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How do we estimate instantanious frequency of a signal using S-transform ?
- You don't. Instantaneous frequency shows you the dominant frequency at each time sample of the signal. Time-frequency representations like the S-transform show you all the magnitudes (and phases) of each frequency component at each time sample. So the instantaneous frequency would be something like finding the frequency with the highest magnitude at each time sample. However, this assumes that there is only one peak frequency and sometimes this is not the case. In this case the instantaneous frequency calculation will be all messed up. This is why time-frequency representations are used. Hamsterlopithecus (talk) 19:22, 21 January 2016 (UTC)