MSDhoni
Newbie level 4
I have a signal at 11000.085 Hz with amplitude 1V and 150' phase. It is sampled at 1MHz and 50000 datapoints are collected. To find the FFT I'm also using the Hanning window but the measured phase from the FFT is 150.52' which means error of 0.52'. I suspect this error exists as the number of datapoints per cycle of the signal is not an integer.
1) How accurately can the phase be measured using the different windowing functions when number of datapoints per cycle is not integer ?(In my application I would like to have measurement accuracy upto 2nd decimal)
2) If FFT algorithm with windowing function can not measure the phase without the absence of this error then is this error an systematic error which can be calculated ??
1) How accurately can the phase be measured using the different windowing functions when number of datapoints per cycle is not integer ?(In my application I would like to have measurement accuracy upto 2nd decimal)
2) If FFT algorithm with windowing function can not measure the phase without the absence of this error then is this error an systematic error which can be calculated ??