updateScatteringMatrix
Description
updateScatteringMatrix(
updates one or more polarization scattering matrices, where surface
,Name=Value
)surface
is
a customSurface
object. Name
specifies the
property name (Shh
, Svv
,Shv
,
or Svh
) and Value
updates the corresponding
property value.
Examples
Update Scattering Matrix
Create Custom Surface
Create a co-polarized custom surface.
% Create a radar scenario rng('default'); scene = radarScenario(IsEarthCentered=false); % Create a co-polarized custom surface bnds = [-600 570; 0 1.17e3]; Shh = zeros(40,40,2); Svv = ones(40,40,2); Shv = zeros(size(Shh)); srf = customSurface(scene,Boundary=bnds, ... CrossPolarization='Symmetric',Shh=Shh,Svv=Svv,Shv=Shv);
Collect I/Q Data
Create a vertically polarized radar I/Q sensor and collect data.
% Create a vertically polarized radar IQ sensor and attach to % a platform freq = 500e6; sweepBW = 5e6; fs = 2*sweepBW; wav = phased.LinearFMWaveform(SampleRate=fs, ... SweepBandwidth=sweepBW); rdr = radarTransceiver(Waveform=wav, ... MountingAngles=[-90 10 0], ... RangeLimits=[0 1.2e3]); element = phased.ShortDipoleAntennaElement; ula = phased.ULA(Element=element); configureAntennas(rdr,Combined=ula); rdr.TransmitAntenna.OperatingFrequency = freq; rdr.ReceiveAntenna.OperatingFrequency = freq; rdr.Receiver.SampleRate = fs; rdrplat = platform(scene,Position=[0 0 10],Sensors=rdr); % Create clutter generator cluttergen = clutterGenerator(scene,rdr,Resolution=30, ... RangeLimit=1.2e3); % Advance scene and collect IQ advance(scene); iq = receive(scene); % Pulse compress mf = getMatchedFilter(rdr.Waveform); rngresp = phased.RangeResponse(SampleRate=fs); [iqPC,rngGrid] = rngresp(iq{1}(:,1),mf); figure nexttile plot(rngGrid,mag2db(abs(iqPC))) title(['Pulse 1, Element 1' newline 'Co-Polarized Surface']) xlabel('Range (m)') ylabel('Magnitude (dB)') grid on axis tight ylim([-80 60])
Update Scattering Matrix Values
Update scattering matrix values for HH and VV components to make the surface cross-polarized and collect I/Q data.
% Update scattering matrix values for HH and VV components. % Make the surface cross-polarized. Shh = ones(40,40,2); Svv = zeros(40,40,2); updateScatteringMatrix(srf,Shh=Shh,Svv=Svv) % Collect IQ iq = receive(scene); [iqPC,rngGrid] = rngresp(iq{1}(:,1),mf); nexttile plot(rngGrid,mag2db(abs(iqPC))) title(['Pulse 2, Element 1' newline ... 'Cross-Polarized Surface']) xlabel('Range (m)') ylabel('Magnitude (dB)') grid on axis tight ylim([-80 60]) sgtitle('Custom Surface')
Input Arguments
surface
— Custom surface
CustomSurface
object
Surface, specified as a CustomSurface
object.
Name-Value Arguments
Specify optional pairs of arguments as
Name1=Value1,...,NameN=ValueN
, where Name
is
the argument name and Value
is the corresponding value.
Name-value arguments must appear after other arguments, but the order of the
pairs does not matter.
Example: updateScatteringMatrix(surface,Shh=ones(40,40,2),Svv=zeros(40,40,2))
Shh
— Polarization scattering matrix co-polarized HH
component
3-by-3-by-2 matrix of ones (default) | M
-by-N
-by-P
matrix
Specify the complex-valued polarization scattering matrix co-polarized
HH
component, where HH
represents horizontal
transmission and horizontal reception, as an
M
-by-N
-by-P
matrix.
M
indicates the number of components in the
x-direction, N
indicates the number of
components in the y-direction, and P
corresponds
to the number of elements in the Frequency
vector. The matrix is
bounded in space by the Boundary
property limits.
Data Types: double
Complex Number Support: Yes
Svv
— Polarization scattering matrix co-polarized VV
component
3-by-3-by-2 matrix of ones (default) | M
-by-N
-by-P
matrix
Specify the complex-valued polarization scattering matrix co-polarized
VV
component, where VV
represents vertical
transmission and vertical reception, as an
M
-by-N
-by-P
matrix.
M
indicates the number of components in the
x-direction, N
indicates the number of
components in the y-direction, and P
corresponds
to the number of elements in the Frequency
vector. The matrix is
bounded in space by the Boundary
property limits.
Data Types: double
Complex Number Support: Yes
Shv
— Polarization scattering matrix cross-polarized HV
component
3-by-3-by-2 matrix of ones (default) | M
-by-N
-by-P
matrix
Specify the complex-valued polarization scattering matrix cross-polarized
HV
component, where HV
represents horizontal
transmission and vertical reception, as an
M
-by-N
-by-P
matrix.
M
indicates the number of components in the
x-direction, N
indicates the number of
components in the y-direction, and P
corresponds
to the number of elements in the Frequency
vector. The matrix is
bounded in space by the Boundary
property limits.
Data Types: double
Complex Number Support: Yes
Svh
— Polarization scattering matrix cross-polarized VH
component
3-by-3-by-2 matrix of ones (default) | M
-by-N
-by-P
matrix
Specify the complex-valued polarization scattering matrix cross-polarized
VH
component, where VH
represents vertical
transmission and horizontal reception, as an
M
-by-N
-by-P
matrix.
M
indicates the number of components in the
x-direction, N
indicates the number of
components in the y-direction, and P
corresponds
to the number of frequencies in Frequency
. The matrix is bounded in
space by the Boundary
property limits.
Dependencies
To enable this property, set the CrossPolarization
property
to "full"
.
Data Types: double
Complex Number Support: Yes
Version History
Introduced in R2024a
See Also
CustomSurface
| customSurface
| SurfaceManager
| radarScenario
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