CN108254719A - A kind of signal source localization method suitable for electromagnetic spectrum monitoring system - Google Patents
A kind of signal source localization method suitable for electromagnetic spectrum monitoring system Download PDFInfo
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- CN108254719A CN108254719A CN201711376314.1A CN201711376314A CN108254719A CN 108254719 A CN108254719 A CN 108254719A CN 201711376314 A CN201711376314 A CN 201711376314A CN 108254719 A CN108254719 A CN 108254719A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
- G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
- G01S5/12—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves by co-ordinating position lines of different shape, e.g. hyperbolic, circular, elliptical or radial
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/38—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system
- G01S19/39—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system the satellite radio beacon positioning system transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/42—Determining position
- G01S19/45—Determining position by combining measurements of signals from the satellite radio beacon positioning system with a supplementary measurement
- G01S19/46—Determining position by combining measurements of signals from the satellite radio beacon positioning system with a supplementary measurement the supplementary measurement being of a radio-wave signal type
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/318—Received signal strength
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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
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- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Quality & Reliability (AREA)
- Electromagnetism (AREA)
- Position Fixing By Use Of Radio Waves (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a kind of signal source localization methods suitable for electromagnetic spectrum monitoring system, carry out as follows：The GPS latitude and longitude coordinates in monitoring base station geographical location are converted into plane projection coordinate by step 1.；Step 2. chooses three base stations of RSSI value maximum, the wherein highest base station of RSSI value is as master base station,, according to master base station and the RSSI value and reception antenna height of i-th base station, signal source is acquired to i-th base station and the ratio of distances constant of master base station in remaining base station as time base stationLocus circle of the step 3. according to where signal source to the ratio of distances constant and master base station of time base station and master base station determines signal source with time plane projection coordinate of base station；Position of the step 4. according to where the geometrical relationship of two locus circles calculates signal source, and result is switched into GPS latitude and longitude coordinates.The signal source localization method that the present invention is suitable for electromagnetic spectrum monitoring system has the relevant parameter of signal source that electromagnetic monitoring base station receiver precision is high, can be accurately obtained.
Description
Technical field
The present invention relates to electromagnetic spectrum monitoring technical fields, and in particular to a kind of letter suitable for electromagnetic spectrum monitoring system
Number source localization method.
Background technology
Electromagnetic spectrum monitoring is one of technological means for realizing radio control, and the effective position to signal source is electromagnetism frequency
Compose one of hot spot of research.It, can only be by signal since monitored signal is unable to control and without any priori
Passive monitoring, that is, receive the position that signal source is estimated with processing.
In electromagnetic spectrum monitoring system, the location technology of generally use has：Arrival time (Time of Arrival,
TOF), reaching time-difference (Time Difference of Arrival, TDOA) and angle of arrival (Angle of Arrival,
AOA), these three methods are higher to the required precision of hardware, in the existing skimble-scamble feelings of ground monitoring base station receiver specification
Under condition, data that each monitoring base station can not be made full use of to receive.
Ground monitoring base station receiver can be relatively accurate the acquisition frequency of signal, bandwidth, received signal strength indicator
Parameters such as (Received Signal Strength Indication, RSSI), under nlos environment, according to Egli electric waves
Propagation model and transmission power with receive the relationship of power ask for signal source apart from when, the parameter needed includes：Signal frequency
Rate, transmitting antenna power, height of transmitting antenna and reception antenna height, i.e. formula：40lgd=Pt-RSSI-78-20lgf-
40lgd+20ht+20hr.Since monitoring base station can not obtain the relevant parameter of signal source, based on this, it is necessary to which research and development are a kind of with believing
The unrelated localization method of the relevant parameter in number source.
Invention content
The purpose of the present invention is be directed to the signal that existing electromagnetic monitoring base station receiver precision is not high, can be accurately obtained
The relevant parameter in source is less, proposes a kind of signal source localization method suitable for electromagnetic spectrum monitoring system.
The technical solution adopted by the present invention is：
A kind of signal source localization method suitable for electromagnetic spectrum monitoring system, specific steps include：
The GPS latitude and longitude coordinates in monitoring base station geographical location are converted into plane projection coordinate by step 1.；
Step 2. chooses three base stations of RSSI value maximum, and the wherein highest base station of RSSI value is as master base station, complementary basis
It stands as time base station, according to master base station and the RSSI value and reception antenna height of i-th base station, acquires signal source to i-th
A secondary base station and the ratio of distances constant of master base station
Step 3. is thrown according to signal source to the ratio of distances constant and master base station of time base station and master base station and time plane of base station
Shadow coordinate determines the locus circle where signal source；
Position of the step 4. according to where the geometrical relationship of two locus circles calculates signal source, and result is switched into GPS warps
Latitude coordinate.
