CN110149589A - A kind of localization method of the difference based on angle of arrival - Google Patents
A kind of localization method of the difference based on angle of arrival Download PDFInfo
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- CN110149589A CN110149589A CN201910530686.8A CN201910530686A CN110149589A CN 110149589 A CN110149589 A CN 110149589A CN 201910530686 A CN201910530686 A CN 201910530686A CN 110149589 A CN110149589 A CN 110149589A
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- base station
- aoa
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/02—Services making use of location information
- H04W4/023—Services making use of location information using mutual or relative location information between multiple location based services [LBS] targets or of distance thresholds
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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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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Position Fixing By Use Of Radio Waves (AREA)
Abstract
The invention discloses a kind of localization methods of difference based on angle of arrival (AOA) suitable for user terminal.The location information of oneself is included in broadcast channel and sends by base station first；Secondly, AOA of the mobile station using the pilot signal estimation downlink signal in broadcast channel, and receive the location information of base station；It next, mobile station chooses the AOA angle of 3 base stations, and is to calculate other 2 AOA and the differential seat angle between it, and according to the radius of the distance estimations circle between AOA differential seat angle and base station with reference to angle with one of AOA；Finally according to the position of 2 round intersection point calculation mobile stations.
Description
Technical field
The present invention is a kind of localization method suitable for multiaerial system, and the position of terminal is determined using the difference of angle of arrival
It sets, belongs to the positioning field in mobile communication system, the localization method of specially a kind of difference based on angle of arrival.
Background technique
Existing localization method mainly includes multipoint positioning (Multilateration) method and co-positioned
(Cooperative Location) method.So-called multipoint positioning is exactly that receiving end measures the signal that multiple transmitting terminals are sent, root
Oneself position is determined according to the method for geometry, and these transmitting terminals are oneself known position, such as forth generation mobile communication system
The OTDOA (Observed Time Difference of Arrival) and AOA (Angle of Arrival) that system (4G) is supported
+TA(Time Advance).OTDOA sends position location pilot signal by down channel, then measures each base station pilot signals and arrives
The position of user is estimated up to the time difference of user terminal.AOA+TA mainly pass through measurement uplink signal angle of arrival (AOA) and
Arrival time estimates the position of user.Uplink signal arrival direction is defined as according to 3GPP TS 38.215, AOA and base station is joined
Examine the angle in direction.Reference direction is the due north of base station geographic position, and the angle rotated counterclockwise is positive, clockwise to be negative.
The angular range of AOA is 0 degree to 360 degree, and resolution ratio is 0.5 degree.As shown in Figure 1, base station (eNB) is believed by uplink (Uplink)
The AOA of arriving signal is estimated in road, and calculated by TA in synchronizing process instruction signal arrival time and its accordingly away from
From finally estimating the position of user according to AOA and distance.
In order to increase the utilization rate of frequency spectrum and power, the 5th Generation Mobile Communication System (5G) will be in transmitting terminal and receiving end
Multi-antenna technology is all used, so that base station be allow to form transmission wave beam, user terminal is estimated that the AOA of signal.But by
It is random in the position and direction of user, so the reference direction of AOA is also random.In this case, even if user
It is also unable to estimate out the position of itself, as shown in Figure 2 due to not knowing reference direction in the position for knowing base station.Though from Figure 2 it can be seen that
Right user knows the position of base station and at a distance from base station, but the reference direction of the AOA due to not knowing oneself estimation is directed toward
Where, so being unable to estimate the position of itself.Traditional AOA+TA method is only applicable to uplink, and can only be estimated by base station.
In a cellular communication system, uplink signal is sent, it is necessary to first establish radio resource connection (RRC), this necessarily leads to positioning
Time delay increases.
Summary of the invention
The purpose of the present invention is being directed to user terminal, using the angle of arrival of aerial array estimation downlink signal, and difference is calculated
Then the difference of the angle of arrival of base station estimates self-position, and further provide for accordingly it is a kind of it is fast and reliable, implementation complexity is low
AOA localization method, to solve the above problems, the invention discloses a kind of localization methods of difference based on angle of arrival.The present invention
It proposes one kind and is applicable to downlink (Downlink), the method that can be positioned by user.This method passes through estimation different base station
The difference of the angle of arrival of downlink signal, user terminal can estimate the position of itself in the case where not knowing reference direction, and calculate
Complexity is low, does not need to increase any additional device.Due to only using downlink signal, for example, downlink broadcast channel with it is synchronous
Channel etc., so reducing the time delay of positioning without first establishing RRC connection.
