AU2021105419A4 - Highly-dynamic Radar Platform Echo Modeling Method Based on Space-time Decomposition - Google Patents

Highly-dynamic Radar Platform Echo Modeling Method Based on Space-time Decomposition Download PDF

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AU2021105419A4
AU2021105419A4 AU2021105419A AU2021105419A AU2021105419A4 AU 2021105419 A4 AU2021105419 A4 AU 2021105419A4 AU 2021105419 A AU2021105419 A AU 2021105419A AU 2021105419 A AU2021105419 A AU 2021105419A AU 2021105419 A4 AU2021105419 A4 AU 2021105419A4
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echo
highly
target
environment
radar platform
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AU2021105419A
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Peng Peng
Tao Song
Hualong SUN
Chuangming Tong
Tong Wang
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Air Force Engineering University of PLA
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Air Force Engineering University of PLA
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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
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/003—Bistatic radar systems; Multistatic radar systems
    • 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
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/06—Systems determining position data of a target
    • 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
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/06—Systems determining position data of a target
    • G01S13/08—Systems for measuring distance only
    • 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
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/06—Systems determining position data of a target
    • G01S13/08—Systems for measuring distance only
    • G01S13/10—Systems for measuring distance only using transmission of interrupted, pulse modulated waves
    • G01S13/12—Systems for measuring distance only using transmission of interrupted, pulse modulated waves wherein the pulse-recurrence frequency is varied to provide a desired time relationship between the transmission of a pulse and the receipt of the echo of a preceding pulse
    • 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
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/88—Radar or analogous systems specially adapted for specific applications
    • 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
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/28—Details of pulse systems
    • G01S7/285—Receivers
    • G01S7/292—Extracting wanted echo-signals
    • 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
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/40—Means for monitoring or calibrating
    • G01S7/4052—Means for monitoring or calibrating by simulation of echoes
    • 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
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/41—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00 using analysis of echo signal for target characterisation; Target signature; Target cross-section
    • G01S7/414—Discriminating targets with respect to background clutter
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B13/00—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion
    • G05B13/02—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric
    • G05B13/04—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators

Abstract

The present invention discloses a highly-dynamic radar platform echo modeling method based on space-time decomposition, comprising the following steps: Si, constructing an electromagnetic scattering calculating model between a target and an environment based on a highly-dynamic radar platform echo view; S2, performing subdivision and simulation operation on the electromagnetic scattering calculating model between the target and the environment to obtain electromagnetic scattering fields between the target and the environment; S3, performing time decomposition on a detection signal emitted by a radar, performing spatial decomposition and electromagnetic calculation on the electromagnetic scattering fields between the target and the environment, and applying the time-decomposed detection signal into the electromagnetic scattering fields between the target and the environment on which spatial decomposition and electromagnetic calculation is performed to synthesize an echo signal. The highly-dynamic radar platform echo modeling method based on space-time decomposition can obtain a highly-dynamic radar platform echo simulation signal and improve echo modeling fidelity of the highly-dynamic radar platform by modeling highly dynamic radar echoes. 1/6 FIGURE OF THE SPECIFICATION Construct an electromagnetic scattering calculating model between a target and an environment based on a highly-dynamic radar platform echo view Perform subdivision and simulation operation on the electromagnetic scattering calculating model between the target and the environment to obtain % 2 electromagnetic scattering fields between the target and the environment Perform time decomposition on a detection signal emitted by a radar, perform spatial decomposition and electromagnetic calculation on the electromagnetic scattering fields between the target and the environment, and apply the time-decomposed detection signal into the S3 electromagnetic scattering fields between the target and the environment on which spatial decomposition and electromagnetic calculation is performed to synthesize an echo signal FIG. 1

