Lowpass equivalent spectrum
- From: "Rossely" <spam@xxxxxxxx>
- Date: Tue, 7 Apr 2009 07:44:31 +0200
I'm studing bandpass to lowpass conversion. My book says the following:
Lowpass equivalent spectrum, simply equals the positive-frequency portion of
band pass signal, translated down to the origin.
My question is about the signal energy, following this rule energy of
baseband signal is 1/2 energy of passband signal. In frequency the signal
has been truncated so:
int ( -inf , +inf, band_pass_signl(f) df ) = 1/2 int ( -inf , +inf,
low_pass_equivalent_signl(f) df )
Why we define Lowpass equivalent?
Thank you very much for your support!