[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
RE: [linrad] DSP Question
Here h[k] represents a low pass filter as Oleg states.
It's design parameters besides length are where the cutoff
is. If you want a complex bandpass filter, centered at w0
as in Oleg's formula to have bandwidth B, then the cutoff
frequency for your lowpass filter with taps h[k] is B/2.
This is because a real lowpass filter is nothing more than a bandpass
filter with center frequency at 0. It has as much bandwidth below
zero frequency as above.
[mailto:owner-linrad@xxxxxxxxxxxxxxxxxxxxxx]On Behalf Of Oleg Skydan
Sent: Friday, April 23, 2004 4:56 AM
To: Linrad List
Subject: Re: [linrad] DSP Question
Hi, Mark !
> I assume that t represents the sample interval
No, t is just the time.
You need just to do the following:
N - FIR length
T - sample period
h - LPF FIR taps
w0 - the center of the resulting BPFs
All the best !