Re: [Discuss-gnuradio] first attempt at gnuradio - ssb phasing demod

[Charles Swiger]

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 edges    L  < 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
> 
> -H, -L
> 
> Take the real part, make imaginary part = real part.
> 
> send complex signal to sound card.
> 

Do we have tools to make complex (negative freq) filter coeffecients?
(other than externally in matlab etc).  I see 'optfir' but looks like
it makes float taps too.

--Chuck