Access Network (C-RAN) is the new architecture designed for next generation wireless network.In this framework, hardware
Equipment is reduced to the remote radio unit (RRU) (Radio Remote Unit, RRU) of low-complexity, each RRU be integrated with antenna and
Radio frequency (Radio Frequency, RF) component.RRU is connected to data center by optical fiber and carries out high speed data transfer.In addition,
The low cost and low-complexity of RRU makes its dense deployment can be improved the network coverage and capacity.In C-RAN, base station is handled
Unit (Building Base band Unit, BBU) concentrates in together, and this centralization signal processing function can realize cloud meter
It calculates, reduces network operation cost and energy consumption, promote network upgrade and mitigate multi-user interference.Radio Access Network in recent years
In densification and centralized signal processing trend surface, following mobile network may include immanent antenna, this
A little wireless antennas can be configured to a large-scale vast array, the cell with its evolution, in conventional cellular network
It disappears, mobile device is led to having ubiquitous huge aerial array (Ubiquitous Antenna Array, UA)
Letter.
UA communication network is considered the limit extension form of network MIMO, because it has many antenna lists
Member provides ubiquitous access for wireless network.It is different to Single-point system from traditional point-to-point or multiple spot, in UA system
In, mobile device is surrounded by intensive antenna, and signal will reach mobile station from omnidirection.It is usually richness in traditional mimo channel
Channel Modeling can be random matrix, and analyze its capacity using probability theory and linear algebra by scatter channel environment.Have
In the UA channel of free-space propagation, because channel capacity depends on array geometry and user location, institute is in this way
Not applicable.UA channel is only determined by some parameters of user location on free space, then the positioning of the position to user
It is the importance of channel estimation.
In free space, the channel between mobile station and base station is only dependent upon the position of mobile station, determines mobile station
Channel information searches its position.Since large-scale distributed array is circular geometry, to the orientation problem of mobile station
It can be solved by the Harmonic Decomposition of UA received signal.When only consideration uses single frequency pilot sign estimation multi-user UA letter
When road.Channel is determined by user location, because of referred to herein as location sensitive channel (Location Induced Channels, LI-
channels).Since channel response is the nonlinear function of position, this makes traditional linear channel estimate no longer to be applicable in.
Therefore, the existing technology needs further improvement.
Summary of the invention
In view of the above shortcomings in the prior art, the purpose of the present invention is to provide a kind of methods of mobile position estimation
And system, overcoming channel response in the prior art is the nonlinear function of position, can not be to movement using traditional linear channel
The defect of platform progress precise positioning.
A kind of mobile location method of first embodiment disclosed by the embodiments of the present invention, wherein include:
The pilot signal that mobile terminal issues is obtained using circular antenna array, and extremely by the pilot signal transmission received
Digital signal processing device；
The pilot signal received is decomposed into Fourier space, and Fu that will be decomposited by the digital signal processing device
In the coefficient of leaf series substitute into channel observation function, and be determined as respectively according to the peak value of the calculated channel observation function
Position where a mobile terminal.
Optionally, before the above method further include:
Communication system is modeled as circular array in cartesian coordinate system, the circular array is centered on origin, circle
Multiple mobile terminals are distributed in shape array.
Optionally, the step of pilot signal that mobile terminal sending is obtained using circular antenna array includes:
Setting each circular array antenna is omnidirectional antenna, and with any one mobile terminal and any one circle
Position angle between array antenna is that parameter calculates the distance between each mobile terminal and each circular array antenna function；
The channel response function between mobile terminal and array antenna is established according to the distance function；
The pilot signal received at each array antenna is obtained according to the channel response function.
Optionally, the method also includes:
It is muting when the coefficient of the Fourier space decomposited, and the channel observation function is also noiseless
's.
Optionally, the coefficient of the Fourier space that will be decomposited substitutes into the step of channel observation function further include:
The coefficient of the Fourier space is expressed as infinite sequence, and channel is established as parameter using the infinite sequence and is seen
Survey function.
