CN109188374A - Complicated radar overall pulse number production method based on most prepulse - Google Patents
Complicated radar overall pulse number production method based on most prepulse Download PDFInfo
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Abstract
The present invention relates to technical field of system simulation, disclose a kind of complicated radar overall pulse number production method based on most prepulse.Including following procedure: first arrival pulse in radar signal pulse sequence being defined as the radar signal most prepulse, finds the radar signal most prepulse reached at first in simulated scenario；The describing word parameter for reaching radar signal most prepulse at first is saved in interlaced pulse list to be output, calculates and generates interlaced pulse；Update the forward position arrival time of radar signal most prepulse；For Radar Signal Transmission delay time, the forward position arrival time of radar signal most prepulse is corrected；Update the PDW parameter of radar signal most prepulse；Dynamic, which has been calculated, helps pulse digit generation.Whether the present invention has comprehensively considered radar antenna scanning and has generated to pulse and influence to pulse arrival time of the influence of impulse amplitude size, electromagnetic wave space propagation delay time, has the characteristics that scalability is strong, simulation fidelity is high, arithmetic speed is fast.
Description
Technical field
The present invention relates to technical field of system simulation, especially a kind of complicated radar overall pulse based on most prepulse
Digital production method.
Background technique
The dependence to environment is trained due to the complexity and electronic counter-measures equipment of modern battlefield electromagnetic environment, it is necessary to
Realize the radar signal scenario simulation of complicated system, different closenesses.Current radar signal waveform modeling pattern mainly has feature
Parameter mode and two kinds of pulse train mode.Wherein, characteristic parameter mode is according to radar signal pattern, by each emulation beat
All pulses that interior every radar signals generate are described by characteristic parameter, which computationally has super real-time
Advantage, but it is only capable of the emulation of support function grade, verisimilitude is poor；And pulse train mode can be realized to true interlaced pulse sequence
Realistic simulation is carried out, pulse grade can be supported to emulate, but the modeling pattern can generate a large amount of overall pulse data, and can dynamic realtime
Increase, sort algorithm is complicated, computationally intensive, it is difficult to simulate generation in real time by business computer, often need through DSP come real
It is existing.
In view of the above problems, currently having also been proposed arteries and veins group parameter mode, which is a kind of classified statistic description side
Formula, all pulses that every radar signals in each emulation beat generate are respectively seen as one group by it has general pulse characteristic
Signal, its main feature is that every radar signals group intrinsic parameter does not change, and carrier frequency, repetition interval and pulsewidth etc. between group and group
Characteristic parameter is alterable.The modeling pattern performance is between characteristic parameter mode and pulse train mode, due to thunder in organizing
It is accordingly to be regarded as general pulse up to signal, so the realization of its sort algorithm is relatively simple, but since the limitation of emulation beat (is difficult to
Reach Microsecond grade), it can not support the overall pulse simulation of the complicated system signal such as frequency agility, frequency hopping.
In addition, existing radar signal waveform modeling pattern majority does not consider the delay of radar signal space propagation to overall pulse
The influence of generation causes the cross pulse verisimilitude generated not good enough.
Therefore, currently in terms of the multi-section radar overall pulse number of complicated system difference closeness generates research, there are still
The problems such as sort algorithm is complicated, computationally intensive, verisimilitude is not good enough, needs continuous exploratory development.
Summary of the invention
The technical problems to be solved by the present invention are: in view of the above problems, provide a kind of based on most prepulse
Complicated radar overall pulse number production method.
The technical solution adopted by the invention is as follows: a kind of complicated radar overall pulse number based on most prepulse generates
Method specifically includes following procedure: step 1, first arrival pulse in radar signal pulse sequence being defined as the radar
Signal most prepulse finds the radar signal most prepulse reached at first in simulated scenario；Step 2, radar letter will be reached at first
The describing word parameter of number most prepulse is saved in interlaced pulse list to be output, is calculated and is generated interlaced pulse；Step 3, more
The forward position arrival time of new radar signal most prepulse；Step 4, for Radar Signal Transmission delay time, radar signal is corrected
The forward position arrival time of most prepulse；Step 5, the PDW parameter of radar signal most prepulse is updated；Step 6, dynamic, which calculates, completes
Overall pulse is digitally generated.