Further, step 2, the specific calculating of signal source to master base station and the ratio of distances constant of i-th base station is as follows：
Egli radio waves propagation models are chosen, specific empirical equation is：
L=78+20lgf+40lgd-20ht-20hr (1)
Transmission power and the relationship of reception power are：
RSSI=Pt-L (2)
Therefore, master base station and the RSSI differences of i-th base station are：
The ratio of distances constant of signal source to i-th base station and master base station is：
Wherein, diFor signal source to the distance of i-th base station, d0For the distance of signal source to master base station, RSSIiIt is i-th
The RSSI value of a secondary base station, RSSI0For the RSSI value of master base station, hriFor the reception antenna height of i-th base station, hr0For main base
The reception antenna height stood.
Further, in step 3, according to ratio of distances constant k, the coordinate B of master base station0(x0,y0) and time base station coordinate Bi(xi,
yi) acquire locus circle where signal source S (x, y) it is specific calculate it is as follows：
λ in above formulaiSquare of ratio of distances constant, arrange locus circle normal equation：
The center of circle is：
Radius is：
In formula, di0For the distance from base station to master base station.
Further, in step 4, the position Specific Principles that signal source is acquired according to locus circle are as follows：
If there are two intersection points for two locus circles acquired, take the sum of the distance that distance participates in three base stations of operation minimum
Intersection point as source location；
If two locus circles acquired do not have intersection point, acquire and make with a point of the sum of the distance minimum of two locus circles
For source location；
If only there are one intersection points for two locus circles acquired, this intersection point is source location.
The signal source localization method that the present invention is suitable for electromagnetic spectrum monitoring system has electromagnetic monitoring base station receiver essence
The relevant parameter of signal source that degree is high, can be accurately obtained.
Description of the drawings
Fig. 1 is that the present invention provides positioning schematic.
Fig. 2 is that the present invention provides and acquires locus circle according to ratio of distances constant.
Fig. 3 is that the present invention provides emulation experiment base station present position.
Fig. 4 is that the present invention provides the positioning accuracy comparison diagram changed with RSSI ranging localizations with RSSI signal-to-noise ratio.
Fig. 5 is that the present invention provides the positioning accuracy comparison diagram changed with RSSI ranging localizations with base station spacing.
Fig. 6 is that the present invention provides the error comparison positioned whithin a period of time to individual signals source with RSSI ranging localizations
Figure.
Fig. 7 is that the present invention provides the mean error pair positioned whithin a period of time to multiple signal sources with RSSI ranging localizations
Than figure.
Specific embodiment
The present invention is further described with reference to specific embodiment, but does not limit the invention to these tools
Body embodiment.One skilled in the art would recognize that present invention encompasses may include in Claims scope
All alternatives, improvement project and equivalent scheme.
Referring to Fig. 1, a kind of localization method suitable for electromagnetic spectrum monitoring system of the present embodiment, specific steps include：
The GPS latitude and longitude coordinates in monitoring base station geographical location are converted into plane projection coordinate by step 1.；
Step 2. chooses three base stations of RSSI value maximum, and the wherein highest base station of RSSI value is as master base station, complementary basis
It stands as time base station, according to master base station and the RSSI value and reception antenna height of i-th base station, acquires signal source to i-th
A secondary base station and the ratio of distances constant of master base station
Step 3. is thrown according to signal source to the ratio of distances constant and master base station of time base station and master base station and time plane of base station
Shadow coordinate determines the locus circle where signal source；
Position of the step 4. according to where the geometrical relationship of two locus circles calculates signal source, and result is switched into GPS warps
Latitude coordinate.
The specific calculating of the ratio of distances constant of the step 2 of the present embodiment, signal source to master base station and i-th base station is as follows：
Egli radio waves propagation models are chosen, specific empirical equation is：
L=78+20lgf+40lgd-20ht-20hr (1)
Transmission power and the relationship of reception power are：
RSSI=Pt-L (2)
Therefore, master base station and the RSSI differences of i-th base station are：
The ratio of distances constant of signal source to i-th base station and master base station is：
Wherein, diFor signal source to the distance of i-th base station, d0For the distance of signal source to master base station, RSSIiIt is i-th
The RSSI value of a secondary base station, RSSI0For the RSSI value of master base station, hriFor the reception antenna height of i-th base station, hr0For main base
The reception antenna height stood.
With reference to figure 2, in the present embodiment step 3, according to ratio of distances constant k, the coordinate B of master base station0(x0,y0) and time base station
Coordinate Bi(xi,yi) acquire locus circle where signal source S (x, y) it is specific calculate it is as follows：
λ in above formulaiSquare of ratio of distances constant, arrange locus circle normal equation：
The center of circle is：
Radius is：
In formula, di0Distance for i-th base station to master base station.
