CN108535690A - A kind of signal matching method of multipoint positioning scene monitoring system - Google Patents

A kind of signal matching method of multipoint positioning scene monitoring system Download PDF

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CN108535690A
CN108535690A CN201810313528.2A CN201810313528A CN108535690A CN 108535690 A CN108535690 A CN 108535690A CN 201810313528 A CN201810313528 A CN 201810313528A CN 108535690 A CN108535690 A CN 108535690A
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station
secondary station
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CN108535690B (en
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王俐
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Guizhou Institute of Technology
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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
    • G01S5/06—Position of source determined by co-ordinating a plurality of position lines defined by path-difference measurements

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Position Fixing By Use Of Radio Waves (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

The invention discloses a kind of signal matching method of multipoint positioning scene monitoring system, step includes：The position at measuring center station and multiple secondary station calculates distance and the time difference of the central station to secondary station；Central station receives the answer signal of target with secondary station, and data are packaged and mark timestamp；Secondary station transmits data packet to central station, and data are handled in central station；Choose secondary station data packet identical with central station timestamp；Consider that answer signal reaches the time of central station, calculates the time range that signal reaches secondary station；The time range that answer signal reaches secondary station intersects with the time of arrival (toa) range recorded in secondary station data packet, when intersection is not equal to zero, the successful matching of the signal time difference compares consistent signal successful matching to the signal contrast signal mode and coding of time difference successful matching.The method of the present invention can rapidly match the signal of central station and secondary station, improve signal and be paired into power, under the premise of ensureing to position real-time, improve system accuracy and validity.