Further, the detailed process of the step 1 are as follows: step 11, first in radar signal pulse sequence is arrived
The most prepulse of the radar signal is defined as up to pulse, the describing word parameter of the most prepulse includes that the forward position of most prepulse is arrived
Up to time TOAi, carrier frequency RFi, pulse repetition period PRIi, pulse width PWi, impulse amplitude PAi, wherein i=0,1 ..., ∞,
It is the number of radar signal；Step 12, in calculating simulation scene all radar signals most prepulse forward position arrival time TOAi,
Seek the smallest forward position arrival time TOAj(j ∈ { 0,1 ..., ∞ }), corresponding radar signal j is the radar signal reached at first
Most prepulse.
Further, in the step 2, the forward position arrival time TOA of radar signal j most prepulsei, carrier frequency RFi, pulse
Repetition period is PRIi, pulse width PWi, impulse amplitude PAiIt is saved among interlaced pulse list to be output, completes TOAj
All interlaced pulses before moment, which calculate, to be generated.
Further, the detailed process of the step 3 are as follows: step 31, according toWherein, k is current PRF number, when k ∈ { 0,1 ..., ∞ }, k=0 pair
Answer the most prepulse of radar signal j；TOAJ, 0The forward position arrival time of pulse, i.e. radar signal j may be reached for the 0th most
The forward position arrival time TOA of prepulsej；TOAJ, k+1、TOAJ, kWhen respectively kth, the k+1 forward positions that may reach pulse reach
Between；PRIJ, kFor the time interval between kth, the k+1 pulse that may be reached；Persistently iterative calculation radar signal j is next can
The forward position arrival time TOA for the pulse that can be reachedJ, k+1；Step 32, the TOA of calculating is verifiedJ, k+1Whether iterated conditional is met, when
When radar detection performance is tracking, stopping criterion for iteration is
TOAJ, k< TOAJ, k+1,
When radar detection performance is that circle is swept, stopping criterion for iteration is
When radar detection performance is fan sweeping, stopping criterion for iteration is
Or
Wherein, TjFor radar antenna scan period, W corresponding to radar signal jjIt is wide for wave beam corresponding to radar signal j
Degree, aJ, 1For fan sweeping start angle, a corresponding to radar signal jJ, 2For fan sweeping termination point corresponding to radar signal j, until
Meet stopping criterion for iteration, obtains the forward position arrival time of updated radar signal most prepulse.
Further, the detailed process of the step 4 are as follows: calculate Radar Signal Transmission delay time td=S/c × 103, S
For the distance between radar and radar detection target, c is the light velocity, by the forward position arrival time of radar signal most prepulse plus biography
Defeated delay time obtains the forward position arrival time of revised radar signal most prepulse.
Further, in the step 5, the PDW parameter of the update includes carrier frequency RFj, pulse repetition period PRIj, arteries and veins
Rush width PWj, impulse amplitude PAj, the renewal process that the frequency carries is RFj'=RFj+ Δ RF × Rand (- 1,1), the pulse
The renewal process of repetition period is PRIj'=PRIj+ Δ PRI × Rand (- 1,1), the pulse width PWjIt is constant, the pulse
The renewal process of amplitude is
Wherein, TOA 'j, RFj′、PRIj', PWj′、PAj' be respectively updated radar signal j most prepulse forward position
Arrival time, carrier frequency, pulse repetition period, pulse width, impulse amplitude, RFj、PRIj, PWj、PAjThunder before respectively updating
Up to the carrier frequency of signal j, pulse repetition period, pulse width, impulse amplitude, Rand (- 1,1) indicates to generate in [- 1,1] range
Random number, PattenFor radar signal, signal power decays in free space transmission, and S is between radar and radar detection target
Distance；Y (x) indicates radar directional pattern data, x ∈ [- 180 °, 180 °].
