Dear, Researchers,
doe any one can provide me the the source codes for conventional wideband DOA estimations techniques (i.e., IMUSIC, CSSM, WAVES, TOPS, etc. ), please? I need them as benchmarks for performance -comparison purposes.
I highly appreciate your help
Thank you so much
Conventional Subspace-based Spectrum Estimation Method, or CSSM, is a known technique used in array signal processing for estimating the power spectral density of a signal. Here is an example MATLAB code for implementing CSSM:
% Generate random signal
N = 1024; % number of samples
x = randn(N, 1); % generate Gaussian noise
% Define parameters
L = 32; % number of snapshots
M = 8; % dimension of signal subspace
K = 1; % number of signals
% Construct signal subspace
X = zeros(N-L+1, L);
for i=1:N-L+1
X(i,:) = x(i:i+L-1);
end
[U, S, V] = svd(X);
Un = U(:, M+1:end); % noise subspace
Us = U(:, 1:M); % signal subspace
% Generate signal
f0 = 0.2; % frequency of signal
A = 1; % amplitude of signal
s = A*sin(2*pi*f0*(0:N-1)');
% Add signal to noise
y = x ;
% Estimate power spectral density
Ryy = y*y'/L;
[E, D] = eig(Ryy);
[lambda, idx] = sort(diag(D), 'descend');
E = E(:,idx);
Ss = E(:,1:M);
P = Ss*Ss';
% Plot results
f = linspace(0, 0.5, N/2+1);
H = freqz(s, 1, f);
figure;
subplot(2,1,1); plot(f, 10*log10(abs(H).^2)); title('True PSD');
subplot(2,1,2); plot(f, 10*log10(P(1:N/2+1))); title('Estimated PSD');
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