In order to reach the goals above, the invention provides the following technical scheme:
A kind of localization method of the difference based on angle of arrival, comprising the following steps: step 1), base station are by the location information of oneself
It is sent included in broadcast channel；
Step 2), mobile station estimate the AOA of downlink signal using the pilot signal in broadcast channel, and receive the position of base station
Confidence breath；
Step 3), mobile station choose the AOA angle of 3 base stations, and are to calculate other 2 with reference to angle with one of AOA
A AOA and the differential seat angle between it；
Step 4), mobile station calculate the circle that 2 base stations are formed according to the distance between 2 AOA differential seat angles and 2 base stations
Radius；
Step 5), according to the position of 2 round intersection point calculation mobile stations.
Further, in step 1, base station includes base station A, base station B, base station C, base station A and base station B, base station C by oneself
Location information be included in broadcast channel in send.
Further；In step 3, obtain with the AOA of base station A being with reference between angle obtained base station A and base station B
AOA differential seat angle is θAB, the AOA with base station A is that the AOA differential seat angle obtained between base station A and base station C with reference to angle is θAC。
Further, in step 4, the center of circle for calculating separately out the circle where base station A and base station B isRadius
For RAB；The center of circle with the circle where base station A and base station C isRadius is RAC, there are two two round intersection points, wherein
One point is in base station A, another puts the position that can determine user, i.e. user location meets
Wherein, the location information that base station is obtained from broadcast channel, calculating the distance between base station A and base station B is
dAB, calculate the radius R of the circleAB；Calculating the distance between base station A and base station C is dAC, calculate the radius R of the circleACMeter
It is as follows to calculate formula:
The invention has the following beneficial effects:
1, method of the invention can be realized in user terminal, reduce the time delay of positioning；
2, this method influences existing mobile communication standard less, to can be adapted for the communication that any user terminal has multiple antennas
System only need to increase simple calculating, not need to increase additional hardware device.
Detailed description of the invention
Figure 1A OA+TA positioning schematic；
The reference direction schematic diagram of Fig. 2 user terminal；
Schematic illustration of the Fig. 3 based on AOA differential seat angle；
Tri- base station location schematic diagram of Fig. 4.
Specific embodiment
With reference to the accompanying drawings and detailed description, the present invention is furture elucidated, it should be understood that following specific embodiments are only
For illustrating the present invention rather than limiting the scope of the invention.
Embodiment 1
Consider that base station and user are fitted with multiple antennas, user can accurately estimate out the angle of arrival of signal.Assuming that base
The location information of oneself is included in broadcast channel by the A and base station B that stands to be sent in downlink, as shown in Figure 3.Receiving end passes through broadcast
It is respectively α that pilot signal in channel can estimate base station A and the AOA of base station B signal respectivelyAAnd αB, and with the AOA of base station A
To calculate the differential seat angle of AOA with reference to angle are as follows:
θ=αB-αA[formula one] is as seen from Figure 3, all to meet the user locations and base station A and base station B mono- that differential seat angle is θ
It rises and constitutes a circle.Since user has obtained the location information of base station from broadcast channel, base station A and base can be calculated
Stand the distance between B, it is assumed that is d.According to Pythagoras theorem, the radius R of the circle can be calculated are as follows:
After calculating R, center of circle O can be calculated according to base station A and base station B location.Assuming that the two-dimensional coordinate of base station A is (xA,
yA), the two-dimensional coordinate of base station B is (xB,yB), then the position in the center of circle meets:
After the position in the center of circle is calculated, the coordinate at the upper any point of circle can be calculated, is met:
(xAB-xO)2+(yAB-yO)2=R2[formula four]
Wherein (xAB,yAB) indicate the possible position of user obtained with the AOA differential seat angle of base station A and base station B.
And so on, it is assumed that there are 3 base stations in system, as shown in figure 4, respectively base station A, B and C, then available
AOA with base station A is that the AOA differential seat angle between the base station A obtained with reference to angle and base station B is θAB, it is ginseng with the AOA of base station A
Examining the AOA differential seat angle that angle obtains between base station A and base station C is θAC, as shown in Figure 4.It can be calculated separately out according to [formula two]
The center of circle of circle where base station A and base station B isRadius is RAB；The center of circle with the circle where base station A and base station C isRadius is RAC.There are two two round intersection points, but one of them is put in base station A, so another point can be true
Determine the position of user, i.e. user location meets
Therefore the localization method for obtaining a kind of difference based on angle of arrival suitable for user terminal realizes that steps are as follows:
The location information of oneself is included in broadcast channel and sends by step 1), base station；
Step 2), mobile station estimate the AOA of downlink signal using the pilot signal in broadcast channel, and receive the position of base station
Confidence breath；
Step 3), mobile station choose the AOA angle of 3 base stations, and are to calculate other 2 with reference to angle with one of AOA
A AOA and the differential seat angle between it；
Step 4), mobile station calculate the circle that 2 base stations are formed according to the distance between 2 AOA differential seat angles and 2 base stations
Radius；
Step 5), according to the position of 2 round intersection point calculation mobile stations.
