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Could you help to fix error of this MATLAB code. + Error: Undefined function or variable 'music _ spectrum'. Error in Assignment _ 2 (
Could you help to fix error of this MATLAB code.
Error: Undefined function or variable 'musicspectrum'.
Error in Assignmentline
Pmusic musicspectrumthetascan, A noiseeigvecs;
Code:
Part b: Accuracy for Different Noise Variances
noisevariances linspace sigman sigman;
msenoise zerossizenoisevariances;
for varidx :lengthnoisevariances
var noisevariancesvaridx;
msevalues zeros; Preallocate for Monte Carlo simulations
for sim :
noise sqrtvarrandnM Nj randnM N;
X A S noise;
R X X N;
eigvecs eigvals eigR;
~ ind sortdiageigvals 'descend';
noiseeigvecs eigvecs: indsizeS:end;
Pmusic musicspectrumthetascan, A noiseeigvecs;
~ maxidx maxPmusic;
estimateddoa thetascanmaxidx;
msevaluessim computemsethetas estimateddoa;
end
msenoisevaridx meanmsevalues;
end
Part c: Accuracy for Different Number of Sensors
sensorcounts M:M;
msesensors zerossizesensorcounts;
for midx :lengthsensorcounts
m sensorcountsmidx;
A steeringvectorm d thetas;
msevalues zeros; Preallocate for Monte Carlo simulations
for sim :
noise sqrtsigmanrandnm Nj randnm N;
X A S:m :) noise;
R X X N;
eigvecs eigvals eigR;
~ ind sortdiageigvals 'descend';
noiseeigvecs eigvecs: indsizeS:end;
Pmusic musicspectrumthetascan, A noiseeigvecs;
~ maxidx maxPmusic;
estimateddoa thetascanmaxidx;
msevaluessim computemsethetas estimateddoa;
end
msesensorsmidx meanmsevalues;
end
Part d: Accuracy for Different Number of Snapshots
snapshotcounts roundlinspace N N;
msesnapshots zerossizesnapshotcounts;
for nidx :lengthsnapshotcounts
n snapshotcountsnidx;
msevalues zeros; Preallocate for Monte Carlo simulations
for sim :
noise sqrtsigmanrandnM nj randnM n;
X A S::n noise;
R X X n;
eigvecs eigvals eigR;
~ ind sortdiageigvals 'descend';
noiseeigvecs eigvecs: indsizeS:end;
Pmusic musicspectrumthetascan, A noiseeigvecs;
~ maxidx maxPmusic;
estimateddoa thetascanmaxidx;
msevaluessim computemsethetas estimateddoa;
end
msesnapshotsnidx meanmsevalues;
end
Plotting MSE results
figurePosition;
Noise Variance
subplot;
plotnoisevariances, msenoise, o;
titleMSE vs Noise Variance';
xlabelNoise Variance';
ylabelMSE;
Number of Sensors
subplot;
plotsensorcounts, msesensorso;
titleMSE vs Number of Sensors';
xlabelNumber of Sensors';
ylabelMSE;
Number of Snapshots
subplot;
plotsnapshotcounts, msesnapshots, o;
titleMSE vs Number of Snapshots';
xlabelNumber of Snapshots';
ylabelMSE;
sgtitleMSE Analysis';
Function to compute MSE of DOA estimates
function mse computemsetruedoa, estimateddoa
mse meantruedoa estimateddoa;
end
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