CN110139303A - A kind of rapid simulation method and device of equivalent signal grade TOA measurement - Google Patents
A kind of rapid simulation method and device of equivalent signal grade TOA measurement Download PDFInfo
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- CN110139303A CN110139303A CN201910326656.5A CN201910326656A CN110139303A CN 110139303 A CN110139303 A CN 110139303A CN 201910326656 A CN201910326656 A CN 201910326656A CN 110139303 A CN110139303 A CN 110139303A
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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
- G01S5/04—Position of source determined by a plurality of spaced direction-finders
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/06—Testing, supervising or monitoring using simulated traffic
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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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- Computer Networks & Wireless Communication (AREA)
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- Physics & Mathematics (AREA)
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- Radar, Positioning & Navigation (AREA)
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- Mobile Radio Communication Systems (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
Abstract
The invention discloses the rapid simulation methods and device of a kind of equivalent signal grade TOA measurement, which comprises step 1, is emulated by signal grade TOA algoritic module, obtains the relationship of signal reception power and TOA；Step 2, signal reception power is calculated according to the signal transmission power of target and TOA estimated value is calculated using the relationship of signal reception power and TOA.The present invention emulates the relationship for obtaining signal reception power and TOA by algoritic module, in system emulation, TOA estimated value is directly obtained by relationship, it no longer carries out signal transmitting and receives simulation process process, it is calculated so as to avoid a large amount of, it effectively solves the problems, such as that multipoint location system grade simulation velocity is slow, in the case where not losing overall performance, is conducive to the fast verification of system index.
Description
Technical field
The present invention relates to multipoint positioning technical field, especially a kind of rapid simulation method of equivalent signal grade TOA measurement
And device.
Background technique
Multipoint positioning technology is currently the hot spot studied both at home and abroad, and wherein signal TOA measurement accuracy directly determines
The precision of multipoint location system generally carries out TOA measurement and estimation by generating digital signal at present, and referred to as signal grade is imitative
Very, which is to carry out the process of proof of algorithm, alternatively referred to as algoritic module simulation process, but this method is relatively specific for list
The verifying of a platform single target signal TOA algorithm；When carrying out multipoint location system emulation, TOA algorithm is become by single target
At multiple targets, website becomes multiple websites by single website, and system also needs to consider synchronization, clock drift, step station battle array between station
The influence of the other factors such as type, step station error, while needing to increase other various complicated algorithm verifyings of multipoint location system, fortune
Calculation amount is much more much larger than single goal list bracket signal TOA algorithm, if using letter for the effect for observing entire analogue system
The method of number grade emulation generally require it is equal for a long time, be unfavorable for the operational effect of RES(rapid evaluation system) entirety.
Summary of the invention
The technical problems to be solved by the present invention are: for a long time for method needs for using signal-level simulation etc., no
Conducive to RES(rapid evaluation system) entirety operational effect the problem of, a kind of equivalent signal grade TOA rapid simulation method of measurement is provided
And device.
The technical solution adopted by the invention is as follows:
A kind of rapid simulation method of equivalent signal grade TOA measurement, comprising:
Step 1, it is emulated by signal grade TOA algoritic module, obtains the relationship of signal reception power and TOA；
Step 2, signal reception power is calculated according to the signal transmission power of target, utilizes signal reception power and TOA
TOA estimated value is calculated in relationship.
Further, step 1 specifically includes:
(1) algorithm simulated model of equivalent signal grade TOA measurement is established；
(2) based on the algorithm simulated model of foundation, using signal reception power as independent variable, TOA error is dependent variable progress
The Caro of illiteracy emulates, and obtains the TOA root-mean-square error under unlike signal reception power；
(3) the TOA root-mean-square error under power is received by statistics unlike signal, obtains signal reception power and TOA
Relationship；
(4) according to the relationship of signal reception power and TOA, signal reception power and TOA are determined by nonlinear fitting
Relationship:
TOAi=ζ (Pi)=A*Pi 3+B*Pi 2+C*Pi 1+D
Wherein, TOAiIndicate the measurement result of i-th TOA, PiIndicate signal reception power, the value of parameter A, B, C, D by
Matlab is obtained by nonlinear fitting.
Further, the TOA Measurement Algorithm simulation model for establishing equivalent signal grade TOA measurement is needed according to signal waveform
Feature is designed.