A kind of mobile location method of second embodiment disclosed by the embodiments of the present invention, wherein include:
The pilot signal that mobile terminal issues is obtained using spherical antenna array, and extremely by the pilot signal transmission received
Digital signal processing device；
The pilot signal received is decomposed into spherical harmonic by the digital signal processing device, and to the spherical shape
Harmonic function carries out Laplace series expansion, and the laplace coefficient that will acquire substitutes into channel observation function, and by institute
The peak value for stating channel observation function is determined as position where each mobile terminal.
Optionally, the step of pilot signal that mobile terminal sending is obtained using spherical antenna array includes:
Setting each spherical array antennas is omnidirectional antenna, and with any one mobile terminal and any one circle
Position angle between array antenna is that parameter calculates the distance between each antenna and each spherical array antennas function；
The channel response function between mobile terminal and array antenna is established according to the distance function；
The pilot signal received at each array antenna is obtained according to the channel response function.
Optionally, the step further include: using in ball array between the position coordinates of any two aerial array
Angle function, and according to the orthogonality of harmonic function, obtain any one array antenna received to pilot signal Fourier
Coefficient.
A kind of mobile station locating system of 3rd embodiment disclosed by the embodiments of the present invention, wherein include: circular antenna array
Sum number word information processing device；
The circular antenna array, for obtaining the pilot signal of mobile terminal sending, and the pilot signal that will be received
It is transmitted to digital signal processing device；
The digital signal processing device for the pilot signal received to be decomposed into Fourier space, and will decompose
The coefficient of Fourier space out substitutes into channel observation function, and is sentenced according to the peak value of the calculated channel observation function
It is set to the position where each mobile terminal.
Fourth embodiment disclosed by the embodiments of the present invention is a kind of mobile station locating system, wherein includes: spherical antenna battle array
Column and digital signal processing device；
The spherical antenna array, for obtaining the pilot signal of mobile terminal sending, and the pilot signal that will be received
It is transmitted to digital signal processing device；
The digital signal processing device will be described for the pilot signal received to be decomposed into spherical harmonic
Spherical harmonic carries out Laplace series expansion, and the laplace coefficient that will acquire substitutes into channel observation function, and
The peak value of the channel observation function is determined as to the position where each mobile terminal.
Beneficial effect, the present invention provides a kind of mobile location method and systems, wherein by cartesian coordinate system
It is interior that communication system is modeled as round or ball array, the pilot tone that mobile terminal issues, which is obtained, using circular antenna array believes
Number, and the pilot signal received is decomposed into Fourier space；The coefficient of the Fourier space decomposited is substituted into channel to see
Function is surveyed, and the peak value of the channel observation function is determined as to the position where each mobile terminal.It is disclosed in this invention
Method and system are to use in round UA or spherical shape UA communication system, are the nonlinear function of position based on channel response, because
This is more in line with the development in epoch compared to existing location technology.
Detailed description of the invention
Fig. 1 is the step flow chart of the mobile location method of first embodiment provided by the present invention；
Fig. 2 is the schematic diagram that UA is circular array in the concrete application embodiment of the method provided by the present invention；
Fig. 3 is the schematic diagram of zero Bessel function in first implementation of the method provided by the present invention；
Fig. 4 is the schematic diagram positioned in method provided by the present invention to mobile terminal；
Fig. 5 is the step flow chart of first implementation of the method for the invention in a particular application；
Fig. 6 is the step flow chart of the mobile location method of second embodiment provided by the present invention；
Fig. 7 is the schematic diagram that UA is ball array in the concrete application embodiment of the method provided by the present invention.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer and more explicit, right as follows in conjunction with drawings and embodiments
The present invention is further described.It should be appreciated that specific embodiment described herein is used only for explaining the present invention, and do not have to
It is of the invention in limiting.