In the present embodiment step 4, the position Specific Principles that signal source is acquired according to locus circle are as follows：
If there are two intersection points for two locus circles acquired, take the sum of the distance that distance participates in three base stations of operation minimum
Intersection point as source location；
If two locus circles acquired do not have intersection point, acquire and make with a point of the sum of the distance minimum of two locus circles
For source location；
If only there are one intersection points for two locus circles acquired, this intersection point is source location.
As shown in figure 3, being emulated using Wing IDE using python Programming with Pascal Language, set in the quadrangle of square region
Four base stations.The present invention and the positioning accurate of RSSI ranging localizations are weighed using the mean square error between positioning result and actual value
Degree,
As shown in figure 4, when to be base station spacing in figure be 20km, the present invention changes with RSSI ranging localizations with RSSI signal-to-noise ratio
Positioning accuracy comparison diagram.
As shown in figure 5, when to be RSSI signal-to-noise ratio in figure be 16dB, the present invention changes with RSSI ranging localizations with base station spacing
Positioning accuracy comparison diagram.
As shown in fig. 6, it is base station spacing when to be 20km, RSSI signal-to-noise ratio be 16dB in figure, the present invention determines with RSSI rangings
Position is whithin a period of time to the position error comparison diagram in individual signals source.
As shown in fig. 7, it is base station spacing when to be 20km, RSSI signal-to-noise ratio be 16dB in figure, the present invention determines with RSSI rangings
Position is whithin a period of time to the mean error comparison diagram of multiple signal sources positioning.
Conclusion：
It is compared by the positioning accuracy of Fig. 4, it can be deduced that conclusion：The present invention has better anti-noise than RSSI ranging localization
Property.
It is compared by the positioning accuracy of Fig. 5, it can be deduced that conclusion：The present invention is influenced than RSSI ranging localization by base station spacing
It is smaller.
By Fig. 6 and Fig. 7, it can be deduced that conclusion：The present invention has more preferably locating effect than RSSI ranging localization.
The present invention has suitable for the signal source localization method of electromagnetic spectrum monitoring system will to monitoring device hardware precision
It asks low, the features such as positioning accuracy is high, and performance is stablized, can accurately obtain signal source position.
Claims (4)
1. a kind of signal source localization method suitable for electromagnetic spectrum monitoring system, it is characterized in that carrying out as follows：
The GPS latitude and longitude coordinates in monitoring base station geographical location are converted into plane projection coordinate by step 1.；
Step 2. chooses three base stations of RSSI value maximum, and the wherein highest base station of RSSI value is made as master base station, remaining base station
For secondary base station, according to master base station and the RSSI value and reception antenna height of i-th base station, signal source is acquired to i-th time
Base station and the ratio of distances constant of master base station
Step 3. is sat according to signal source to the ratio of distances constant and master base station of time base station and master base station and time plane projection of base station
Mark determines the locus circle where signal source；
Position of the step 4. according to where the geometrical relationship of two locus circles calculates signal source, and result is switched into GPS longitudes and latitudes
Coordinate.
2. a kind of signal source localization method suitable for electromagnetic spectrum monitoring system according to claim 1, feature exist
In：In step 2, the specific calculating of the ratio of distances constant of signal source to master base station and i-th base station is as follows：
Egli radio waves propagation models are chosen, formula is：
L=78+20lgf+40lgd-20ht-20hr (1)
Transmission power and the relationship of reception power are：
RSSI=Pt-L (2)
Therefore, master base station and the RSSI differences of i-th base station are：
The ratio of distances constant of signal source to i-th base station and master base station is：
Wherein, diFor signal source to the distance of i-th base station, d0For the distance of signal source to master base station, RSSIiIt is i-th time
The RSSI value of base station, RSSI0For the RSSI value of master base station, hriFor the reception antenna height of i-th base station, hr0For master base station
Reception antenna height.
3. a kind of signal source localization method suitable for electromagnetic spectrum monitoring system according to claim 2, feature exist
In：In step 3, according to ratio of distances constant k, the coordinate B of master base station0(x0,y0) and i-th base station coordinate Bi(xi,yi) acquire
The specific calculating of locus circle where signal source S (x, y) is as follows：
λ in above formulaiSquare of ratio of distances constant, arrange locus circle normal equation：
The center of circle is：
Radius is：
In formula, di0Distance for i-th base station to master base station.
4. according to a kind of signal source localization method suitable for electromagnetic spectrum monitoring system of claim 1-3 any one of them,
It is characterized in that：In step 4, the specific selection principle of signal source position is calculated according to the geometrical relationship of two locus circles：
If there are two intersection points for two locus circles acquired, distance is taken to participate in the friendship of the sum of the distance minimum of three base stations of operation
Point is as source location；
If two locus circles acquired do not have intersection point, acquire with a point of the sum of the distance minimum of two locus circles as letter
Number source position；
If only there are one intersection points for two locus circles acquired, this intersection point is source location.
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Cited By (1)
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