In conclusion by adopting the above-described technical solution, the beneficial effects of the present invention are: most preceding arteries and veins that the present invention uses
Rushing algorithm is a kind of pulse grade emulation, is digitally generated for multi-section complexity radar signal overall pulse, technical side of the invention
Case comprehensively considered radar antenna scanning whether pulse is generated and the influence of impulse amplitude size, electromagnetic wave space transmission when
Prolong the influence to pulse arrival time, compared with traditional algorithm, with scalability is strong, simulation fidelity is high, arithmetic speed is fast
The features such as.It is specific as follows:
A) scalability is strong: the overall pulse that the algorithm is applicable to various complicated radar signals is digitally generated, and can
Quickly upgrade the algorithm to be digitally generated with the overall pulse for being suitable for the emerging new system radar signal in battlefield.The algorithm can refer to
The detailed process of step 5 is additionally increased by way of similar play with building blocks it is not necessary to modify entire algorithm process logic
Add the processing logic branch of corresponding radar signal pattern (pattern including the emerging new system radar signal in battlefield), to update
The PDW parameter of corresponding radar signal most prepulse realizes that the overall pulse of various complicated radar signals is digitally generated.
B) simulation fidelity is high: the algorithm introduces whether radar antenna scanning produces pulse by " step 3 and step 5 "
Raw and impulse amplitude size influence, has modified electromagnetic wave space propagation delay time to pulse arrival time by " step 4 "
It influences, the overall pulse and the overall pulse consistency in true battlefield surroundings for generating emulation are higher.
C) arithmetic speed is fast: for high pulse densities battlefield surroundings (in the battlefield surroundings containing 3 radar signals,
Wherein the pulse repetition period of radar signal 1,2,3 is respectively 2 μ s, 3 μ s, 5 μ s, and impulse density is about 103.3 ten thousand pulse/secs)
Overall pulse is digitally generated, and (Intel (R) Core (TM) 2Quad CPU, Q9650@3.00Hz) is run on general commercial computer
The algorithm is tested, by repeatedly calculating time-consuming test and statistics averaging to the algorithm, obtains every full arteries and veins for calculating and generating 80ms
Punching, about need time-consuming 13.5ms, the test result show the algorithm for overall pulse be digitally generated have the characteristics that it is super real-time.
Detailed description of the invention
Fig. 1 is the flow diagram of the complicated radar overall pulse number production method of the invention in most prepulse.
Specific embodiment
All features disclosed in this specification or disclosed all methods or in the process the step of, in addition to mutually exclusive
Feature and/or step other than, can combine in any way.
Any feature disclosed in this specification unless specifically stated can be equivalent or with similar purpose by other
Alternative features are replaced.That is, unless specifically stated, each feature is an example in a series of equivalent or similar characteristics
?.
Such as Fig. 1, the complicated radar overall pulse number production method of most prepulse specifically includes following procedure:
Step 1, first arrival pulse in radar signal pulse sequence is defined as the radar signal most prepulse, sought
Look for the radar signal reached at first in simulated scenario most prepulse；
Preferably, the detailed process of the step 1 are as follows: step 11, by first arrival in radar signal pulse sequence
Pulse is defined as the most prepulse of the radar signal, before describing word (PDW) parameter of the most prepulse includes most prepulse
Along arrival time TOAi, carrier frequency RFi, pulse repetition period PRIi, pulse width PWi, impulse amplitude PAi, wherein i=0,
1 ..., ∞ is the number of radar signal；Step 12, the forward position of all radar signals most prepulse reaches in calculating simulation scene
Time TOAi, unit is μ s, according to formulaSeek the smallest forward position arrival time TOAj, single
Position is μ s (j ∈ { 0,1 ..., ∞ }, j are all corresponding radar signal numbers of the most prepulse reached at first searched out),
Corresponding radar signal j is the radar signal most prepulse reached at first.
Step 2, describing word (PDW) parameter of radar signal most prepulse will be reached at first (when most prepulse forward position reaches
Between TOAj, carrier frequency RFj, pulse width PWj, impulse amplitude PAj) be saved in interlaced pulse list to be output, it calculates and generates
TOAjInterlaced pulse before moment.And this can be rejected from corresponding radar signal pulse sequence and reach radar signal most at first
Prepulse.
