My original title was going to be approximately Murky region between "Fourier Series" and "Fourier Transform" Think there should be a similarly simple title with "periodic" ;/ I suspect that deep down I see the FFT as just a convenient method to calculate a 'Fourier Series' valid over a specified time period.

# What is DSP equivalent of Planck's constant?"

Started by ●February 28, 2011

Reply by ●February 28, 20112011-02-28

On Feb 28, 3:38�pm, Richard Owlett <rowl...@pcnetinc.com> asked: What is DSP equivalent of Planck's constant? How about 1 or 2 or 1/2pi or 1/4pi depending on who you talk to, whether you measure frequencies in radians/second or Hertz, and how you define the time duration and bandwidth of a signal. This is the minimum value of the time-bandwidth product of a signal, and resembles the uncertainty principle dx.dp >= h/4pi where h is the (unnormalized) Planck's constant. There was a discussion about this matter in comp.dsp about six months ago. --Dilip Sarwate