Further, step 2 specifically includes:
(1) according to objective emission power PTWith channel loss LPCalculate signal reception power PR: PR=PT-LP；
(2) relationship for utilizing signal reception power and TOA, by signal reception power PRTOA estimation is calculated
Value.
Further, the channel loss LPIt include: path loss Ld, shadow fading Ls, multipath fading Lmpath: LP=Ld+
Ls+Lmpath。
Further, the path loss LdCalculation formula are as follows: Ld=32.4+20lgf+20lgd, wherein d is target
It is closed flat the distance between platform with detecing, f is carrier frequency.
Further, the shadow fading LsIt is in the stochastic variable X of logarithm normal distribution with a probability densityσIt describes,
XσMean value is 0, standard deviation σ.
Further, the multipath fading LmpathIt is in rayleigh distributed or L-S distribution stochastic variable Y with a probability densityμ
It describes, YμMean value is 0, standard deviation μ.
Further, when measuring the TOA of multi-signal type, a signal is respectively corresponded to every kind of signal type and is received
The mathematic(al) representation of power and TOA；According to the mathematic(al) representation of unlike signal type corresponding signal reception power and TOA, divide
The TOA estimated value that unlike signal type is calculated is not carried out.
A kind of high-speed simulation device of equivalent signal grade TOA measurement, comprising:
Algorithm simulating module obtains the number of signal reception power and TOA for emulating by signal grade TOA algoritic module
Learn relational expression；
System simulation module is received for calculating signal reception power according to the signal transmission power of target using signal
TOA estimated value is calculated in the relationship of power and TOA.
In conclusion by adopting the above-described technical solution, the beneficial effects of the present invention are:
The present invention emulates the relationship for obtaining signal reception power and TOA by algoritic module, in system emulation,
TOA estimated value is directly obtained by relationship, no longer progress signal transmitting receives simulation process process, so as to avoid a large amount of
It calculates, by experiment, the rapid simulation method (emulation of abbreviation functional level) of equivalent signal grade TOA measurement of the invention is than signal grade
Fast 50 times of simulation measuring method speed or more, this method is not while influencing simulated effect, the fast lifting emulation of system
Speed effectively solves the problems, such as that multipoint location system grade simulation velocity is slow, in the case where not losing overall performance, is conducive to
The fast verification of system index.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the flow chart for the rapid simulation method that equivalent signal grade TOA of the invention is measured.
Fig. 2 is signal-level simulation and functional level the Realization of Simulation Structure Comparison figure of the invention.
Fig. 3 is nonlinear fitting signal reception power and TOA accuracy relation figure.
Fig. 4 is relational graph between signal reception power and target range in the case of ideal path loss.
Fig. 5 is relational graph between signal reception power and target range under channel circumstance.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, not
For limiting the present invention, i.e., described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is logical
The component for the embodiment of the present invention being often described and illustrated herein in the accompanying drawings can be arranged and be designed with a variety of different configurations.
Therefore, claimed invention is not intended to limit to the detailed description of the embodiment of the present invention provided in the accompanying drawings below
Range, but be merely representative of selected embodiment of the invention.Based on the embodiment of the present invention, those skilled in the art are not having
Every other embodiment obtained under the premise of creative work is made, shall fall within the protection scope of the present invention.
Feature and performance of the invention are described in further detail with reference to embodiments.
Embodiment 1
The present embodiment is by taking ADS-B signal as an example, other signals such as S mode inquiry answer signal, M3A/C inquiry response letter
Number, DME inquiry answer signal can be verified in this way.A kind of equivalent signal grade TOA measurement provided in this embodiment
Rapid simulation method, as shown in Figure 1, comprising:
Step 1, algoritic module emulates: being emulated by signal grade TOA algoritic module, obtains signal reception power and TOA
Relationship:
(1) it establishes the algorithm simulated model of equivalent signal grade TOA measurement: being designed according to the characteristics of signal waveform.Mesh
The relatively common algorithm of preceding multipoint positioning includes: pulse front edge TOA Measurement Algorithm, pulse matching filtering TOA Measurement Algorithm, pulse
Difference matched filtering TOA Measurement Algorithm etc..The present embodiment ADS-B signal mainly uses pulse matching filtering TOA measurement and calculates
Method, the Realization of Simulation process is as shown in signal-level simulation process in Fig. 2.
