Here is a link to the RBDS standard:
ftp://ftp.rds.org.uk/pub/acrobat/rbds1998.pdf
And another link to the digital AM radio standard:
http://www.ibiquity.com/technology/pdf/Waveforms_AM.pdf
On Tue, 14 Feb 2006, Robert McGwier wrote:
Al, Matt:
Thanks for your input. I am pretty ignorant
On Tuesday 14 February 2006 00:13, Robert McGwier wrote:
But the COMPOSITE signal is what is
FM modulated but I bet they do not preemphasize the composite
signal. They might do preemphasis on the L+R baseband signal
as Matt suggests but I just don't know about the others. I
am trying to
All:
I did deemphasis on Left and Right and checked it in just now. It is
much better now. Thanks for the links to the RDS stuff. I will take a
look.
THANKS it already sounds much better.
Bob
al davis wrote:
On Tuesday 14 February 2006 00:13, Robert McGwier wrote:
But the
On Tuesday 14 February 2006 00:13, Robert McGwier wrote:
Thanks for your input. I am pretty ignorant about these FM standards
[snip]
not have hiss that is irritating. But the COMPOSITE signal is what is
FM modulated but I bet they do not preemphasize the composite signal.
They might do
As an interim to really solving the problem. I hacked the gains on
the carrier and stereo DSBSC signal.
My favorite test is
usrp_wfm_rcv -f Frequency_of_STEREO_FM_STATION
and then
usrp_wfm_rcv_pll -f Frequency_of_STEREO_FM_STATION
I will never be able to go back as the stereo separation
