Number of sinusoids Estimator
Fast Algorithm estimating the number of sinusoids in a white Gaussian noise. This algorithm use a sub-space method based on chi-square statistics of eigen values of the Autocorrelation Matrix.
Example :
clear, close all hidden
N = 512;
L_vrai = 4;
fe = 2000;
F = (0:(fe/2)/(N/2-1):(fe/2));
snr = [-10 -10 -10 -10];
f = [25 230 500 780];
n = 32;
prob = 0.95;
y = zeros(1,N);
t = (0:(N-1))/fe;
for l = 1:L_vrai
y = y + sqrt(2)*10^(snr(l)/20)*sin(2.*pi.*f(l).*t + 2.*pi.*rand);
end
s = y + randn(1 , N);
[L , R] = nbsinu(s , n , prob);
引用格式
Sebastien PARIS (2024). Number of sinusoids Estimator (https://www.mathworks.com/matlabcentral/fileexchange/4876-number-of-sinusoids-estimator), MATLAB Central File Exchange. 检索来源 .
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1.0.0.0 | Version 1.1 : add some small speed improvements |