Description

1/6 FIGURE OF THE SPECIFICATION
Construct an electromagnetic scattering calculating model between a target and an environment based on a highly-dynamic radar platform echo view
Perform subdivision and simulation operation on the electromagnetic scattering calculating model between the target and the environment to obtain % 2 electromagnetic scattering fields between the target and the environment
Perform time decomposition on a detection signal emitted by a radar, perform spatial decomposition and electromagnetic calculation on the electromagnetic scattering fields between the target and the environment, and apply the time-decomposed detection signal into the S3 electromagnetic scattering fields between the target and the environment on which spatial decomposition and electromagnetic calculation is performed to synthesize an echo signal
FIG. 1
Highly-dynamic Radar Platform Echo Modeling Method Based on Space-time
Decomposition
TECHNICAL FIELD
The present invention relates to the technical field of highly-dynamic radar
platform target modeling and simulation, and in particular, to a highly-dynamic radar
platform echo modeling method based on space-time decomposition.
BACKGROUND
Many modern radars are loaded on some highly-dynamic platforms such as a
missile-borne platform and an airborne platform according to use thereof, and echo
characteristics of these radar platforms are more complex than those of a fixed ground
radar station. The highly-dynamic radar platforms are difficult in obtaining echoes
due to some characteristics thereof. For example, radar guide heads on the
highly-dynamic flight missiles cannot be recycled basically after the missiles are
launched; in addition, the guide heads are in highly-dynamic flight after being guided
due to limited capacity of data on the missiles, and echo data thereof are difficult to
download in real time, as a result, the echo data of the radar guide heads in a current
real ballistic flight are difficult to acquire. Outfield experiment for testing and
studying the echo characteristics of the highly-dynamic radar platforms is high in cost
and great in limitation, and is difficult in realistically simulating highly-dynamic
echoes under three-dynamic conditions of a highly-dynamic platform, a target and a
dynamic environment. As a result, even though the tests are carried out, echo samples
under various environments are difficult to acquire. Echo characteristic research under
various complex parameter conditions of the highly-dynamic radar platform, the
target and the environment can be carried out more flexibly through a numerical simulation technique, and therefore, the method is of important significance in design, assessment, optimization and the like of the performance of the radars.
SUMMARY
To solve the problems, the present invention discloses a highly-dynamic radar
platform echo modeling method based on space-time decomposition to solve the
technical problems in the prior art, which can obtain an echo simulation signal of the
highly-dynamic radar platform through the echo characteristics under the
highly-dynamic radar platform, the target and the environment and can improve the
echo modeling fidelity of the highly-dynamic radar platform through the
electromagnetic scattering mechanism between a target and an environment in a radar
view and the electromagnetic simulation technology.
To achieve the objective, the present invention provides the following scheme: a
highly-dynamic radar platform echo modeling method based on space-time
decomposition is provided, including the following steps:
Si, constructing an electromagnetic scattering calculating model between a
target and an environment based on a highly-dynamic radar platform echo view;
S2, performing subdivision and simulation operation on the electromagnetic
scattering calculating model between the target and the environment to obtain
electromagnetic scattering fields between the target and the environment;
S3, performing time decomposition on a detection signal emitted by a radar,
performing spatial decomposition and electromagnetic calculation on the
electromagnetic scattering fields between the target and the environment, and
applying the time-decomposed detection signal into the electromagnetic scattering
fields between the target and the environment on which spatial decomposition and
electromagnetic calculation is performed to synthesize an echo signal.
Preferably, the radar platform echo view includes a major lobe of a directional
diagram of a radar antenna, and a major side lobe radiation area, which are used for
determining an echo generation area.
Preferably, the highly-dynamic radar platform echo view further includes a
plurality of echo units, each echo unit including an echo calculating unit area.
Preferably, the echo units are divided according to a radar distance-azimuth
resolution.
Preferably, the echo units are positioned in a circular arc taking the radar
platform as a center of a circle, a distance between every two adjacent echo units
being equal.
Preferably, the subdivision areas are targets and environment models in each
echo calculating unit area.
Preferably, the specific time decomposition is as follows: sampling the detection
signal, and decomposing an emission pulse signal of the detection signal into a narrow
pulse signal on a time domain through sampling frequency.
Preferably, the narrow pulse signal acts on scattering points in different range
azimuths in a space.
The present invention discloses the following technical effects:
1. The highly-dynamic radar platform echo simulation signal is obtained by
combining echo characteristics under the three-dynamic conditions of the
highly-dynamic radar platform, the target and the environment.
2. The echo modeling fidelity of the highly-dynamic radar platform is improved
by combining the electromagnetic scattering mechanism between the target and the