Description

A kind of signal matching method of multipoint positioning scene monitoring system
Technical field
The present invention relates to airport scene monitoring technical field more particularly to a kind of signals of multipoint positioning scene monitoring system Matching method.
Background technology
Multipoint positioning airport scene monitoring system near airports by arranging that far-end unit receives aircarrier aircraft or airport The transponder pulse signal of vehicle, far-end unit carry out answer signal decoding using the signal received, measure each unit reception To the arrival time of signal, and the spatial position of target is calculated using the reaching time-difference of multiple far-end units, airport is provided Airbound target position in ground and neighbouring spatial domain, can solve the problems, such as scene monitoring system it is intrinsic without mark and airport Coverage hole problem, realize being accurately positioned and identifying to aircraft of airport area, improve the scene monitoring ability of busy airport, carry The safety on high airport.
Multipoint positioning airport scene monitoring system is positioned using reaching time-difference principle, when two-dimensional localization, need to Few three receiving units when three-dimensional localization, need at least four receiving units, and in view of multipath, atural object are anti-in practical application The quantity of the problems such as penetrating and blocking, receiving unit is generally more.When monitoring system to multiple targets position in airport when, In order to solve the problems, such as location ambiguity, needing the transponder pulse signal progress received to multiple far-end units, accurately association matches, Ensure to position data source used in same target.
In the practical application of multipoint positioning scene monitoring system, the signal of arrival time, signal mode and coding is utilized Matching method makes the successful match rate that at least three far-end units receive signal be improved, and then is ensureing to position real-time Under the premise of, improve system accuracy and validity.
Invention content
The goal of the invention of the present invention is：In view of the above problems, a kind of multi-site signal exact correlation is provided Method of completing the square to improve Signal Matching success rate, and then improves system accuracy and validity.
A kind of signal matching method of multipoint positioning scene monitoring system proposed by the present invention, this method step include：
1) position at measuring center station and M secondary station, the distance and time difference Δ t of calculating central station to secondary station；
2) central station receives the answer signal of target with secondary station, and data are packaged and mark timestamp；
3) secondary station transmits data packet to central station, and data are handled at central station；
4) secondary station data packet identical with central station timestamp is chosen；
5) consider that answer signal reaches the time of central station, calculate the time range that signal reaches secondary station；
6) time range of answer signal arrival secondary station intersects with the time of arrival (toa) range recorded in secondary station data packet, Intersection is not
When equal to zero, the successful matching of the signal time difference compares the signal contrast signal mode and coding of time difference successful matching One
The signal successful matching of cause.
More specifically, in the step 2)：N number of signal data in 1 second is packaged by central station respectively with secondary station, letter Number format is made of signal serial number, pattern, coding and arrival time (TOA).
More specifically, in the step 3)：It is first by TOA to signal in central station and the identical data packet of secondary station timestamp After arrange serial number.
More specifically, in the step 5)：The arrival time of target response signal to central station and secondary station is respectively TOAIt is mainAnd TOAIt is secondary, there are time difference Δ t for central station to secondary stationi, therefore signal reach secondary station time meet TOAMain n-Δti＜ TOASecondary i＜ TOAMain n+Δti, the signal serial number for data of standing centered on wherein n (n=1,2 ... N), i (i=1,2 ... M) is secondary station Serial number.
More specifically, in the step 6)：Obtain the maximum value P of signal TOA in secondary station data packetmaxAnd minimum value Pmin, the 1st signal in central station data packet is matched with the signal of secondary station i respectively first, is reached further according to the answer signal Time range (the TOA of secondary stationMain n-Δti, TOAMain n+Δti) and PmaxAnd PminIt is compared：
1) as (TOAMain n+Δti) ＜ Pmin, or (TOAMain n-Δti) ＞ PmaxWhen, signal pairing is unsuccessful；
2) as (TOAMain n+Δti)≤PmaxAnd (TOAMain n-Δti)≥PminWhen, central station TOAMain nWith secondary station TOA ranges (TOAMain n-Δti, TOAMain n+Δti) in the 1st signal carry out time difference pairing, then contrast signal pattern and coding compare consistent Then signal successful matching；
3) as (TOAMain n+Δti)≥PmaxAnd (TOAMain n-Δti)≤PminWhen, central station TOAMain nWith secondary station TOA ranges [Pmin,Pmax] in the 1st signal carry out time difference pairing, then contrast signal pattern and coding compare consistent then signal and are paired into Work(；
4) as (TOAMain n+Δti)≤PmaxAnd (TOAMain n-Δti)≤PminWhen, central station TOAMain nWith secondary station TOA ranges [Pmin, TOAMain n+Δti] in the 1st signal carry out time difference pairing, then contrast signal pattern and coding compare consistent then signal Successful matching；
5) as (TOAMain n+Δti)≥PmaxAnd (TOAMain n-Δti)≥PminWhen, central station TOAMain nWith secondary station TOA ranges [TOAMain n-Δti, Pmax] in the 1st signal carry out time difference pairing, then contrast signal pattern and coding compare consistent then signal Successful matching.
If 6) the 1st signal successful matching of central station, central station and multiple secondary station signals of successful matching are stamped into mark, It is no longer participate in follow-up pairing, otherwise first signal pairing of central station is unsuccessful, stamps pairing invalidated identification；
