I would like to use DFT,FFT or some other technique to derive frequency
domain data of a signal that is sampled at different, but known rates.
An example: my signal is sampled first at T1 and then at T2, T3, and
finally at T4. This pattern continually repeats and the time interval
between T1 and T2, T2 and T3, T3 and T4, T4 and T1 is different for the 4
cases but the time interval is known.
My first thought was to collect all the T1 samples and peform the FFT on
them and effect the same for the T2,T3 and T4 cases. But this approach
cuts my effective sampling rates by 4 and I really can't live with that.
I guess what I'm looking for is a way to adjust the T2,T3 and T4 cases
relative to the T1 time interval and perform an FFT as if all data was
sampled at the same rate. Any ideas on this?
Thanks in advance