In cellular networks, AOA has certain positioning accuracy, but this method compares the equipment requirement of receiver
Height implements the higher cost of operation, and only available reverse link positions；In Cellular Networks wireless system, if it is possible to
To the measured value of TOA/TDOA, then the distance between mobile station and base station or mobile station can be obtained by calculation to respectively
The difference of distance between base station.The equation group according to listed by geometrical model, solving result can be used as the coordinate of estimated location.So
And difficult point be these equation groups be it is nonlinear, solve relatively difficult, many algorithms are all how efficiently quasi- in research at present
Really solve these equation groups.
It is herein based on C-RAN system, the cell being blurred in cellular network, by huge circular antenna array group
At communication system.In UA channel, because channel capacity depends on array geometry and user location, and channel response
It is the nonlinear function of position, the modern algorithm in positioning, optimal Posterior estimator is difficult to handle, because it needs to solve one group
Nonlinear equation group.So received pilot signal is decomposed into fourier series by method and system proposed in this paper, in turn
The detection of peak value is carried out to the channel observation function of generation, this can be obtained by the pilot signal received in aerial array
It is positioned.
The specific embodiment of the invention discloses a kind of mobile location method, as shown in Figure 1, the method includes following steps
It is rapid:
Step S11, the pilot signal that mobile terminal issues is obtained using circular antenna array, and the pilot tone received is believed
Number it is transmitted to digital signal processing device；
Step S12, the pilot signal received is decomposed into Fourier space by the described digital signal processing device, and will be divided
The coefficient of the Fourier space solved substitutes into channel observation function, and the peak value according to the calculated channel observation function
It is determined as the position where each mobile terminal.
Communication system is modeled as circular array first in the above method, described in circular antenna array and mobile terminal distribution
In circular array, the pilot signal that antenna array receiver user's mobile station in circular array issues, then by digital signal
Reason unit is handled the pilot signal using the step in the above method, to realize the positioning to user's mobile station.
As shown in Fig. 2, UA is modeled as circular array, wherein the center of circle is o, radius r0.Assuming that the distribution of intensive UA
It is that continuously, this is convenient for theory analysis.The system includes the UA centered on origin and the U mobile terminal (list by UA encirclement
Antenna user), user in the horizontal plane position by X1,X2,…XuIt indicates, then XuCoordinate beArray antenna A's
Coordinate isWhereinIt is azimuth,It is polarizing angle.
The circular antenna array obtains the step of pilot signal that mobile terminal issues and includes:
Setting each circular array antenna is omnidirectional antenna, and with any one mobile terminal and any one circle
Position angle between array antenna is that parameter calculates the distance between each antenna and each circular array antenna function；
The channel response function between mobile terminal and array antenna is established according to the distance function；
It is obtained being located at the pilot signal received at array antenna A according to the channel response function.
Carrying out mobile position estimation using the method for first embodiment of the invention includes following four part:
1, mobile terminal pilot signal transmitted
Mobile terminal user is located near circular array center, that is to say, that ru/r0Far smaller than 1, then user XuWith day
The distance between line A is represented by
In formulaFor XuAngle between A.
It is assumed that all antennas are all omnidirectionals, then user XuChannel response between antenna A is represented by
Wherein λ indicates carrier wavelength.
Formula (1) is substituted into formula (2), and then it can be concluded that
The single frequency pilot sign s of mobile terminal user's simultaneous transmission in UA communication systemu, in order to, make to lead without loss of generality
Frequency symbolAgain by the above-mentioned channel response h obtainedu(A), so that it may obtain the pilot signal q received at antenna A
(A)。
2, antenna receives signal
The channel estimation of LI-channels is that user location is inferred from pilot tone training signal, i.e.,
Since q (A) is XuNonlinear function, so Linear Estimation is infeasible.
Since the time is divided into the time slot of unit symbol duration, and the effective aperture of omnidirectional antenna is λ2/ 4 π,
So received total pilot signal q (A) is expressed as at antenna A in any time slot
Wherein suIt is the frequency pilot sign emitted by user u.Z (A) is the additive white Gaussian noise at the A of position, and noise
Mean value is 0, variance 1.
