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%% Specifying Sampling Frequency and Subspace Dimensions % This example analyzes the same signal vector, |x|, with an eigenvalue % cutoff of 10% above the minimum. Setting |p(1) = Inf| forces the % signal/noise subspace decision to be based on the threshold parameter, % |p(2)|. Specify the eigenvectors of length 7 using the |nwin| argument, % and set the sampling frequency, |fs|, to 8 kHz: % Copyright 2015 The MathWorks, Inc. %% rng default n = 0:199; x = cos(0.257*pi*n) + sin(0.2*pi*n) + 0.01*randn(size(n)); [P,f] = pmusic(x,[Inf,1.1],[],8000,7); % Window length = 7 plot(f,20*log10(abs(P))) xlabel 'Frequency (Hz)', ylabel 'Power (dB)' title 'Pseudospectrum Estimate via MUSIC', grid on