7) the 2nd signal ... of central station, the pairing of n-th signal repeat the above process.
The answer signal that the method for the invention can fast and effeciently receive multiple websites matches, and reduces meter Calculation amount, to ensure that system positions real-time.
Description of the drawings
Fig. 1 is the flow chart of multipoint positioning scene monitoring system signal matching method proposed by the present invention.
Fig. 2 is that the signal that step 105 illustrates shown in Fig. 1 reaches the time range schematic diagram of secondary station.
Fig. 3 is the experimental result schematic diagram of four station positioning systems of embodiment of the present invention.
Specific implementation mode
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with the attached drawing in the present invention, to this Technical solution in invention is clearly and completely described.Based on the method in the present invention, those of ordinary skill in the art are not having There is the every other method obtained under the premise of making creative work, shall fall within the protection scope of the present invention.
Fig. 1 is the flow chart of multipoint positioning scene monitoring system signal matching method of the present invention, the party as shown in the figure Method includes the following steps：
Step 101, the position at measuring center station and M secondary station, the distance and time difference Δ t of calculating central station to secondary station.
Step 102, central station receives the answer signal of target with secondary station, and data are packaged and mark timestamp.
Wherein, N number of signal data in 1 second is packaged by the central station respectively with secondary station, and signal format is by signal sequence Number, pattern, coding and arrival time (TOA) composition.
Step 103, secondary station transmits data packet to central station, and data are handled at central station.
Step 104, secondary station data packet identical with central station timestamp is chosen.
Wherein, to signal in the central station and the identical data packet of secondary station timestamp by TOA successively arrangement serial number.
Step 105, consider that answer signal reaches the time of central station, calculate the time range that signal reaches secondary station.
As shown in Fig. 2, the arrival time of target response signal to central station and secondary station is respectively TOAIt is mainAnd TOAIt is secondary, central station To secondary station, there are time difference Δ ti, according to the relationship for the triangle edges that central station, secondary station and monitoring target are formed, signal can be obtained The time for reaching secondary station meets TOAMain n-Δti＜ TOASecondary i＜ TOAMain n+Δti, station data centered on wherein n (n=1,2 ... N) Signal serial number, i (i=1,2 ... M) are secondary station serial number.
Step 106, answer signal reaches the time of arrival (toa) model recorded in time range and the secondary station data packet of secondary station Intersection is enclosed, when intersection is not equal to zero, the successful matching of the signal time difference.
The maximum value P of signal TOA in secondary station data packet is obtained according to step 104maxWith minimum value Pmin, first to central station The 1st signal is matched with the signal of secondary station i respectively in data packet, and the time of secondary station is reached according to answer signal described in step 105 Range (TOAMain n-Δti, TOAMain n+Δti) and PmaxAnd PminIt is compared：
1) as (TOAMain n+Δti) ＜ Pmin, or (TOAMain n-Δti) ＞ PmaxWhen, signal pairing is unsuccessful；
2) as (TOAMain n+Δti)≤PmaxAnd (TOAMain n-Δti)≥PminWhen, central station TOAMain nWith secondary station TOA ranges (TOAMain n-Δti, TOAMain n+Δti) in the 1st signal carry out time difference pairing, then contrast signal pattern and coding compare consistent Then signal successful matching；
3) as (TOAMain n+Δti)≥PmaxAnd (TOAMain n-Δti)≤PminWhen, central station TOAMain nWith secondary station TOA ranges [Pmin,Pmax] in the 1st signal carry out time difference pairing, then contrast signal pattern and coding compare consistent then signal and are paired into Work(；
4) as (TOAMain n+Δti)≤PmaxAnd (TOAMain n-Δti)≤PminWhen, central station TOAMain nWith secondary station TOA ranges [Pmin, TOAMain n+Δti] in the 1st signal carry out time difference pairing, then contrast signal pattern and coding compare consistent then signal Successful matching；
5) as (TOAMain n+Δti)≥PmaxAnd (TOAMain n-Δti)≥PminWhen, central station TOAMain nWith secondary station TOA ranges [TOAMain n-Δti, Pmax] in the 1st signal carry out time difference pairing, then contrast signal pattern and coding compare consistent then signal Successful matching.
If 6) the 1st signal successful matching of central station, central station and multiple secondary station signals of successful matching are stamped into mark, It is no longer participate in follow-up pairing, otherwise first signal pairing of central station is unsuccessful, stamps pairing invalidated identification；
7) the 2nd signal ... of central station, the pairing of n-th signal repeat process described in step 105 and step 106.
Below by the attainable technique effect of description of test present invention institute.
It is disposed about a central station in field experiment and three secondary station receive target response signal, signal source emits response mould Quasi- signal, Fig. 3 show the result schematic diagram of the signal successful matching of four receiving stations, and signal mode 160 indicates answer signal For Mode A, and signal successfully match after calculate the signal arrival time difference of central station and each secondary station, the experimental results showed that this hair It is bright to be efficiently used for multipoint system positioning.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention All any modification, equivalent and improvement etc., should all be included in the protection scope of the present invention made by within refreshing and principle.