3, signal processing
Since the coordinate of antenna A isIt can then useInstead of q (A), by the received pilot tone training signal of instituteIt is decomposed into Fourier space:
The then coefficient Q of Fourier spacekFor
Because fourier coefficient includes all information that user sends signal, only need to QkIt is handled.Locating
Before reason, for the ease of algorithm realization, some symbols are introduced.JnIt is zero-order Bessel letter for n rank Bessel function, such as Fig. 3
Number, and enable two sequence V1And V2Between product be defined as
Wherein []nGenerate the element that index is n.
And given positionThen Vn(Y) it can be indicated with Bessel function
Wherein a useful property of V is exactly the theorem followed in Bessel function, if there are two position X and Y, V
(X) product between V (Y) can indicate are as follows:
Later again to the coefficient Q of Fourier spacekIt processes, enables Q be expressed as infinite sequence ..., Q-1,Q0,Q1,….Then sequence
Column Q can be expressed as
Wherein, V (Xu)=..., V-1(Xu),V0(Xu),V1(Xu),…
4, user positions
Order receives training signalFourier coefficient QkBe it is muting, then estimate for LI-channels channel
The Key Functions Φ of meter can be expressed as
Φ (Y) is referred to as channel observation function, to be expressed to obtain Φ (Y) enclosed using sequence Q as the function of parameter
Formula has just used a key property of V, has exactly obeyed the theorem of Bessel function.
The channel observation function of round UA is muting, and the decomposition based on Q in formula (6) and formula (7), so
It is just available
When estimating user location, it is only necessary to the peak value of Φ (Y) is observed, because of zero Bessel function J0(x) in x=0
When reach maximum, that Φ (Y) will have peak value at user location.As shown in figure 4, it is positioned to user location
One example, wherein there is three users of equal intervals distance, spacing distance is indicated by two wavelength.In Φ (Y) function
In peak value at be to be identified by cartesian coordinate, the ripple in figure is generated by the tail portion of superposition Bessel function.
Optionally, the coefficient of the Fourier space that will be decomposited substitutes into the step of channel observation function further include:
The coefficient of the Fourier space is expressed as infinite sequence, and channel is established as parameter using the infinite sequence and is seen
Survey function.
The present invention based on the above method, also discloses another mobile location method, wherein include:
Step S21, the pilot signal that mobile terminal issues is obtained using spherical antenna array, and the pilot tone received is believed
Number it is transmitted to digital signal processing device；
Step S22, the pilot signal received is decomposed into spherical harmonic by the described digital signal processing device, and right
The spherical harmonic carries out Laplace series expansion, and the laplace coefficient that will acquire substitutes into channel observation letter
It counts, and the peak value of the channel observation function is determined as to the position where each mobile terminal.
Further, the step of pilot signal that mobile terminal sending is obtained using the spherical antenna array is wrapped
It includes:
Setting each spherical array antennas is omnidirectional antenna, and with any one mobile terminal and any one circle
Position angle between array antenna is that parameter calculates the distance between each antenna and each spherical array antennas function；
The channel response function between mobile terminal and array antenna is established according to the distance function；
It is obtained being located at the pilot signal received at array antenna A according to the channel response function.
Further, the step further include: using in ball array between the position coordinates of any two aerial array
Angle function, and according to the orthogonality of harmonic function, obtain in any one array antenna received to Fu of pilot signal
Leaf system number.
The above method is described in detail with specific embodiment below.
It is the localization method in round UA array in first embodiment, when specific embodiment can also be communication system construction in a systematic way
Mould is spherical shape UA array, and wherein the center of circle is o, radius r0.The system includes UA centered on origin and surrounded by UA U
Single-antenna subscriber, the position of user is by X1,X2,…XuIt indicates.Then XuCoordinate beThe coordinate of antenna A isWhereinIt is azimuth, (θu, θ) and it is polarizing angle.