environment in the radar view with the electromagnetic simulation technology.
BRIEF DESCRIPTION OF THE FIGURES
In order to explain the technical solutions in the embodiments of the present
invention or the prior art clearer, the drawings used in the embodiments will be briefly
introduced below. Obviously, the drawings in the following description are some
embodiments of the present invention. For a person of ordinary skill in the art, other
drawings can be obtained based on these drawings without paying creative labor.
FIG. 1 is a flowchart showing a method in an embodiment of the present
invention;
FIG. 2(a) is a diagram showing an echo generation area in a radar view in an
embodiment of the present invention;
FIG. 2(b) is a schematic diagram showing radar echo unit subdivision and
scattering calculation quadratic subdivision in an embodiment of the present
invention;
FIG. 3 is a schematic diagram showing target-environment electromagnetic
scattering simulation in an embodiment of the present invention;
FIG. 4(a) is a schematic diagram showing space-time decomposition echo
generation of a highly-dynamic radar in an embodiment of the present invention;
FIG. 4(b) is a schematic diagram showing a space-time decomposition echo
generation principle of a highly-dynamic radar in an embodiment of the present
invention;
FIG. 5 is a diagram showing a flight test scenario of a highly-dynamic radar
platform in an embodiment of the present invention;
FIG. 6(a) is a distance-Doppler spectrum obtained after flight acquisition echo
treatment in case of a bandwidth of 20 MHz, a slope distance between a radar and a
target of 7.953 km and a radar pitch angle of 4062 degrees in an embodiment of the
present invention;
FIG. 6(b) is a numerical simulation test distance-Doppler result comparison
diagram when calculating frequency, bandwidth, a wave beam pitch angle and a sea
surface as well as target parameters are the same with a flight test scenario and
parameter conditions in an embodiment of the present invention; and
FIG. 7 is a comparison diagram between a target distance in-door flight test and
simulation echo Doppler dimension in an embodiment of the present invention.
DESCRIPTION OF THE INVENTION
The technical solutions in the embodiments of the present invention will be
described clearly and completely in combination with the drawings in the
embodiments of the present invention. Obviously, the described embodiments are part
of, but not all of, the embodiments of the present invention. Based on the
embodiments in the present invention, all other embodiments obtained by a person of
ordinary skill in the art without creative efforts shall fall within the protection scope
of the present invention.
In order to make the above-mentioned objectives, features and advantages of the
present invention more obvious and understandable, the specific embodiments of the
present invention will be described in detail below with reference to the
accompanying drawings.
Referring to FIG. 1, the embodiment provides a highly-dynamic radar platform
echo modeling method based on space-time decomposition, including the following
steps:
Si, constructing an electromagnetic scattering calculating model between a
target and an environment based on a highly-dynamic radar platform echo view.
The echo generation area is determined according to an echo view of the radar
platform, and the echo view of the radar platform includes a major lobe of a directional diagram of a radar antenna, and a major side lobe radiation area. The echo units are divided by radar distance-azimuth (Doppler) resolution. As shown in FIG.
2(a) to FIG. 2(b), emitted electromagnetic waves are propagated in the forms of
spherical waves; intersecting lines of equal-distance spherical surfaces and the sea
surface are equal-distance rings, and units with the same distance are positioned in the
circular arc taking the radar platform as the center of the circle; and an
electromagnetic scattering calculating model between a target and an environment is
constructed based on a multi-scale geometric structure as well as characteristics of a
target structure and the scattering mechanism. The electromagnetic scattering
calculating model between the target and the environment includes: adopting Physical
Optics (PO) and an Equivalent Edge Current (EEC) to respectively calculate
contribution of target surface scattering and edge structure diffraction, adopting a
multi-scale environment surface element method to calculate scattering of the
environment, and adopting an accelerated ray tracer technique to calculate coupling
scattering between the target and the environment, as shown in FIG. 3.
S2, performing subdivision and simulation operation on the electromagnetic
scattering calculating model between the target and the environment to obtain
electromagnetic scattering fields between the target and the environment.
The highly-dynamic radar platform echo view further includes a plurality of echo
units, each echo unit including an echo calculating unit area.
The specific calculating process includes: subdividing the target and
environment models in each echo calculating unit area according to the requirements
of electromagnetic scattering calculation; and calculating electromagnetic scattering
fields between the target and the environment according to the corresponding
electromagnetic calculating method adopted by the scattering mechanism between the target and the environment.
S3, performing time decomposition on a detection signal emitted by a radar,
performing spatial decomposition and electromagnetic calculation on the
electromagnetic scattering fields between the target and the environment, and
applying the time-decomposed detection signal into the electromagnetic scattering
fields between the target and the environment on which spatial decomposition and
electromagnetic calculation is performed to synthesize an echo signal.