Step 3, the forward position arrival time of radar signal most prepulse is updated；
Preferably, the detailed process of the step 3 are as follows: step 31, according toWherein, k is current PRF number, when k ∈ { 0,1 ..., ∞ }, k=0 pair
Answer the most prepulse of radar signal j；TOAJ, 0The forward position arrival time of pulse, i.e. radar signal j may be reached for the 0th most
The forward position arrival time TOA of prepulsej；TOAJ, k+1、TOAJ, kWhen respectively kth, the k+1 forward positions that may reach pulse reach
Between；PRIJ, kFor the time interval between kth, the k+1 pulse that may be reached；Persistently iterative calculation radar signal j is next can
The forward position arrival time TOA for the pulse that can be reachedJ, k+1It (is influenced by radar detection performance, is not all of radar generation
The reachable radar detection intended recipient Antenna aperture of pulse)；Step 32, the TOA of calculating is verifiedJ, k+1Whether iteration item is met
Part, stopping criterion for iteration and radar detection performance are in relation to (it is assumed that only radar antenna main lobe and the irradiation of the first minor lobe main beam
When to radar detection target, radar detection intended recipient antenna can just receive radar pulse), when radar detection performance is
When tracking, stopping criterion for iteration is
TOAJ, k< TOAJ, k+1,
When radar detection performance is that circle is swept, stopping criterion for iteration is
When radar detection performance is fan sweeping, stopping criterion for iteration is
Or
Wherein, TjFor radar antenna scan period, W corresponding to radar signal jjIt is wide for wave beam corresponding to radar signal j
Spend (main lobe and the first minor lobe width), aJ, 1For fan sweeping start angle, a corresponding to radar signal jJ, 2It is right for radar signal j
The fan sweeping termination point answered works as TOA until meeting stopping criterion for iterationJ, k+1When meeting any of the above stopping criterion for iteration,
TOAJ, k+1As acquire the forward position arrival time TOA of updated radar signal most prepulsej, obtain updated radar signal
The forward position arrival time of most prepulse.
Step 4, for Radar Signal Transmission delay time, the forward position arrival time of radar signal most prepulse is corrected；
Since as radar in simulated scenario and the relative distance of radar detection target can change, Radar Signal Transmission
Delay time tdIt will affect the forward position arrival time TOA of radar signal most prepulsej, it is preferable that the detailed process of the step 4
Are as follows: calculate Radar Signal Transmission delay time td=S/c × 103, S is the distance between radar and radar detection target, and unit is
km；C is the light velocity, and value is 3.0 × 108m/s；The forward position arrival time of radar signal most prepulse is added into propagation delay time
Between, obtain the forward position arrival time of revised radar signal most prepulse.
Step 5, the PDW parameter of radar signal most prepulse is updated；
Since the relative distance of the switching of radar working condition, radar and radar detection target in simulated scenario changes and answers
Miscellaneous radar effect of signals, TOAjMoment reaches the signal parameter of the radar signal j of radar detection intended recipient Antenna aperture
(the PDW parameter including most prepulse) will Development pattern variation, processing need to be updated to it.Preferably, the step 5
In, the PDW parameter of the update includes carrier frequency RFj, pulse repetition period PRIj, pulse width PWj, impulse amplitude PAj, described
The renewal process that frequency carries is RFj'=RFj+ Δ RF × Rand (- 1,1), the renewal process of the pulse repetition period are PRIj'=
PRIj+ Δ PRI × Rand (- 1,1), the pulse width PWjConstant, the renewal process of the impulse amplitude is
Wherein, TOA 'j, RFj′、PRIj', PWj′、PAj' be respectively updated radar signal j most prepulse forward position
Arrival time, carrier frequency, pulse repetition period, pulse width, impulse amplitude, unit are respectively μ s, MHz, μ s, dBm；RFj、PRIj,
PWj、PAjThe carrier frequency of radar signal j before respectively updating, pulse repetition period, pulse width, impulse amplitude, Rand (- 1,1)
Indicate the random number generated in [- 1,1] range, PattenFor radar signal, signal power decays in free space transmission, and S is
The distance between radar and radar detection target；Y (x) indicates radar directional pattern data, x ∈ [- 180 °, 180 °].