This system shows it for the performance improvement of round UA corresponding part.It is with the main difference of first embodiment
Fourier series is replaced using spherical harmonic.
User is also to transmit single frequency pilot sign { su}={ 1 }, but received training signal changes at antenna,
It is expressed asUse spherical harmonic again laterLaplace series expansion is carried out to it, formula is as follows:
Wherein For laplace coefficient, it can be defined as
To obtainClosed expression, need to formula (13) further develop, whereinBy formula
(12) it obtains, so only needing pairIt is handled.
If there is two o'clock, coordinate is respectivelyWithIt can be obtained by
Wherein ψuIt is the angle between vector corresponding to this two o'clock.Due to harmonic functionWith orthogonality, institute
Formula (12) and (14) can be substituted into formula (13).So in this manner it is possible to obtainFurther evolution formula, it
It is by the Fourier coefficient of the received training signal of antenna A.It is as follows:
Wherein ι=1,2 ... and-ι≤m≤ι.
Define two setWithIt enablesWithWherein elementIs defined as:
The channel observation function in spherical UA communication system can be obtained laterIt is as follows:
Formula (15) and (16) are substituted into formula (17), so that it may it obtains
According to the addition theorem of spherical harmonic such as formula (19), so that it mayDevelop to formula (20)
Wherein ψuIt (A) is user XuWith the angle between antenna A.
Later final channel observation function can be obtained by the addition theorem in Bezier property
As in round UA array, and need detection functionPeak value, and then to user location into
Row positioning.
On the basis of the localization method disclosed in above-mentioned first embodiment, a kind of mobile station locating system is disclosed, is wrapped
It includes:
Circular antenna array sum number word information processing device；
The circular antenna array, for obtaining the pilot signal of mobile terminal sending, and the pilot signal that will be received
It is transmitted to digital signal processing device；
The digital signal processing device for the pilot signal received to be decomposed into Fourier space, and will decompose
The coefficient of Fourier space out substitutes into channel observation function, and is sentenced according to the peak value of the calculated channel observation function
It is set to the position where each mobile terminal.
On the basis of the localization method disclosed in above-mentioned second embodiment, another implementation disclosed by the embodiments of the present invention
The mobile station locating system of example, the positioning system includes: spherical antenna array and digital signal processing device；
The spherical antenna array, for obtaining the pilot signal of mobile terminal sending, and the pilot signal that will be received
It is transmitted to digital signal processing device；
The digital signal processing device will be described for the pilot signal received to be decomposed into spherical harmonic
Spherical harmonic carries out Laplace series expansion, and the laplace coefficient that will acquire substitutes into channel observation function, and
The peak value of the channel observation function is determined as to the position where each mobile terminal.
The present invention provides a kind of mobile location method and systems, wherein by cartesian coordinate system by communication system
System is modeled as round or ball array, obtains the pilot signal that mobile terminal issues using circular antenna array, and will receive
To pilot signal be decomposed into Fourier space；The coefficient of the Fourier space decomposited is substituted into channel observation function, and will
The peak value of the channel observation function is determined as the position where each mobile terminal.The method disclosed in the present and system,
It is to be used in round UA or spherical shape UA communication system, is the nonlinear function of position based on channel response, therefore compared to existing
Some location technologies are more in line with the development in epoch.
It, can according to the technique and scheme of the present invention and its hair it is understood that for those of ordinary skills
Bright design is subject to equivalent substitution or change, and all these changes or replacement all should belong to the guarantor of appended claims of the invention
Protect range.
Claims (10)
1. a kind of mobile location method characterized by comprising
The pilot signal that mobile terminal issues is obtained using circular antenna array, and by the pilot signal transmission received to number
Signal processing apparatus；
The pilot signal received is decomposed into Fourier space, and the Fourier that will be decomposited by the digital signal processing device
The coefficient of series substitutes into channel observation function, and is determined as each shifting according to the peak value of the calculated channel observation function
Position where dynamic terminal.