The signal (namely the detection signal) emitted by the radar is sampled, and the
emission pulse signal F(t) of the signal emitted by the radar is decomposed into a
narrow time pulse signal on a time domain, the narrow pulse is viewed as temporary
impact which acts on scattering points in different distance azimuths in the space; the
target-environment scattering fields are viewed as a time function W(t), compound
scattering fields are decomposed in a space area, a radar echo signal is received in
space according to an equal-distance door divided based on distance resolution,
scattering units within the same distance door are subjected to amplitude weighting
according to an antenna directional pattern, and are subjected to superposed synthesis,
so that a dynamic scattering problem is decomposed into a plurality of quasi-static
scattering components to finally synthesize an echo signal as shown in FIG. 4(a) to
FIG. 4(b).
Based on the steps, a relationship among the echo signal, a detection waveform
and target-environment scattering is established under a dynamic condition to
simulate a generation process of highly-dynamic echoes. To test the accuracy of the
modeling method, the echo results are acquired by the flight test to compare with
simulation results, and an acquisition process of highly-dynamic radar echoes is
simulated by a flight scenario as shown in FIG. 5.
The specific test site is at Boao sea area of Hainan. In the test process, a target
drone and a flight plane carrying a test radar guide head fly across the area of a test
scenario in a circulating mode. The flight plane flies at a height of about 1,200 m, and
the target drone flies at a height of about 100 m. The guide head is hung below the
flight plane. After taking off, the flight planes and the target drone oppositely fly
according to a set flight course and enter a preset entry point at the same time. After
entering the course route, an upper computer can determine a relative position
relationship between the flight plane and the target drone according to a GPS
positioning system, and test equipment calculates a wave beam point angle and
missile-target distance information according to GPS data, and sends the information
to the guide head. A wave beam tracking beacon is adjusted, so that a wave beam is
irradiated to a target scenario area; and an inertial navigation angle and a wave beam
point angle corresponding to each echo acquisition frame are recorded through the
flight plane. Wind speed and a wind direction are respectively measured through an
anemograph and an infrared distance meter assisted direction determinant. Wind
speed and sea state parameters of the flight scenario are obtained by averaging
multi-time measured values; seawater is sampled at multiple time frames and an
average seawater temperature T (°C) and salinity S (%o) is obtained by averaging the
measured values of a salinity meter and a thermometer so as to calculate a dielectric
constant of sea water.
Referring to FIG. 6(a) to FIG. 6(b), beacons and tail lobe clutters further can be
seen in a guide head view in flight test results, where the beacons provide calibration
for flight plane wave beam scheduling in the flight test, and the tail lobe clutters are
generated when backward radiation energy of the antenna irradiates the sea surface to
generate scatter, and have negative Doppler frequency. In numerical simulation, only echoes within the forward 180-degree view of the guide head are sampled, and therefore, the echoes and the clutter components are different in two results. In addition, in a numerical simulation processing result diagram of a sea-skimming target under the same condition, components such as main-lobe clutters, side-lobe clutters, height line clutters, target echoes and multiple paths can be seen on the distance-Doppler position with the results the same with the flight test data processing results. In addition, the amplitude change trend of each component in the numerical simulation echoes realistically coincides with the flight result processing results.
Referring to FIG. 7, echoes obtained by test and simulation in a target distance
door are compared in terms of Doppler (speed) dimension.
Through the comparison of the two results, it can be seen that errors of the main
components (clutters, target echoes and multiple paths) in the simulation tests and the
test results in the experiment are within 3dB through comparison, so that the
engineering needs can be met, and the accuracy of guide head echo modeling and
numerical simulation method is further verified. In addition, a radar echo signal with
high fidelity is obtained through highly-dynamic radar platform echo modeling.
The present invention discloses the following technical effects:
1. The highly-dynamic radar platform echo simulation signal is obtained by
combining echo characteristics under the three-dynamic conditions of the
highly-dynamic radar platform, the target and the environment.
2. The echo modeling fidelity of the highly-dynamic radar platform is improved
by combining electromagnetic scattering mechanism between the target and the
environment in the radar view with the electromagnetic simulation technology.
Finally, it should be noted that the above embodiments are only used to illustrate
the technical solution of the present invention, but not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, a person of ordinary skill in the art should understand that modifications to the technical solutions described in the foregoing embodiments, or equivalent replacements of some of the technical features thereof can be made; and these modifications or replacements do not depart the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and are within the extent of protection of the present invention. Therefore, the protection scope of the patent of the present application shall be subjected to the appended claims.

