Hi All:
I'm trying to use the matplotlib psd function to plot some data. The
result from MATLAB's pWelch function looks vastly different.
Any suggestions/recommendations would be greatly appreciated!
THANXS
amb
Here is the MATLAB code:
Fs = 13e6;
fid = fopen('C:\asp\roseRT\ics_output.bin', 'r', 'ieee-le');
s = fread(fid, [2, Inf], 'int32');
fclose(fid);
z = complex(s(2,:), s(1,:));
pwelch(z, [], [], [], Fs)
And here is the (hypothetically) equivalent Python/matplotlib code:
datatype = np.complex64
fd = open(self.filename, 'rb')
read_data = np.fromfile(file=fd, dtype=datatype)
Pxx,freqs = psd(read_data,Fs=13000000)
self.axes.plot(freqs, 10*log10(Pxx) )
self.canvas.draw()
Ambrose Lewis
SAIC
4001 N Fairfax Drive, Suite 400
Arlington, VA 22203
703.558.2786
ambrose.j.le...@saic.com
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