What are the limitations of implementing the lock in detection technique in matlab? I have time varying data with known frequency with huge background noise. The reference signal is also available. How efficiently can i recover the signal from the noise using the software implementation of the lock in detection?
4
-
2$\begingroup$ What have you tried so far? You say the reference signal is available. Have you tried multiplying your noisy signal by the reference signal? Do you also have a 90-degree shifted reference signal? $\endgroup$– BenCommented Jan 20, 2020 at 13:22
-
$\begingroup$ I tried multiplying the signal with the reference and taking mean, but the result is not good. I only need the amplitude of the signal, so the 90-degree reference needed then? $\endgroup$– ACJCommented Jan 21, 2020 at 4:35
-
1$\begingroup$ Why dont you edit your question and add all the information of what you have tried and where did you fail? $\endgroup$– IrreducibleCommented Jan 21, 2020 at 8:12
-
$\begingroup$ Perhaps it would be helpful to read the questions, comments and answers here: dsp.stackexchange.com/q/34176/41790 $\endgroup$– Ed VCommented Jan 28, 2020 at 3:09
Add a comment
|