Almost. Translate the carrier to where you want it to be and then use a
complex bandpass filter to pick off the sideband.
make the filter edgesL < H for your favorite bandwidth (H-L)
for USB, make a complex filter with edges L, H
for LSB, make a complex band pass filter with edges
On Sat, Mar 04, 2006 at 06:49:25PM +0100, Matteo Campanella wrote:
> Hello, I have made my first attempt at gnuradio and usrp today, trying
> to get a phasing ssb demod - what follows is what I got, any suggestion
> would be more than welcome. The demod is designed as a class to be
> istantiated by
Hello, I have made my first attempt at gnuradio and usrp today, trying
to get a phasing ssb demod - what follows is what I got, any suggestion
would be more than welcome. The demod is designed as a class to be
istantiated by a gui (i am using a modified version of usrp_wfm_rcv
gui). Right now the o
On Fri, 2006-03-10 at 14:24 -0500, Robert W McGwier wrote:
> We are giving away all the secrets. The only secrets in SDR DSP are how
> to make a complex filter and how to overlap-NNN based convolution of an
> FIR. All the rest is glue logic.
>
Well, that does open up a whole new world. Here i
On Fri, 2006-03-10 at 11:40 -0500, Bob McGwier N4HY wrote:
> I missed this question for 3 days.
it took 3 days to hit the list
> Yes we do. And here is how it works
>
> It makes a real, low pass filter with cutoff
>
> (H-L)/2
>
> and then spins the coefficients to the correct frequency usi
Robert W McGwier wrote:
We are giving away all the secrets. The only secrets in SDR DSP are
how to make a complex filter and how to overlap-NNN based convolution
of an FIR. All the rest is glue logic.
;-)
Having built 3 different applications based on GnuRadio at this point, I
can say that
We are giving away all the secrets. The only secrets in SDR DSP are how
to make a complex filter and how to overlap-NNN based convolution of an
FIR. All the rest is glue logic.
;-)
Bob
Charles Swiger wrote:
On Fri, 2006-03-10 at 11:40 -0500, Bob McGwier N4HY wrote:
I missed this questi
I missed this question for 3 days. Yes we do. And here is how it works
It makes a real, low pass filter with cutoff
(H-L)/2
and then spins the coefficients to the correct frequency using a complex
sinusoid.
It is used in a few places in usrp_wfm_rcv_pll.py
Bob
Charles Swiger wrote:
O
On Sun, 2006-03-05 at 00:48 -0500, Robert McGwier wrote:
> Almost. Translate the carrier to where you want it to be and then use a
> complex bandpass filter to pick off the sideband.
>
> make the filter edgesL < H for your favorite bandwidth (H-L)
>
> for USB, make a complex filter wit
