Jason,
I am involved in a project that needs the bit stream from
XM but we do not need it decrypted. The acquisition of the unencrypted
Channel 1 would be fun to do, but so far I cannot get Gnuradio blocks to
properly lock on to the signal. The Costas loop drifts through he
QPSK constellation, but won't stay locked on it. That probably means I
don't have something right in GRC or there is an overlay modulation that
confuses the Costas loop phase locking. Until either my hybrid
hardware/GRC setup starts locking onto the XM signal there will be no Channel
1.
Steve Katzberg
----- Original Message -----
Sent: Thursday, April 07, 2016 5:14
PM
Subject: [Discuss-gnuradio] XM on
GR
I was thinking about XM radio today and how channel 1 on it is sent in
the clear (if you don't have a subscription, you can tune to it and hear their
adds). I haven't found a lot of information (so I think I know the
answer), but has anyone looked into an XM receiver in GR?
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