(2) based on the algorithm simulated model of foundation, signal generator module, signal receiving module, TOA are write using Matlab
Algorithm measurement module, using signal reception power as independent variable, TOA error is the Caro emulation that dependent variable is covered, and is obtained different
TOA root-mean-square error under signal reception power.Carry out the assessment formula of the TOA root-mean-square error of n times emulation are as follows:
ADS-B signal is emulated in -90dBm~-50dBm power bracket using the Caro that 5dBm power is covered as stepping,
It is that 1000, TOA root-mean-square error is as shown in Figure 3 in the times N of each power points emulation.
(3) the TOA root-mean-square error under power is received by statistics unlike signal, obtains signal reception power and TOA
Relationship:
(4) according to the relationship of signal reception power and TOA, signal reception power and TOA are determined by nonlinear fitting
Relationship:
TOAi=ζ (Pi)=A*Pi 3+B*Pi 2+C*Pi 1+D
Wherein, TOAiIndicate the measurement result of i-th TOA, PiIndicate signal reception power, the value of parameter A, B, C, D by
Matlab is obtained by nonlinear fitting, the effect of nonlinear fitting such as shown in solid in Fig. 3.
Step 2, system emulation: calculating signal reception power according to the signal transmission power of target, receives function using signal
TOA estimated value is calculated in the relationship of rate and TOA.
(1) according to objective emission power PTWith channel loss LPCalculate signal reception power PR: PR=PT-LP；
It is closed flat platform reception echo signal by detecing, the signal transmission power of target is assumed to be PTIt is L with channel lossP, channel
L is lostPIt include: path loss Ld, shadow fading Ls, multipath fading Lmpath:
LP=Ld+Ls+Lmpath
Signal, the path loss L are monitored for aviationdCalculation formula are as follows:
Ld=32.4+20lgf+20lgd
Wherein, d is that target and detecing is closed flat the distance between platform (unit K M), and f is carrier frequency (unit MHz).This implementation
Example measurement ADS-B signal is under ideal pathloss situation, signal reception power PRIt is as shown in Figure 4 with the relationship of target range d.
As seen from the figure, it with the increase of distance, receives power and is gradually reduced, it is constant when relationship is, one-to-one.
The shadow fading LsProbability density function obey logarithm normal distribution, with a probability density be in lognormal
The stochastic variable X of distributionσIt describes, XσMean value is 0, standard deviation σ.
The multipath fading LmpathProbability density function Rayleigh distributed or L-S distribution, be in a probability density
Rayleigh distributed or L-S distribution stochastic variable YμIt describes, YμMean value is 0, standard deviation μ.
In conclusion signal reception power PRIt indicates are as follows:
PR=PT-LP=PT-(Ld-Xσ-Yμ)
The channel loss L of the present embodiment measurement ADS-B signalPWhen, signal reception power PRSuch as with the relationship of target range d
Shown in Fig. 5.As seen from the figure, with the increase of distance, the relationship for receiving power and target range is nonlinear and time-varying.
(2) relationship for utilizing signal reception power and TOA, by signal reception power PRTOA estimation is calculated
Value.The signal reception power P that will be calculatedRThe relationship for substituting into signal reception power and TOA, calculates the target position
The TOA estimated value set realizes the TOA measurement of echo signal.
Based on the rapid simulation method of above-mentioned equivalent signal grade TOA measurement, the present embodiment also provides a kind of equivalent signal grade
The high-speed simulation device of TOA measurement, comprising:
Algorithm simulating module obtains the number of signal reception power and TOA for emulating by signal grade TOA algoritic module
Learn relational expression；
System simulation module is received for calculating signal reception power according to the signal transmission power of target using signal
TOA estimated value is calculated in the relationship of power and TOA.
The operational process of functional module in the high-speed simulation device of equivalent signal grade TOA measurement is by above-mentioned equivalent letter
The process description of the rapid simulation method of number grade TOA measurement is illustrated, and details are not described herein.