2. mobile location method according to claim 1, which is characterized in that in the above method further include:
Communication system is modeled as circular array in cartesian coordinate system, the circular array is centered on origin, circle
Multiple mobile terminals are distributed in column.
3. mobile location method according to claim 1, which is characterized in that described obtained using circular antenna array is moved
The step of pilot signal that dynamic terminal issues includes:
Setting each circular array antenna is omnidirectional antenna, and with any one mobile terminal and any one circular array day
Position angle between line is that parameter calculates the distance between each mobile terminal and each circular array antenna function；
The channel response function between mobile terminal and array antenna is established according to the distance function；
The pilot signal received at each array antenna is obtained according to the channel response function.
4. mobile location method according to any one of claims 1 to 3, which is characterized in that the method also includes:
It is muting when the coefficient of the Fourier space decomposited, and the channel observation function is also muting.
5. mobile location method according to claim 1, which is characterized in that the Fourier space that will be decomposited
Coefficient substitutes into the step of channel observation function further include:
The coefficient of the Fourier space is expressed as infinite sequence, and establishes channel observation letter by parameter of the infinite sequence
Number.
6. a kind of mobile location method characterized by comprising
The pilot signal that mobile terminal issues is obtained using spherical antenna array, and by the pilot signal transmission received to number
Signal processing apparatus；
The pilot signal received is decomposed into spherical harmonic by the digital signal processing device, and to the spherical harmonic
Function carries out Laplace series expansion, and the laplace coefficient that will acquire substitutes into channel observation function, and by the letter
The peak value of road observation function is determined as the position where each mobile terminal.
7. mobile location method according to claim 6, which is characterized in that described obtained using spherical antenna array is moved
The step of pilot signal that dynamic terminal issues includes:
Setting each spherical array antennas is omnidirectional antenna, and with any one mobile terminal and any one circular array day
Position angle between line is that parameter calculates the distance between each antenna and each spherical array antennas function；
The channel response function between mobile terminal and array antenna is established according to the distance function；
The pilot signal received at each array antenna is obtained according to the channel response function.
8. mobile location method according to claim 7, which is characterized in that the step further include: utilize spherical array
Angle function in column between the position coordinates of any two aerial array, and according to the orthogonality of harmonic function, must take office
Fourier coefficient of the array antenna received of anticipating to pilot signal.
9. a kind of mobile station locating system characterized by comprising circular antenna array sum number word information processing device；
The circular antenna array, for obtaining the pilot signal of mobile terminal sending, and the pilot signal transmission that will be received
To digital signal processing device；
The digital signal processing device for the pilot signal received to be decomposed into Fourier space, and will decomposite
The coefficient of Fourier space substitutes into channel observation function, and is determined as according to the peak value of the calculated channel observation function
Position where each mobile terminal.
10. a kind of mobile station locating system characterized by comprising spherical antenna array and digital signal processing device；
The spherical antenna array, for obtaining the pilot signal of mobile terminal sending, and the pilot signal transmission that will be received
To digital signal processing device；
The digital signal processing device, for the pilot signal received to be decomposed into spherical harmonic, by the spherical shape
Harmonic function carries out Laplace series expansion, and the laplace coefficient that will acquire substitutes into channel observation function, and by institute
The peak value for stating channel observation function is determined as position where each mobile terminal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810948647.5A CN109041214A (en) | 2018-08-20 | 2018-08-20 | A kind of mobile location method and system |
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| CN111459359A (en) * | 2020-03-31 | 2020-07-28 | 烟台艾睿光电科技有限公司 | Cursor moving method, device and equipment and infrared thermal imaging system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111459359A (en) * | 2020-03-31 | 2020-07-28 | 烟台艾睿光电科技有限公司 | Cursor moving method, device and equipment and infrared thermal imaging system |
| CN111459359B (en) * | 2020-03-31 | 2021-06-11 | 烟台艾睿光电科技有限公司 | Cursor moving method, device and equipment and infrared thermal imaging system |
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