Claims (5)

1. a kind of signal matching method of multipoint positioning scene monitoring system, which is characterized in that step includes：
1) position at measuring center station and M secondary station, the distance and time difference Δ t of calculating central station to secondary station；
2) central station receives the answer signal of target with secondary station, and data are packaged and mark timestamp；
3) secondary station transmits data packet to central station, and data are handled at central station；
4) secondary station data packet identical with central station timestamp is chosen；
5) consider that answer signal reaches the time of central station, calculate the time range that signal reaches secondary station；
6) time range of answer signal arrival secondary station intersects with the time of arrival (toa) range recorded in secondary station data packet, intersection When not equal to zero, the successful matching of the signal time difference compares consistent the signal contrast signal mode and coding of time difference successful matching Signal successful matching.
2. according to the method described in claim 1, it is characterized in that, in the step (2)：Central station is with secondary station respectively by 1 second Interior N number of signal data is packaged, and signal format is made of signal serial number, pattern, coding and arrival time (TOA).
3. according to the method described in claim 2, it is characterized in that, in the step (3)：To central station and secondary station timestamp phase Signal is by TOA successively arrangement serial number in same data packet.
4. according to the method described in claim 3, it is characterized in that, in the step (5)：Target response signal to central station and The arrival time of secondary station is respectively TOAIt is mainAnd TOAIt is secondary, there are time difference Δ t for central station to secondary stationi, therefore signal reach secondary station when Between meet TOAMain n-Δti＜ TOASecondary i＜ TOAMain n+Δti, the signal serial number for data of standing centered on wherein n (n=1,2 ... N), i (i =1,2 ... M) it is secondary station serial number.
5. according to the method described in claim 4, it is characterized in that, in the step (6)：It obtains according to claim 3 The maximum value P of signal TOA in secondary station data packetmaxWith minimum value Pmin, first to the 1st signal in central station data packet respectively with The signal of secondary station i matches, and then answer signal reaches the time range (TOA of secondary station according to claim 4Main n-Δti, TOAMain n+Δti) and PmaxAnd PminIt is compared：
1) as (TOAMain n+Δti) ＜ Pmin, or (TOAMain n-Δti) ＞ PmaxWhen, signal pairing is unsuccessful；
2) as (TOAMain n+Δti)≤PmaxAnd (TOAMain n-Δti)≥PminWhen, central station TOAMain nWith secondary station TOA ranges (TOAMain n-Δti, TOAMain n+Δti) in the 1st signal carry out time difference pairing, then contrast signal pattern and coding compare consistent Then signal successful matching；
3) as (TOAMain n+Δti)≥PmaxAnd (TOAMain n-Δti)≤PminWhen, central station TOAMain nWith secondary station TOA ranges [Pmin, Pmax] in the 1st signal carry out time difference pairing, then contrast signal pattern and coding compare consistent then signal successful matching；
4) as (TOAMain n+Δti)≤PmaxAnd (TOAMain n-Δti)≤PminWhen, central station TOAMain nWith secondary station TOA ranges [Pmin, TOAMain n+Δti] in the 1st signal carry out time difference pairing, then contrast signal pattern and coding compare consistent then signal and are paired into Work(；
5) as (TOAMain n+Δti)≥PmaxAnd (TOAMain n-Δti)≥PminWhen, central station TOAMain nWith secondary station TOA ranges [TOAMain n-Δti, Pmax] in the 1st signal carry out time difference pairing, then contrast signal pattern and coding compare consistent then signal Successful matching；
If 6) the 1st signal successful matching of central station, central station and multiple secondary station signals of successful matching are stamped into mark, no longer Follow-up pairing is participated in, otherwise first signal pairing of central station is unsuccessful, stamps pairing invalidated identification；
7) the 2nd signal ... of central station, the pairing of n-th signal, specific method are：Repeat the mistake of the 1st signal pairing Journey.
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CN112105089A (en) * 2020-09-21 2020-12-18 电子科技大学 Communication signal correlation method based on response time probability distribution
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CN110261817A (en) * 2019-04-26 2019-09-20 安徽四创电子股份有限公司 A kind of matching method for Distributed Multi positioning monitoring system
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CN112105089B (en) * 2020-09-21 2022-08-23 电子科技大学 Communication signal correlation method based on response time probability distribution
CN113589225A (en) * 2021-07-29 2021-11-02 四川九洲电器集团有限责任公司 Aerial target positioning method and device

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