What is the difference between the functions PSD and PWELCH?
Both of these functions use Welch’s method to estimate the PSD.
ANSWER
Matlabsolutions.com provide latest MatLab Homework Help,MatLab Assignment Help for students, engineers and researchers in Multiple Branches like ECE, EEE, CSE, Mechanical, Civil with 100% output.Matlab Code for B.E, B.Tech,M.E,M.Tech, Ph.D. Scholars with 100% privacy guaranteed. Get MATLAB projects with source code for your learning and research.
We highly recommend that you use PWELCH for Welch’s method of estimation rather than PSD. Although PSD was an implementation of Welch’s method, PWELCH was added for the following reasons:
The name of the function PWELCH reflects much better the method used to obtain the spectral estimate. PSD is too generic, in fact there are several different algorithms for psd estimation.
Also, PSD does not scale the data by a factor of Fs (sampling frequency). Thus, PSD was actually more of a power spectrum estimate (yielding units of power or db) whereas PWELCH and our other functions return a power spectral density estimate (yielding units of power/freq or db/freq).
SEE COMPLETE ANSWER CLICK THE LINK
