Detecting phase difference between two channels
조회 수: 17(최근 30일)
I dont have a lot of experiance using MATLAB, Can someone please show me how to detect the phase differance between my 2 signals attached, number of samples are 6000 and sample rate is 0.01
Any Help would be greatly appreciated.
Bjorn Gustavsson 2021년 6월 10일
Does something like this extract variations that are related to the breathing-pattern:
phi_u = unwrap(atan2(raw_ad_data_sine,raw_ad_data_cosine));
fK = hanning(1001); % Arbitrary choise of low-pass filter
fK = fK/sum(fK);
plot(t,phi_u) % Raw unwrapped phase
plot(t,filtfilt(fK,1,phi_u)) % low-pass-filtered phase
plot(t,phi_u-filtfilt(fK,1,phi_u)) % unwrapped phase with slow variations removed.
Since we dont know what signal to extract it is difficult to advice. My gues is that your mixing signals are too close to the breath-pattern in frequency.