drawbacks of fourier series
hi
consider,u have 2 signals---- sin (2*pi*100*t) + sin (2*pi*200*t) ...the other isa time varying one with sin (2*pi*100*t) for 10 secs and then changes to sin (2*pi*200*t) from 10th second onwards..when we take fourier transform,
for the first signal and second signal,then we find that both have the same transform(i.e. impulse at the same frequencies.)so,even though they are different in time domain,they have same freq domain graph which is obsurd.so,to bring the time domain into picture,we go for wavelets,were we plot time,freq and amplitude simultaneously..
regards