The technical means disclosed in the embodiments of the present invention is not limited only to technological means disclosed in above embodiment, further includes
Technical solution consisting of any combination of the above technical features.It should be pointed out that for those skilled in the art
For, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also considered as
Protection scope of the present invention.
Claims (4)
1. a kind of localization method of the difference based on angle of arrival, it is characterised in that:
1) location information of oneself is included in broadcast channel and sends by base station；
2) mobile station calculates the AOA of downlink signal using the pilot signal in broadcast channel, and receives the location information of base station；
3) mobile station chooses the AOA angle of 3 base stations, and is to calculate other 2 AOA therewith with reference to angle with one of AOA
Between differential seat angle；
4) mobile station calculates the radius for the circle that 2 base stations are formed according to the distance between two AOA differential seat angles and 2 base stations；
5) according to the position of 2 round intersection point calculation mobile stations.
2. a kind of localization method of the difference based on angle of arrival as described in claim 1, it is characterised in that: in step 1, base station packet
Base station A, base station B, base station C are included, the location information of oneself is included in broadcast channel by base station A and base station B, base station C to be sent.
3. a kind of localization method of the difference based on angle of arrival as claimed in claim 2, it is characterised in that: in step 3, with base station
The AOA of A is that the AOA differential seat angle between the base station A obtained with reference to angle and base station B is θAB, it is with reference to angle with the AOA of base station A
Obtaining the AOA differential seat angle between base station A and base station C is θAC。
4. a kind of localization method of the difference based on angle of arrival as claimed in claim 3, it is characterised in that: in step 4, count respectively
The center of circle for calculating the circle where base station A and base station B isRadius is RAB；With the circle of the circle where base station A and base station C
The heart isRadius is RAC, there are two two round intersection points, and in base station A, another puts and determines user one of point
Position, i.e., user location meet
Wherein, the location information that base station is obtained from broadcast channel, calculating the distance between base station A and base station B is dAB, meter
Calculate the radius R of the circleAB；Calculating the distance between base station A and base station C is dAC, calculate the radius R of the circleAC
Calculation formula is as follows:
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111083637A (en) * | 2019-12-31 | 2020-04-28 | 哈尔滨工程大学 | High-precision positioning method for combined MIMO base station and non-MIMO base station |
| CN112702786A (en) * | 2020-12-10 | 2021-04-23 | 中山大学 | Method, device, equipment and medium for positioning moving target |
| CN114302336A (en) * | 2021-12-30 | 2022-04-08 | 三星半导体(中国)研究开发有限公司 | Method and system for determining terminal position |
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| CN104869636A (en) * | 2015-05-12 | 2015-08-26 | 四川师范大学 | Indoor positioning method based on distance measurement information fusion |
| CN105979579A (en) * | 2016-05-19 | 2016-09-28 | 华东交通大学 | Application of TOA/AOA mixed positioning method in LTE system |
| CN107105498A (en) * | 2016-02-22 | 2017-08-29 | 华为技术有限公司 | Localization method and device |
| WO2018194716A1 (en) * | 2017-04-20 | 2018-10-25 | Raytheon Company | Interferometric time delay of arrival |
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Patent Citations (5)
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| WO2015078000A1 (en) * | 2013-11-29 | 2015-06-04 | 华为技术有限公司 | Terminal positioning method, positioning server and terminal |
| CN104869636A (en) * | 2015-05-12 | 2015-08-26 | 四川师范大学 | Indoor positioning method based on distance measurement information fusion |
| CN107105498A (en) * | 2016-02-22 | 2017-08-29 | 华为技术有限公司 | Localization method and device |
| CN105979579A (en) * | 2016-05-19 | 2016-09-28 | 华东交通大学 | Application of TOA/AOA mixed positioning method in LTE system |
| WO2018194716A1 (en) * | 2017-04-20 | 2018-10-25 | Raytheon Company | Interferometric time delay of arrival |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111083637A (en) * | 2019-12-31 | 2020-04-28 | 哈尔滨工程大学 | High-precision positioning method for combined MIMO base station and non-MIMO base station |
| CN111083637B (en) * | 2019-12-31 | 2021-04-30 | 哈尔滨工程大学 | High-precision positioning method for combined MIMO base station and non-MIMO base station |
| CN112702786A (en) * | 2020-12-10 | 2021-04-23 | 中山大学 | Method, device, equipment and medium for positioning moving target |
| CN114302336A (en) * | 2021-12-30 | 2022-04-08 | 三星半导体(中国)研究开发有限公司 | Method and system for determining terminal position |
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Application publication date: 20190820 |