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Altera_Forum's avatar
Altera_Forum
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15 years ago

phase difference 2 signals.

is possible whit fpga FFT or similar metod measure a phase difference from 2 PULSED-sinusoidals signals? the freq of signals is 60MHz but the duration of signals is 0.5uSEC, and the PRF of pu...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

If you have matlab, you can try this code (not tested):

%assuming Fs = 240Msps

%signal 1

offset = 100;

x1 = sin(2*pi*(0+offset:200000+offset)*60/240);

x1(1000:1000:end) = 0; %switch off

%ref

xref = sin(2*pi*(0:200000)*60/240);

y1 = fft(x1,1024);

y2 = fft(xref,1024);

A1 = abs(y1);

A2 = abs(y2);

ph1 = angle(y1);

ph2 = angle(y2);

you will then check A/ph at relevant bin