Using pwelch to a set of signals: some questions (Matlab)
问题 I would like to use pwelch on a set of signals and I have some questions. First, let's say that we have 32 (EEG) signals of 30 seconds duration. The sampling frequency is fs=256 samples/sec, and thus each signal has length 7680. I would like to use pwelch in order to estimate the power spectral density (PSD) of those signals. Question 1: Based on the pwelch 's documentation, pxx = pwelch(x) returns the power spectral density (PSD) estimate, pxx, of the input signal, x, found using Welch's