Claims (8)

1. A highly-dynamic radar platform echo modeling method based on space-time
decomposition, comprising the following steps:
Si, constructing an electromagnetic scattering calculating model between a
target and an environment based on a highly-dynamic radar platform echo view;
S2, performing subdivision and simulation operation on the electromagnetic
scattering calculating model between the target and the environment to obtain
electromagnetic scattering fields between the target and the environment; and
S3, performing time decomposition on a detection signal emitted by a radar,
performing spatial decomposition and electromagnetic calculation on the
electromagnetic scattering fields between the target and the environment, and
applying the time-decomposed detection signal into the electromagnetic scattering
fields between the target and the environment on which spatial decomposition and
electromagnetic calculation is performed to synthesize an echo signal.
2. The highly-dynamic radar platform echo modeling method based on
space-time decomposition according to claim 1, wherein the radar platform echo view
comprises a major lobe of a directional diagram of a radar antenna, and a major side
lobe radiation area, which are used for determining an echo generation area.
3. The highly-dynamic radar platform echo modeling method based on
space-time decomposition according to claim 2, wherein the highly-dynamic radar
platform echo view further comprises a plurality of echo units, each echo unit
comprising an echo calculating unit area.
4. The highly-dynamic radar platform echo modeling method based on
space-time decomposition according to claim 3, wherein the echo units are divided
according to a radar distance-azimuth resolution.
5. The highly-dynamic radar platform echo modeling method based on
space-time decomposition according to claim 4, wherein the echo units are positioned
in a circular arc taking the radar platform as a center of a circle, a distance between
every two adjacent echo units being equal.
6. The highly-dynamic radar platform echo modeling method based on
space-time decomposition according to claim 3, wherein the subdivision areas are
targets and environment models in each echo calculating unit area.
7. The highly-dynamic radar platform echo modeling method based on
space-time decomposition according to claim 1, wherein the specific time
decomposition is as follows: sampling the detection signal, and decomposing an
emission pulse signal of the detection signal into a narrow pulse signal on time
domain through sampling frequency.
8. The highly-dynamic radar platform echo modeling method based on
space-time decomposition according to claim 7, wherein the narrow pulse signal acts
on scattering points in different range azimuths in a space.
AU2021105419A 2021-08-13 2021-08-13 Highly-dynamic Radar Platform Echo Modeling Method Based on Space-time Decomposition Active AU2021105419A4 (en)

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