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Institute of Technical Acoustics (ITA)
toolbox
Commits
9aa13e8c
Commit
9aa13e8c
authored
Jan 12, 2017
by
Marco Berzborn
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added some more documentation to sph mimo simulation
parent
50502600
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3
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34 additions
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29 deletions
+34
-29
applications/SphericalHarmonics/ita_sph_mimo_error_simulation.m
...ations/SphericalHarmonics/ita_sph_mimo_error_simulation.m
+19
-14
applications/SphericalHarmonics/ita_sph_modal_strength.m
applications/SphericalHarmonics/ita_sph_modal_strength.m
+10
-8
applications/SphericalHarmonics/ita_sph_sampling/ita_sph_sampling_displacement.m
...armonics/ita_sph_sampling/ita_sph_sampling_displacement.m
+5
-7
No files found.
applications/SphericalHarmonics/ita_sph_mimo_error_simulation.m
View file @
9aa13e8c
function
varargout
=
ita_sph_mimo_error_simulation
(
varargin
)
%ITA_SPH_MIMO_ERROR_SIMULATION - Simulate aliasing and noise errors in
% spherical MIMO systems.
% This function
% This function simulates the mismatch errors from noise, sampling dispacement and aliasing
% for a MIMO system comprised of a spherical loudspeaker array and a spherical microphone
% array.
%
% Syntax:
% itaResult = ita_sph_mimo_error_simulation(options)
%
% Options (default):
% 'opt1' (defaultopt1) : description
% 'opt2' (defaultopt1) : description
% 'opt3' (defaultopt1) : description
% 'SNR' (60) : SNR at each transducer
% 'nRuns' (5) : calculate average of nRuns number of source-receiver orientations
% 'dirMeasurementFile' ( [] ) : Filename for a directivity file that is to be included
%
% Directivity files need to be in hdf5 format. The name of data fields need to be 'fullDirRe' and
% 'fullDirIm' for the real and imaginary part respectively.
%
% Example:
%
audioObjOut = ita_sph_mimo_error_simulation(audioObjIn
)
%
[individualTerms, allTerms, totalError] = ita_sph_mimo_error_simulation(sourceParams, receiverParams, opts
)
%
% See also:
% ita_toolbox_gui, ita_read, ita_write, ita_generate
...
...
@@ -26,7 +31,7 @@ function varargout = ita_sph_mimo_error_simulation(varargin)
% </ITA-Toolbox>
% Author: Marco Berzborn -- Email: marco.berzborn@rwth-aachen.de
% Author: Marco Berzborn -- Email: marco.berzborn@
akustik.
rwth-aachen.de
% Created: 29-Mar-2016
...
...
@@ -47,6 +52,7 @@ sArgs = struct('pos1_source','struct',...
'dirMeasurementFile'
,[]);
[
source
,
receiver
,
sArgs
]
=
ita_parse_arguments
(
sArgs
,
varargin
);
% save all struct fields as variables for speed improvements in the parfor loop
receiverNmax
=
receiver
.
Nmax
;
receiverSampling
=
receiver
.
sampling
;
...
...
@@ -74,7 +80,7 @@ simWNG = sArgs.simWNG;
yMIMOgroundTruth
=
zeros
(
sArgs
.
nRuns
,
1
,
numel
(
kVec
));
% check if source and receiver sampling have a unique radius within a certain tolerance
if
numel
(
unique
(
sourceSampling
.
r
))
>
1
uniRSort
=
sort
(
unique
(
sourceSampling
.
r
));
if
uniRSort
(
1
)
>
uniRSort
(
end
)
*
(
1
-
2
*
eps
)
&&
uniRSort
(
end
)
<
uniRSort
(
1
)
*
(
1
+
2
*
eps
)
...
...
@@ -90,8 +96,10 @@ if numel(unique(receiverSampling.r)) > 1
end
end
% include measured source directivity
dirMeasurementFile
=
sArgs
.
dirMeasurementFile
;
%% separate error bounds
% initialize constant variables
receiverYalias
=
ita_sph_base
(
receiverSampling
,
receiverNmaxAlias
);
sourceYalias
=
ita_sph_base
(
sourceSampling
,
sourceNmaxAlias
);
sourceGalias
=
ita_sph_aperture_function_sla
(
sourceSampling
,
sourceNmaxAlias
,
sourcerMem
);
...
...
@@ -100,11 +108,9 @@ sourceG = sourceGalias(:,1:(sourceNmax+1)^2);
sourceY
=
sourceYalias
(:,
1
:(
sourceNmax
+
1
)
^
2
);
receiverY
=
receiverYalias
(:,
1
:(
receiverNmax
+
1
)
^
2
);
%% init
% sma terms
% declare non constant variables
eMismatchReceiver
=
zeros
(
sArgs
.
nRuns
,
1
,
numel
(
freqVec
));
eAliasReceiver
=
zeros
(
sArgs
.
nRuns
,
1
,
numel
(
freqVec
));
% sla terms
eMismatchSource
=
zeros
(
sArgs
.
nRuns
,
1
,
numel
(
freqVec
));
eAliasSource
=
zeros
(
sArgs
.
nRuns
,
1
,
numel
(
freqVec
));
elapsedTime
=
zeros
(
sArgs
.
nRuns
,
1
);
...
...
