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Re: [Discuss-gnuradio] USRP Tx Rate Conversion
From: |
Eric Blossom |
Subject: |
Re: [Discuss-gnuradio] USRP Tx Rate Conversion |
Date: |
Thu, 17 Apr 2008 09:35:36 -0700 |
User-agent: |
Mutt/1.5.17 (2007-11-01) |
On Thu, Apr 17, 2008 at 11:26:06AM -0400, Brian Padalino wrote:
> On Thu, Apr 17, 2008 at 11:11 AM, Wireless Monster
> <address@hidden> wrote:
> > Brian, Dan,
> >
> > It is working now. Thanks again for your help.
> >
> > One more basic "signal processing question" ... knowing that the input and
> > output are complex (GMSK modulated signal), should I use complex or real
> > coefficients for the resampler filter (rational_resampler_ccc, vs.
> > rational_resampler_ccf) ?
>
> I wouldn't use a ccf. I'd either use an fff on each the real and
> imaginary portions of the signal, or I'd use a ccc on the combined
> signal, but that's just my own personal opinion.
ccf is equivalent to fff on each of the real and imaginary.
(a+bj) * (c+dj) = (ac - bd) + (ad + bc)j
If d is zero -> ac + bcj
Eric
- Re: [Discuss-gnuradio] USRP Tx Rate Conversion, (continued)
- Re: [Discuss-gnuradio] USRP Tx Rate Conversion, Brian Padalino, 2008/04/14
- Re: [Discuss-gnuradio] USRP Tx Rate Conversion, Wireless Monster, 2008/04/15
- Re: [Discuss-gnuradio] USRP Tx Rate Conversion, Brian Padalino, 2008/04/15
- Re: [Discuss-gnuradio] USRP Tx Rate Conversion, Wireless Monster, 2008/04/15
- Re: [Discuss-gnuradio] USRP Tx Rate Conversion, Brian Padalino, 2008/04/15
- Re: [Discuss-gnuradio] USRP Tx Rate Conversion, Dan Halperin, 2008/04/15
- Re: [Discuss-gnuradio] USRP Tx Rate Conversion, Wireless Monster, 2008/04/15
- Re: [Discuss-gnuradio] USRP Tx Rate Conversion, Wireless Monster, 2008/04/17
- Re: [Discuss-gnuradio] USRP Tx Rate Conversion, Brian Padalino, 2008/04/17
- Re: [Discuss-gnuradio] USRP Tx Rate Conversion, Wireless Monster, 2008/04/17
- Re: [Discuss-gnuradio] USRP Tx Rate Conversion,
Eric Blossom <=
- Re: [Discuss-gnuradio] USRP Tx Rate Conversion, Ed Criscuolo, 2008/04/15