Realization process according to the method for the present invention obtains signal reception function it is recognised that the present invention is emulated by algoritic module
The relationship of rate and TOA directly obtains TOA estimated value by relationship in system emulation, no longer progress signal hair
It penetrates and receives simulation process process, calculated so as to avoid a large amount of, by experiment, equivalent signal grade TOA of the invention is measured fast
Than fast 50 times of signal-level simulation measurement method speed or more, this method is not influencing to imitate fast emulation mode (emulation of abbreviation functional level)
While true effect, the fast lifting simulation velocity of system, effectively solution multipoint location system grade simulation velocity is slow is asked
Topic, in the case where not losing overall performance, is conducive to the fast verification of system index.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (10)
1. a kind of rapid simulation method of equivalent signal grade TOA measurement characterized by comprising
Step 1, it is emulated by signal grade TOA algoritic module, obtains the relationship of signal reception power and TOA；
Step 2, signal reception power is calculated according to the signal transmission power of target, utilizes the mathematics of signal reception power and TOA
TOA estimated value is calculated in relational expression.
2. the rapid simulation method of equivalent signal grade TOA measurement as described in claim 1, which is characterized in that step 1 is specifically wrapped
It includes:
(1) algorithm simulated model of equivalent signal grade TOA measurement is established；
(2) based on the algorithm simulated model of foundation, using signal reception power as independent variable, TOA error is what dependent variable was covered
Caro emulation obtains the TOA root-mean-square error under unlike signal reception power；
(3) the TOA root-mean-square error under power is received by statistics unlike signal, obtains the relationship of signal reception power and TOA；
(4) according to the relationship of signal reception power and TOA, signal reception power and the mathematics of TOA are determined by nonlinear fitting
Relational expression:
TOAi=ζ (Pi)=A*Pi 3+B*Pi 2+C*Pi 1+D
Wherein, TOAiIndicate the measurement result of i-th TOA, PiIndicate signal reception power, the value of parameter A, B, C, D are by Matlab
It is obtained by nonlinear fitting.
3. the rapid simulation method of equivalent signal grade TOA measurement as claimed in claim 2, which is characterized in that establish equivalent letter
The TOA Measurement Algorithm simulation model needs of number grade TOA measurement are designed according to the characteristics of signal waveform.
4. the rapid simulation method of equivalent signal grade TOA measurement as described in claim 1, which is characterized in that step 2 is specifically wrapped
It includes:
(1) according to objective emission power PTWith channel loss LPCalculate signal reception power PR: PR=PT-LP；
(2) relationship for utilizing signal reception power and TOA, by signal reception power PRTOA estimated value is calculated.
5. the rapid simulation method of equivalent signal grade TOA measurement as claimed in claim 4, which is characterized in that the channel damage
Consume LPIt include: path loss Ld, shadow fading Ls, multipath fading LmpatH:LP=Ld+Ls+Lmpath。
6. the rapid simulation method of equivalent signal grade TOA measurement as claimed in claim 5, which is characterized in that the path damage
Consume LdCalculation formula are as follows: Ld=32.4+20lgf+20lgd, wherein d is target and detects and be closed flat the distance between platform, and f is carrier wave
Frequency.
7. the rapid simulation method of equivalent signal grade TOA measurement as claimed in claim 5, which is characterized in that the shade declines
Fall LsIt is in the stochastic variable X of logarithm normal distribution with a probability densityσIt describes, XσMean value is 0, standard deviation σ.
8. the rapid simulation method of equivalent signal grade TOA measurement as claimed in claim 5, which is characterized in that the multipath declines
Fall LmpathIt is in rayleigh distributed or L-S distribution stochastic variable Y with a probability densityμIt describes, YμMean value is 0, standard deviation μ.
9. the rapid simulation method of equivalent signal grade TOA measurement as described in claim 1, which is characterized in that multi-signal
When the TOA measurement of type, the mathematic(al) representation of a signal reception power and TOA is respectively corresponded to every kind of signal type；According to
The mathematic(al) representation of unlike signal type corresponding signal reception power and TOA is respectively calculated to obtain unlike signal type
TOA estimated value.
10. a kind of high-speed simulation device of equivalent signal grade TOA measurement characterized by comprising
Algorithm simulating module, for being emulated by signal grade TOA algoritic module, the mathematics for obtaining signal reception power and TOA is closed
It is formula；
System simulation module utilizes signal reception power for calculating signal reception power according to the signal transmission power of target
With the relationship of TOA, TOA estimated value is calculated.
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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 |
| WO2021088344A1 (en) * | 2019-11-07 | 2021-05-14 | 南京莱斯电子设备有限公司 | Simulation test method for multi-point positioning system |
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