Definitions of power vary by field. A few things:
- currently, your power will change if you alter sampling rate. This should fix that:
Power=mean(St.^2,2)/Fs^2;
- sometimes, "power" means total energy, not energy per time. Use sum in that case
- This signal is effectively zero for most of it's duration. If this is a single pulse (vs a periodic signal), average energy depends on your choice of sampling duration