@@ -185,6 +191,7 @@ for idxRun = 1:sArgs.nRuns
Msource
=
sourceB
.*
(
sourceG
.
'.*sourceY'
);
end
else
% include measured source directivity
dirMat
=
h5read
(
dirMeasurementFile
,
'/dir/fullRe'
,[
1
,
1
,
idxFreq
],[
sourceSampling
.
nPoints
,(
sourceNmaxAlias
+
1
)
^
2
,
1
])
+
...
1
i
*
h5read
(
dirMeasurementFile
,
'/dir/fullIm'
,[
1
,
1
,
idxFreq
],[
sourceSampling
.
nPoints
,(
sourceNmaxAlias
+
1
)
^
2
,
1
]);
Msource
=
dirMat
(:,
1
:(
sourceNmax
+
1
)
^
2
)
.'
;
...
...
@@ -235,8 +242,6 @@ for idxRun = 1:sArgs.nRuns
end
end
% alias error needed here since antialias bf needs them and parfor
% requires the variables to be initialized
if
simSMA
if
numel
(
unique
(
receiverSampling
.
r
))
==
1
EreceiverAlias
=
receiverYalias
*
receiverBalias
;
...
...
@@ -256,7 +261,7 @@ for idxRun = 1:sArgs.nRuns
EsourceAlias
=
[];
end
%
just use random dnm
for simulation
%
use random weighting coefficients
for simulation
sourceLambda
=
sourceRandPattern
/
norm
(
sourceRandPattern
)
.*
ita_sph_base
(
sourceLookDir
,
sourceNmax
)
'
*
4
*
pi
/(
sourceNmax
+
1
)
^
2
;
receiverLambda
=
receiverRandPattern
/
norm
(
receiverRandPattern
)
.*
ita_sph_base
(
receiverLookDir
,
receiverNmax
)
'
*
4
*
pi
/(
receiverNmax
+
1
)
^
2
;
...
...
applications/SphericalHarmonics/ita_sph_modal_strength.m
View file @
9aa13e8c
function
varargout
=
ita_sph_modal_strength
(
varargin
)
%ITA_SPH_MODAL_STRENGTH - +++ Short Description here +++
% This function ++++ FILL IN INFO HERE +++
%ITA_SPH_MODAL_STRENGTH - Calculate the modal strength function for a spherical array
% This function calculates the modal strength for a plane wave incident
% onto a spherical microphone aray. The output is a diagonal matrix if the sampling
% has a unique radius. If not, the output is a matrix with full rank. In case the wave
% number k is given as a vector the output is of size N x M x nBins.
%
% Syntax:
%
audioObjOut = ita_sph_modal_strength(audioObjIn, options
)
%
B = ita_sph_modal_strength(sampling, Nmax, k, 'rigid'
)
%
% Options (default):
% 'opt1' (defaultopt1) : description
% 'opt2' (defaultopt1) : description
% 'opt3' (defaultopt1) : description
% 'transducer' (microphone) : microphone or loudspeaker array
% 'hankelKind' (2) : choose kind of Hankel function
%
% Example:
%
audioObjOut = ita_sph_modal_strength(audioObjIn
)
%
B = ita_sph_modal_strength(sampling, Nmax, k, 'rigid'
)
%
% See also:
% ita_toolbox_gui, ita_read, ita_write, ita_generate
...
...
@@ -25,7 +27,7 @@ function varargout = ita_sph_modal_strength(varargin)
% </ITA-Toolbox>
% Author: Marco Berzborn -- Email: marco.berzborn@rwth-aachen.de
% Author: Marco Berzborn -- Email: marco.berzborn@
akustik.
rwth-aachen.de
% Created: 26-Feb-2016
%% Initialization and Input Parsing
...
...
applications/SphericalHarmonics/ita_sph_sampling/ita_sph_sampling_displacement.m
View file @
9aa13e8c
...
...
@@ -4,15 +4,13 @@ function varargout = ita_sph_sampling_displacement(varargin)
% positions taken from a given sampling grid
%
% Syntax:
%
audioObjOut = ita_sph_sampling_displacement(audioObjIn, option
s)
%
samplingDisplaced = ita_sph_sampling_displacement(sampling, opt
s)
%
% Options (default):
% 'opt1' (defaultopt1) : description
% 'opt2' (defaultopt1) : description
% 'opt3' (defaultopt1) : description
% 'relativeError' ([0.1,0.1,0.1]) : relative displacement in percent/100
%
% Example:
%
audioObjOut = ita_sph_sampling_displacement(audioObjIn
)
%
samplingDisplaced = ita_sph_sampling_displacement(sampling, [0.01,0.01,0.01]
)
%
% See also:
% ita_toolbox_gui, ita_read, ita_write, ita_generate
...
...
@@ -26,7 +24,7 @@ function varargout = ita_sph_sampling_displacement(varargin)
% </ITA-Toolbox>
% Author: Marco Berzborn -- Email: marco.berzborn@rwth-aachen.de
% Author: Marco Berzborn -- Email: marco.berzborn@
akustik.
rwth-aachen.de
% Created: 29-Mar-2016
...
...
@@ -66,4 +64,4 @@ if sArgs.relativeError(:,1) == 0
end
varargout
{
1
}
=
samplingError
;
end
\ No newline at end of file
end
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