Step 6, the process of step 1-5 can realize that the calculating of single pulse generates, and repeat step 1~step 5, can be completed
Complicated radar overall pulse is digitally generated.
For the validity for verifying most prepulse method algorithm, construction contains three radars (signal caused by three radars point
Do not correspond to radar signal 1, radar signal 2, radar signal 3, three radars are switched on simultaneously when experiment) and a detection target mould
Quasi- scene, wherein radar with and detection target it is opposing stationary, the relevant parameters such as radar, detection target describe in detail in simulated scenario
It is shown in Table 1 (radar signal 2 and radar signal 3 be complicated radar signal), and by most prepulse method algorithm proposed by the present invention
The overall pulse of arrival radar detection intended recipient Antenna aperture applied to the simulated scenario is digitally generated.
The relevant parameters such as radar describe in 1 simulated scenario of table
Table 2 is radar signal 1, the radar signal 2, radar being calculated using most prepulse method algorithm proposed by the present invention
The overall pulse list of the arrival radar detection intended recipient Antenna aperture of signal 3.
The most prepulse method algorithm dynamic of table 2 calculates the interlaced pulse parameter list generated
Observation table 2 is it is recognized that while three radars are switched on simultaneously, but due to considering electromagnetic wave space propagation delay time to arteries and veins
The influence of arrival time is rushed, three radar signals do not reach radar detection intended recipient Antenna aperture simultaneously.It is reached with pulse
Time is abscissa, and impulse amplitude is ordinate, and draw to corresponding data in table 2 by Matlab can be observed, in arteries and veins
Rushing arrival time is that 1s and 3s nearby has apparent cycle peak to occur (corresponding to main lobe and being irradiated to radar detection intended recipient antenna
Mouthful face), and the period sweeps that the period is consistent with preset circle in table 1, so the overall pulse data of generation embody antenna scanning state
And parameter.Therefore, the overall pulse data pulse that most prepulse method algorithm generates more meets reality, and fidelity is higher.
To sum up, most prepulse method proposed by the present invention is shown by core algorithm research, effect analysis and case verification
Comprehensively consider whether radar antenna scanning generates pulse and the influence of impulse amplitude size, electromagnetic wave space propagation delay time
Influence to pulse arrival time has the characteristics that scalability is strong, arithmetic speed is fast, simulation fidelity is high.
The invention is not limited to specific embodiments above-mentioned.The present invention, which expands to, any in the present specification to be disclosed
New feature or any new combination, and disclose any new method or process the step of or any new combination.
Claims (6)
1. a kind of complicated radar overall pulse number production method based on most prepulse, which is characterized in that specifically include with
Lower process: step 1, first arrival pulse in radar signal pulse sequence is defined as the radar signal most prepulse, is sought
Look for the radar signal reached at first in simulated scenario most prepulse；Step 2, the description of radar signal most prepulse will be reached at first
Word parameter is saved in interlaced pulse list to be output, is calculated and is generated interlaced pulse；Step 3, the most preceding arteries and veins of radar signal is updated
The forward position arrival time of punching；Step 4, for Radar Signal Transmission delay time, the forward position for correcting radar signal most prepulse is arrived
Up to the time；Step 5, the PDW parameter of radar signal most prepulse is updated；Step 6, it dynamically has been calculated and helps pulse digit generation.
2. the complicated radar overall pulse number production method based on most prepulse, feature exist as described in claim 1
In the detailed process of the step 1 are as follows: step 11, first arrival pulse in radar signal pulse sequence is defined as this
The most prepulse of radar signal, the describing word parameter of the most prepulse include the forward position arrival time TOA of most prepulsei, carry
Frequency RFi, pulse repetition period PRIi, pulse width PWi, impulse amplitude PAi, wherein i=0,1 ..., ∞ are radar signals
Number；Step 12, in calculating simulation scene all radar signals most prepulse forward position arrival time TOAi, before asking the smallest
Along arrival time TOAj(j ∈ { 0,1 ..., ∞ }), corresponding radar signal j are the radar signal most prepulse reached at first.
3. the complicated radar overall pulse number production method based on most prepulse, feature exist as claimed in claim 2
In, in the step 2, the forward position arrival time TOA of radar signal j most prepulsei, carrier frequency RFi, pulse repetition period PRIi、
Pulse width PWi, impulse amplitude PAiIt is saved among interlaced pulse list to be output, completes TOAjAll friendships before moment
Wrong pulse, which calculates, to be generated.
4. the complicated radar overall pulse number production method based on most prepulse, feature exist as claimed in claim 3
In the detailed process of the step 3 are as follows: step 31, according toWherein, k is to work as
Prepulse number, when k ∈ { 0,1 ..., ∞ }, k=0, correspond to the most prepulse of radar signal j；TOAJ, 0It may be reached for the 0th
The forward position arrival time of pulse, i.e. the forward position arrival time TOA of the most prepulse of radar signal jj；TOAJ, k+1、TOAJ, kRespectively
Kth, k+1 may reach the forward position arrival time of pulse；PRIJ, kFor the time between kth, the k+1 pulse that may be reached
Interval；The persistently forward position arrival time TOA of the next possible pulse reached of iterative calculation radar signal jJ, k+1；Step 32, it tests
Demonstrate,prove the TOA calculatedJ, k+1Whether iterated conditional is met, when radar detection performance is tracking, stopping criterion for iteration is
TOAJ, k< TOAJ, k+1,
When radar detection performance is that circle is swept, stopping criterion for iteration is
When radar detection performance is fan sweeping, stopping criterion for iteration is
Or
Wherein, TjFor radar antenna scan period, W corresponding to radar signal jjFor beam angle corresponding to radar signal j,
aJ, 1For fan sweeping start angle, a corresponding to radar signal jJ, 2For fan sweeping termination point corresponding to radar signal j, until full
Sufficient stopping criterion for iteration obtains the forward position arrival time of updated radar signal most prepulse.
5. the complicated radar overall pulse number production method based on most prepulse, feature exist as claimed in claim 4
In the detailed process of the step 4 are as follows: calculate Radar Signal Transmission delay time td=S/c × 103, S is that radar and radar are visited
The distance between target is surveyed, c is the light velocity, and the forward position arrival time of radar signal most prepulse is added the propagation delay time, is obtained
Take the forward position arrival time of revised radar signal most prepulse.
6. the complicated radar overall pulse number production method based on most prepulse, feature exist as claimed in claim 5
In in the step 5, the PDW parameter of the update includes carrier frequency RFj, pulse repetition period PRIj, pulse width PWj, pulse
Amplitude PAj, the renewal process that the frequency carries is RFj'=RFj+ Δ RF × Rand (- 1,1), the update of the pulse repetition period
Process is PRIj'=PRIj+ Δ PRI × Rand (- 1,1), the pulse width PWjIt is constant, the renewal process of the impulse amplitude
For
Wherein, TOA 'j, RFj′、PRIj', PWj′、PAjThe forward position of ' respectively most the prepulse of updated radar signal j reaches
Time, carrier frequency, pulse repetition period, pulse width, impulse amplitude, RFj、PRIj, PWj、PAjRadar letter before respectively updating
The carrier frequency of number j, pulse repetition period, pulse width, impulse amplitude, Rand (- 1,1) indicate to generate in [- 1,1] range with
Machine number, PattenFor radar signal in free space transmission signal power decay, S between radar and radar detection target away from
From；Y (x) indicates radar directional pattern data, x ∈ [- 180 °, 180 °].
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| CN111654264A (en) * | 2020-05-27 | 2020-09-11 | 桂林长海发展有限责任公司 | Method and system for generating signal pulse sequence by signal data simulator |
| CN111654264B (en) * | 2020-05-27 | 2023-04-28 | 桂林长海发展有限责任公司 | Method and system for generating signal pulse sequence by signal data simulator |
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